Rectified DC power supply system sensor design elements

DC power meter management control in electrolysis industry has a pivotal position , it is one of the main technical assessment indicators tapping the potential of business efficiency , but also to protect one regulating rectifier power source running smoothly , so that the DC sensor power rectifier system accurate, stable and reliable is very important.As we all know , the current domestic market popular DC current sensors and closed-loop two separate forms , and the two forms of Car Temperature Sensor measurement accuracy has its theoretical basis , are based on the current Hall elements collected by the air gap in the magnetic circuit and the magnetic field is proportional to the voltage signal converted over , under current law the theoretical framework of the whole design .Factors affecting the DC sensor measurement accuracy depends largely on the choice of the core and the Hall device , as much as possible to ensure the performance of magnetic materials , magnetic materials forming around them a special process to deal with the structure , making the magnetic material permeability is improved, so that Coolant Temperature Sensor has been effectively guaranteed linearity . In the Hall devices , the requirements of its good work in the constant temperature stability and output linearity , and with good frequency characteristics.DC sensor circuit board preferably double-sided gold-plated plate , electrical connector preferred fasteners to ensure high reliability products ; temperature compensation process in terms of a single Hall element to prevent the influence of temperature on the outside of the electronic Crank Position Sensor concentrated in a circuit portion controlled thermostat box inside , avoiding the influence of a local temperature coefficient of the offset caused by the change in the system occurs , thus ensuring the high stability of the product ; the sensor selection circuit structure is preferably three differential amplifier circuit , eliminating the Hall element is greater than the output resistance of the op amp input resistance generated errors. After stage amplifier circuit sensor multistage isolation amplifier output , the output signal interfere with each other , so that the DC current meter with large access control system is very convenient. Multiple parallel rectifier , when one station blackout, straight nets reverse side short circuit short-circuit current is large, the contact sensor to set a limit reverse current protection , to reverse the protective effect of the rectifier unit.

The definition and use of fiber Bragg grating sensors

FBG sensors sensing process is modulated by external parameters on the Prague center wavelength pass to get emotional interest , which is a wavelength modulation type optical fiber Shaft Position Sensor, FBG sensors should therefore belong in a special class of optical fiber sensors . Currently fiber grating and its application in optical fiber sensors and optical fiber communications caused widespread concern.FBG sensors can directly measure temperature , strain and other physical quantities . As the fiber grating wavelength sensitive to temperature and strain simultaneously , namely temperature and strain caused by the fiber grating coupler wavelength while moving , making it impossible to distinguish between temperature and strain by measuring the wavelength of the fiber grating coupler move .FBG Car Temperature Sensor have immunity to electromagnetic interference , signal bandwidth , high sensitivity , ease of reuse, light weight, and so is suitable for use in high temperature, corrosive hazardous environments advantages. Since 1989 the United States Morey , who first studied strain and temperature sensor FBG conducted since the world are very concerned and carried out its extensive applied research, in just 10 years time has become the FBG sensor field development fastest growing technology and success in many fields of application , FBG sensors have a very wide range of applications in large-scale construction and safety monitoring wells and other special occasions.

What is the characteristics of strain pressure sensor

Pressure sensor is a kind of commonly used sensors, widely used in medical, ships, aerospace, petrochemical, machine tools and other industries. Pressure sensors need to know when in use of knowledge is also a lot of, among them the characteristics of strain pressure sensor for users is also a need to understand, here is for everyone to introduce what is the characteristics of strain pressure Automobile Temperature Sensor.The measuring range of the pressure sensor is twice as big as the inductive sensor, it can not only detect metal target, but also detect dielectric, such as paper, glass, wood and plastics, and even can be detected by a wall or paper shell. Because the human body in low frequency is equal to the electrical conductor, thus can be used for the quiver measurement and alarm.
In the measurement of strain, the strain gauges can be on the component, but if the measuring force, pressure, acceleration, should first change the physical quantity measuring strain, and strain gage, a conversion process more than direct measurement, to complete the conversion process is usually called the original as the elastic elements, therefore, the strain Camshaft Position Sensor is usually made of elastic sensitive components and the strain gauge is composed of two parts.
Elastic sensitive element is a core component of sensor, elastic component of elastic energy storage requirements high, usually expressed as elastic material storage and deformation work without permanent deformation. Pressure sensor has good mechanical processing and heat treatment performance, has high compressive strength. Influence of temperature and other characteristics, correct choice of elastic sensitive components and strain gauge bridge is an important way to improve the strain sensor:
1 measuring range, high precision, the force sensor can measure the force of 0.01--1000000N, the accuracy can reach more than 0.05%FS; the pressure sensor can measure the pressure of 0.1-1000000, the accuracy can reach 0.1%FS.
2, stable and reliable performance, long service life, such as weighing type mechanical lever, the lever, the knife edge part of mutual friction loss and deformation, we want to maintain its accuracy is quite difficult, using resistance strain weighing sensor made of electronic pump, truck scale, railway scale, long-term stable operation in harsh environmental conditions.
3, the frequency response characteristic of excellent. Pressure sensors of resistance strain gauge response time is 0.01MS, the dynamic process of semiconductor strain gauge can reach strain sensor if 0.001MS can take measures in the elastic component is constitute by them can be measured in tens or even hundreds of Hertz hz.

Building materials used in the experiments

In building materials , especially concrete drying process, we should pay attention to the drying trend, which is one of the indicators of the evaluation of products, but also for the construction side to provide a reliable data. Application of temperature and humidity Crank Shaft Position Sensor can record this data and provide building materials research side , the construction will provide useful help . Especially in military construction , time is life , accurately grasp the concrete drying time is starting cause the enemy , in order to effectively provide the vital forces on the battlefield to provide a guarantee , this feature can be completed by the temperature and humidity Crankshaft Positioning Sensor. Monitoring and recording of temperature , can confirm its quality assurance Immunization . Temperature and humidity sensors convenient and reliable solution to this problem. Different vaccines , the vaccine with different storage temperature requirements . To ensure that bacteria, vaccine safety during storage and transport , and storage and transportation process must be carried out to detect the ambient temperature record of the whole process , and should be fully automated detection recording , there should be no human factors , in order to improve data reliability. High quality precision temperature and humidity sensors can perfectly accomplish this function , because it can also be a long record in the absence of external power supply situation.

Used in the vaccine cold chain

In vaccines, vaccine and other biological products shipped from pharmaceutical finished products warehouse , the cold chain storage and transportation process to the relevant population vaccinated , its environment through the use of the vaccine in the vaccine cold chain , vaccines and other biological products from pharmaceutical finished goods warehouse shipped to cold chain storage and transportation process to the relevant population vaccinated , by its environment monitoring and recording of temperature , can confirm its quality and ensure immunization effect. Temperature and humidity Motor sensor convenient and reliable solution to this problem. Different vaccines , the vaccine with different storage temperature requirements . To ensure that bacteria, vaccine safety during storage and transport , and storage and transportation process must be carried out to detect the ambient temperature record of the whole process , and should be fully automated detection recording , there should be no human factors , in order to improve data reliability. High quality precision temperature and humidity Camshaft Position Sensor can perfectly accomplish this function , because it can also be a long record in the absence of external power supply situation.

The role of the crankshaft sensor

An engine ignition time ( say a little simple, it is the moment of spark ignition , the corresponding crankshaft position ) , is to be very accurate ( correct to say that there is a range in which the crankshaft to an angle within the range requiring Fireworks plug ignition , not to this position the crankshaft , the ignition spark plug , the engine is possible that the normal work ) , the carburetor before the car, with a mechanical power switch to control the spark plug , Just go to Camshaft Position Sensor , spark plugs will ignite. . . Now all electronically controlled , and , then , go to the computer you want to know what the crankshaft angle ( position ) , you can only think of ways to engage an electrical signal , let the computer know what angle to the crankshaft in the end , but to the best one ignition position , the computer controlled ignition . . . . Second, the crankshaft position only to have strict requirements ignition timing , fuel injection is relatively minor, because , injection slowly earlier , the impact of work on launching fee is not great, but , if ignition is not normal , then a great impact . Third, there is a common crank Car Temperature Sensor , electromagnetic ( on a side of the crankshaft gear . Front chainring ) , a simplified physical model is a small permanent magnet generator , it is the most common kind , ,,, , the other type of photoelectric ( a small disc , open at the many small holes in the upper and lower plate , mounting points corresponding to the device and the photosensitive device , a light emitting element , the light emitted when the circle hole position to the disk , the light shine on the photosensitive member following the reception of light ) , light is actually a simplified model of the battery , there is a Hall sensor . . , Swiss road running car , more than 95 % of all first .

Air temperature sensor

Automatic air conditioning system temperature sensor includes : engine coolant temperature sensor , in-car temperature Sensor Camshaft , ambient temperature sensor , evaporator temperature sensor. According to these sensor signals the control unit calculates the desired blowing air inside the cabin temperature , select the desired amount of air , and then control the air mixture inlet valve, out of air intake converter board , etc., within the temperature range set by the driver automatically adjust the temperature inside the cabin , to achieve the best , and automatic control of air conditioning on and off. One condition is that the air conditioning system refrigerant temperature higher than the room temperature, the ambient Engine Water Temperature Sensor circuit , the terminal water , poor contact or poor ground , the data stream will be displayed below the ambient temperature -30 ℃, will cause no refrigeration . Meanwhile, the engine coolant temperature sensor circuit or ground wire is bad, the signal loss of time, the cooling fan does not turn , lead to poor air conditioning cooling, will enter the fail-safe , so air conditioning stopped working

Motor bearing temperature sensor installation and use

Measurement of motor bearing temperature, the sensor junction box installed in the appropriate position of motor,Tighten the connecting screws, connecting wire.The temperature sensing element transducer (probe) is inserted into the screw hole in the vicinity of the motor bearings (such as motor casing, shaft casingdrilling), and tighten the mounting nut.The junction box of Shaft Position Sensor is opened, will leadcable connected, theboxcover,willleadto thecable to designatedlocations and intrinsically safe type two meter connectioninstallation lead atCoolant Temperature Sensor intervals of 300mm head is fixed by binding, wire spring tubebending radius is not less than 60mm, lead too long can pull ring in the right place,and far from the heating equipment.

If you choose "not moving" nut installation, the installation must first install theprobe part, then mounted junction box

The structure and working principle of the knock sensor

Knock sensor is an important component of engine electronic control system, its function is to detect whether the engine detonation, and the signal sent to ECU engine. Knock sensor common has two kinds, one is the magnetostrictive knock sensor, a piezoelectric type knock sensor. Magnetostriction type knock Engine Water Temperature Sensor in which a permanent magnet, permanent magnet excitation by around the magnetic core and the iron core coil. Its working principle is: when the engine cylinder block vibration,Car Temperature Sensoris about 7kHz and the engine to produce resonance, strong magnetic material core permeability changes, resulting in a permanent magnet flux density through the core also change, so as to generate the induced electromotive force in winding around the core, and the electrical signal input ECU. Piezoelectric type knock sensor using the effect of piezoelectric crystal or ceramic polycrystals and work, but also the use of piezo resistance effect of the doped silicon. The sensor housing is provided with a piezoelectric element, counterweight block and wire etc.. Its working principle is: when the engine cylinder block vibration and vibration transmitted to the casing of the sensor, relative movement between the shell and the counterweight, variation of piezoelectric element is clamped in between the pressure occurs, resulting in voltage. ECU detects the voltage, and according to the size of its value judgment of knock intensity.

What is the tension sensor works

What is the tension Coolant Temperature Sensor works ?Elastomers ( elastic components, sensitive beam ) elastic deformation under external force , so that he pasted on the surface of the resistance strain gauge ( conversion element ) also accompaniedCar Sensors deformation, deformation resistance strain gauges , its resistance will change ( increase or decrease ) , and then by a corresponding change in resistance of the measuring circuit is converted to an electrical signal ( voltage or current ) , thereby completing the process of an external force into an electrical signal .

Tension sensor known as resistance strain sensor

Tension sensor known as resistance strain Cooling Temperature Sensor , part of the load cell series, is a physical signal into a measurable electrical output of the device , which uses two passes some tension power transmission , in its structure containing force-sensitive force transfer device and the two parts , the pressure sensitive device comprising a piezoelectric film , the piezoelectric sheet gasket, the latter comprising a substrate portion and the edge portion of the force transmission , characterized in that the two force transmitting portion are respectively fixed on both ends of , together with the working surface between the ends of the transverse clamping force-sensitive device , the side of the piezoelectric sheet gasket pressure in the central region of the piezoelectric film , the substrate portion is the other side of the piezoelectric sheet edge portion of the force transmission room and close the piezoelectric film, one of its purposes is to be made to replace the rod hook scales weighbridges . The actual working environment is essential for the correct selection of tension Coolant Temperature Sensor , it is not only related to the force sensor can work as well as its safety and service life , and even the whole scale reliability and security .

What is the working principle of the anti explosion sensor

For the use of sensors in flammable and explosive occasions, in order to avoid the occurrence of explosion, usually with explosion-proof requirements of the product. There are three main sensor explosion-proof methods, respectively, is to control the explosive gas explosion detonated, control limitations and control source. The working principle of the three methods do briefly introduce: 1, control and explosive gasThe working principle is the box body burst in a sealed compartment, with clean air or inert gas does not contain explosive gases, and keep the inside pressure is slightly higher than the tank pressure, the sensor is installed in the box. Representative for the positive pressure explosion-proof method Exp. 2, control the explosion limitThe working principle is according to Exd standard, Crank Position Sensors housing design for flameproof standard housing, according to the shell explosion-proof standard instrument design, according to the standard design, manufacture and assembly of severely all management process, in the attack the shell explosion not to excite the shell of gas explosion risk.
Isolation design and manufacture standard proof explosion-proof measures extremely severe, and operating procedures, and repair of the assembly connection is also very strict. Electrical equipment, the way of determining the flameproof instrument are very strict, the operation must be off, but many cases is the most useful method. 3, ignition control source principle is applied safety gate isolation wiring, processing from Cooling Temp Sensor is in electric power distribution, will supply the field sensor energy limited in both cannot occur enough to detonate the spark, and can safely confined to surface temperature rise within the instrument. According to the national standards of international norms and China, when the peace gate safe area at one side of the connecting device to attack any obstacle, essence safety explosion-proof measures to ensure that explosion risk on site safety need to remind you to consider in the purchase of Cooling Temperature Sensor for the use of different occasions and configuration, choose according to need the intrinsically safe type, flameproof type sensors and instrumentation also required, Ex explosion-proof certification from suppliers.

Capacitance weighing sensor's faults

No matter what the sensor has its own advantages and disadvantages, the weighing sensor is the same, it is mainly used to quality signals into electrical signals, the advantages of capacitance sensor is low power consumption, low cost, what are the disadvantages of it, we come to understand in detail. Disadvantages: high output impedance, low load capacity
Capacitance Cooling Temperature Sensor capacity by the electrode geometry restriction very difficult to do, generally tens to hundreds of micro method, even only a few micro method. Therefore, the output impedance capacitive weighing sensor is high, so the load capacity is poor, vulnerable to outside interference produced unstable phenomenon, serious and even unable to work. We must take shielding measures properly, to design and the use of inconvenience. Capacitance sensor also requires insulation resistance value is extremely high, otherwise the insulation performance of part as bypass resistance and affect the instrument, so we should also pay special attention to the surrounding environment such as temperature, cleanliness, etc.. If the use of high frequency power supply, can reduce the output capacitance weighing sensor resistance, but the high frequency amplifier, sensor than low frequency complex, and the effect of parasitic capacitance, is not easy to ensure the stability of the work. Two shortcomings: the output characteristics of output characteristics of nonlinear capacitance weighing sensor is nonlinear, although the use of differential type to improve, but can not be completely eliminated.Engine Coolant Temperature Sensor for other types of only ignores the edge effect of electric field, the output characteristics is linear. Additional capacitance or the edge effect will be directly superimposed sensor capacitor, the output characteristics of nonlinear. Disadvantages: three parasitic capacitance effect of initial capacitor capacitance weighing sensor is small, and the lead capacitance, electronic circuit connected with the sensor and the electronic circuit of the stray capacitance and inside Coolant Temperature Sensor plate and the surrounding conductors capacitors and other so-called missing large parasitic capacitance, not only reduces the sensitivity of the sensor, and the capacitance is often random variation the instrument, work is not stable, influence the accuracy of measurement. So the cable selection, installation, connection method has strict requirements. For example, with good shielding property, its small distributed capacitance of high frequency electric wire as the lead, lead is thick and short, to ensure the instrument stray capacitance is small and stable and so on, otherwise it can not guarantee the high measurement precision. It should be pointed out that, along with the material, technology, electronic technology, especially the rapid development of technology, the capacitance weighing sensor has been developing and constantly overcome shortcomings. The capacitance sensor is becoming a high sensitivity, high precision, low pressure sensor in dynamic, and some special measurement has a promising.

Pressure sensor is how negative

Pressure sensor vacuum is how ? Pressure sensor is used to measure the negative pressure and vacuum , regular contact with the negative pressure of the pressure sensor will find generally negative pressure sensor measuring the negative pressure of the maximum range is -100kpa or is -0.1 MPA. But there are very few manufacturers say can be measured to -300kpa even lower, which in the end is how it happened ? Fact, this is two different angles analysis . Studied physics knows vacuum pressure -100kpa, so that the general Camshaft Positioning Sensor measures the pressure is the lowest -100kpa is the basis of this , so the market is basically the lowest negative Auto Temperature Sensor can measure -100kap, that - 300kpa sensor is how it happened ?-300kpa fact not refer to atmospheric pressure , and physical stress on both a reference, you can understand , in a sealed box filled 300kpa high pressure gas , which sets stood a vacuum boxes , we use negative Crankshaft Positioning Sensor placed outside the big box to measure the pressure inside a small box , which would show a -300kpa, so that -300kpa pressure is produced . It is not with reference to atmospheric pressure . Understand this concept we chose negative pressure sensor can be helpful, so we do not choose the wrong pressure sensor , which is why we often help customers choose the pressure sensor when the first use of the environment will ask him to ask his range how much. Only then will not choose the wrong pressure sensor.

How to choose the flow sensor

Flow sensor how to choose ? Information technology is a major force in the computer, communications technology, then there is a sensor , the sensor market promising, with advances in technology , increased levels of automation , our special attention to development of sensors . Test procedures and standards are flow sensor flow meter can accurately measure of protection. In many areas of the economy , the flow of accurate measurements have become very important , for example: environmental monitoring , health care , security , and trade settlement and so on. Why do you want to develop a Engine Temperature Sensor ? Now , product type flow sensor has been increasing, and almost every year there will be a number of new sensors for your choice . These sensors have their own economic and technical characteristics. Therefore, consumers should be generous to accept their presence , so you can successfully promote the great advances in technology . However, the new sensors are not necessarily mature technology , a lot of new products out of the technology was not mature enough , but not to promote technological progress, so that either improve them or let them social outcasts . Some flow sensor is not sufficient in many occasion in experiments conducted in the laboratory, but only some of the experiments on the market . In fact, these sensors , there are still many unknown factors, but does not have the national conditions of some of the technical regulations . Therefore, Positioning Sensor should be prohibited extensive promotion and application , otherwise , it brings the community is definitely a bad influence. According to the nature of the flow sensor standard classification , can be divided into the following categories . Method Standard : Engine Water Temperature Sensorcalculation method, detection methods , test methods and performance assessment methods, etc. ; basic standards : Some basic parameters of the sensor specifications , models, naming, and in the measurement process jargon ; product standard : it provides sensor technology requirements, acceptance of rules , test methods and product categories , in addition , there are proper installation and use requirements, etc. There are some standard that only the correct installation and use of technology, which is the product of the nature of the standard product applications .

Why do you want to develop a standard sensor

Why do you want to develop a standard sensor ?Now, the type of product flow sensor has been increasing, and almost every year there will be a number of new sensors for your choice . These sensors have their own economic and technical characteristics. Therefore, consumers should be generous to accept their presence , so you can successfully promote the great advances in technology . However, the new sensors are not necessarily mature technology , a lot of new products out of the technology was not mature enough , but not to promote technological progress, so that either improve them or let them social outcasts . Some flow sensor is not sufficient in many occasion in experiments conducted in the laboratory, but only some of the experiments on the market . In fact, Crankshaft Positioning Sensor , there are still many unknown factors, but does not have the national conditions of some of the technical regulations . Therefore, such sensors should be prohibited extensive promotion and application , otherwise , it brings the community is definitely a bad influence. According to the nature of Crankshaft Sensors standard classification , can be divided into the following categories . Method Standard : Some Camshaft Position Sensor calculation method, detection methods , test methods and performance assessment methods, etc. ; basic standards : Some basic parameters of the sensor specifications , models, naming, and in the measurement process jargon ; product standard : it provides sensor technology requirements, acceptance of rules , test methods and product categories , in addition , there are proper installation and use requirements, etc. There are some standard that only the correct installation and use of technology, which is the product of the nature of the standard product applications .

Speed ​​sensor is a sensor measuring the speed of the object

Speed ​​sensor is to measure the speed of an object 's sensor, which is very useful in the field of robotics , incremental displacement per unit time is speed . Including line speed and angular speed , corresponding to the wire speed sensor and an angular velocity sensor , we are collectively referred to as the speed sensor. Digital speed sensor performance are: ( 1 ) number of pulses and resolution. Digital speed sensor output is a pulse signal , the number of output pulses per revolution Shaft Position Sensor resolution. ( 2 ) frequency modulation. Constant when the sensor is rotated, the frequency modulation is offset relative to the center frequency swing . ( 3 ) frequency response. Sensor output pulses are frequency dependent , above a certain frequency response , the sensor output pulse waveform deterioration , the error is too large, the sensor malfunction . Typically , the maximum frequency response of Engine Water Temperature Sensor is large, can meet the requirements. ( 4 ) the moment of inertia . Moment of inertia of Coolant Temperature Sensor dynamic characteristics of the system have a greater impact, and starting the drive motor directly affects the output of the sensor , therefore , the rotational inertia of the sensor should meet the dynamic requirements of the drive system .

The performance of all kinds of different digital sensors , should be based on different applications

The performance of all kinds of different digital sensors , should be based on different applications , use of different digital speed sensors. Several major applications are presented . 1 , analog DC motor speed control DC motor speed control analog feedback with analog voltage and frequency in two ways. The former DC tachometer generator as a Engine Coolant Sensor , because the DC tachometer generator inherent defect, so that people consider using other types of speed sensor as a speed feedback . Wherein the speed feedback element is a magnetic sensor via digital speed F / V conversion , and filtered into a DC level back to the comparing circuit for controlling the rotational speed . The speed control method is not only simple , reliable, and low cost.
2, the DC motor incremental motion control with high precision for complex control applications requires the use of incremental motion control methods to meet system requirements. Incremental motion control only controls the speed of movement , but also for positioning control and frequent starts and stops acceleration and deceleration control . The speed feedback system with digital Coolant Temperature Sensor output digital signal that can achieve these various control requirements. Incremental movement of the DC motor speed control system in the encoder sensor digital Camshaft Position Sensor. Speed ​​digital speed sensor output signal is fed to the comparison circuit and a regulating circuit , to meet the fast high-precision servo control, and requirements for wide speed control , which is often used in modern incremental movement speed feedback method . 3, the phase lock servo motor speed control system is controlled by the speed feedback to regulate due to mechanical loads or changes in the environment caused by such speed deviation . This method of control is to regulate the nature of the case of a difference , speed accuracy is not high, although the number may be used to improve the accuracy of incremental control , but still can not meet the high precision speed control requirements. The lock-in technique for speed control , can achieve synchronous motor control is achieved without droop . Lock-in technique to compose for servo controlling the phase lock servo control system, which phase lock loop is determined by the reference frequency generator , an encoder , a phase frequency comparator , a low pass filter, amplifier and DC motors and other components.

What point load cell selection

Choose to use the load cell should first consider the use of the actual needs , in addition to meet the measurement accuracy and the main technical performance , but also taking into account economic and practical aspects. Load cell due to the different structure and elastomeric properties of different strain gauges used , while in measurement accuracy and Cooling Temperature Sensor will be different, and different manufacturing processes , production costs will be very different , the price is consequent different so to the actual needs of considering applications to choose the appropriate load cell. With the widespread use of anomalies and failures have also occurred , checked judge , mainly human error . Here's fault generated links , causes, phenomena analysis and countermeasures from the selection, transportation, installation , use, maintenance, overhaul several ways to illustrate.

Sensor problems generally are the following

In the pressure sensor maintenance work , through integration of data and found that the sensor problems generally are the following : 1 , base, and a lot of oil around the plate four weeks , thus causing the insulation effect is not ideal. 2 , the gap between the base plate and the other end of the small end large, this is because the sensor base of the following mill base circle , which has been subject to the impact of the role of the rolling force , no longer meet the installation requirements , when the level of the . 3 , after the sensor is removed , the same position that it has the appearance of a very severe wear , some have even been corrosion , so the force is no longer uniform . 4 , the west under the indenter roll the extent of damage severe than the east , the number was significantly higher , analyze the results that may be mill drive west end , so by rolling impact will be higher than the big east .
Respond to some of the problems above we generally there are several solutions. 1, from the rolling mill stand removed at Crankshaft Positioning Sensor base , and then measure the surface and the lower surface of the base circle , the horizontal and flatness must be measured. 2 , the lower plate below the increase in skin thickness of 0.6mm copper because of its good ductility , a level sensor is installed can have a certain compensation. The pressure test data show that the new added to the copper plate at certain positions of the indentation has one millimeter thick , and some of them have almost been pressed to wear , this description is not enough to force uniform . 3 , removeCoolant Temperature Sensor after the sensor , both the upper and lower plate and pad roughness , flatness , parallelism and geometry measurements , generally can be found in both the upper and lower platen plate precision installation requirements have been much lower than the . Only learn how to maintain mill pressure sensors, in order to make better use of rolling pressure sensor , the only way to make life more permanent , better service.

How to maintain the mill pressure sensor

Whatever the instrument used in a long time, the life expectancy would decline . Mill pressure sensor is no exception. Pressure sensors are very important element , which is detected when the mill rolling force , it is critical components. It is mounted on the roll , and each has one side . On the steel sheet surface by measuring the total pressure force, the detected differential pressure can truly reflect the fact on the steel sheet surface uniformity of the pressure . Because it is mounted under the roll , and the environment in which it has always been very strong vibration , humidity is very high and the temperature is high. Therefore, to maintain it becomes a very difficult thing , but expensive. Therefore, how well and how to maintain the reserve sensor is especially important parts .Crankshaft Positioning Sensor installation has the following technical requirements: the sensor should be installed in the roll head below the base , the above is of ninety millimeters thick are plate , and on top of it is on a 60 mm thick plate , the following part is the next fifteen millimeters thick pad . In fact , over Car Temperature Sensor plate with the following , both the base plate and the distance between the circumference of 1.5 mm. And there is a convex bottom base , which is embedded into the mill base inside . Both upper and lower pads, and the quality of some of the requirements of the platen . Heat treatment Hardness : HB320-360. Surface roughness of 1.6um; flatness 0.05mm; parallel is 0.05 .

Non-contact temperature sensor sensitive components in contact with the measured object and do not

Non-contact temperature sensor sensitive components in contact with the measured object and do not , also known as non- contact Thermometer . This Automotive Temperature Sensors is used to measure moving objects instrumentation , small target and heat capacity smaller or rapid temperature changes ( transient ) the surface temperature of the object , can also be used to measure the temperature of the temperature distribution . The most commonly used non- contact Thermometer Based on the basic law of blackbody radiation , called radiation thermometer tables. Including brightness radiation thermometry method ( see optical pyrometer ) , radiation ( see radiation pyrometer ) and colorimetry ( see colorimetric thermometer ) . Various types of radiation thermometry method can only measure the temperature corresponding to the luminosity , temperature or radiation colorimetric temperature . Only blackbody ( absorbs all radiation is not reflected light of the object ) is the real temperature of the measured temperature . To determine the true temperature of an object , it must be material surface emissivity correction . The emissivity of the material surface depends not only on temperature and wavelength , but also with the surface state , and microstructure of the coating , etc., and therefore difficult to accurately measure . In automated production method often requires the use of radiation to measure the temperature or the surface temperature control some , such as metallurgical rolling temperature of the strip , the roll temperature, the forging temperature, and a variety of molten metal in the smelting furnace or a temperature in the crucible . In these particular cases , surface emissivity measurement is rather difficult . For solid surface temperature automatic measurement and control, the use of additional mirror surface with the composition of the measured blackbody cavity . Additional effects of radiation can increase the effective surface to be measured and the effective radiated emission coefficient . By using effective instrument for emission coefficient measured temperature corrected accordingly , and ultimately obtain the true temperature of the measured surface . The most typical auxiliary reflector is hemispherical reflector . Coolant Temperature Sensor the center of the sphere diffuse radiation reflected back by the mirror surface of the hemispherical form additional radiation, thus increasing the effective emission coefficient of the formula: wherein ε is the emissivity material , ρ is the mirror reflectivity. As to the gas and the liquid medium to the real temperature radiation measurements, the heat-resistant material can be inserted into the tube to a certain depth to form a blackbody cavity approach. Obtained by calculation to reach thermal equilibrium with the medium after the effective emission coefficient cylindrical cavity . In the automatic measurement and control can use this value for the measured temperature at the bottom chamber ( ie, medium temperature ) is corrected to obtain the true temperature of the media .

Contact type temperature sensor and the measured object detecting portion has a good touch , also known as a thermometer

In recent years, the continuous development of science and technology , China's science and technology into the automation, digitization of the new field , which is used to place the temperature sensor a lot more . With the low-temperature technology in the defense engineering , space technology, metallurgy, electronics, food , pharmaceutical and petrochemical sectors and the wide application of superconducting technology research, measuring temperatures below 120K cryogenic thermometers have been developed , such as low temperature gas thermometer , steam pressure thermometer, acoustic thermometer, paramagnetic salt thermometer , quantum thermometer , low thermal resistance and low-temperature thermocouple and so on. Low temperature thermometer temperature sensing element requires small size , high accuracy , repeatability and stability. Porous silica glass using carburizing carburizing sintered glass thermal resistance thermometer is a temperature sensing element , for measuring the range of 1.6 ~ 300K temperature. Conductors of two different materials , such as connected to each other at a certain point , the connection point of heating in their unheated parts of the potential difference occurs . Pressure switch the value of this potential difference is not heated and the temperature of the parts of the measuring point , and the material on the two conductors . This phenomenon can be in a wide temperature range occurs , if the potential difference accurately measure , measure the unheated parts of the ambient temperature , heat spots can accurately know the temperature. Since it must have two conductors of different materials , so called " thermocouple ." Thermocouples made ​​of different materials used in different temperature ranges , they are also different sensitivity . The sensitivity of the thermocouple hot spot temperature is added 1 ℃ , the output variation of the potential difference . For most metal thermocouples supporting material is concerned, this value is about 5 to 40 microvolts / ℃ between . Crankshaft Positioning Sensor has its own advantages and disadvantages , which sensitivity is relatively low, the interference signal susceptible to environmental impact, but also susceptible to temperature drift of the preamplifier , therefore not suitable for measuring small changes in temperature. Since the thermocouple temperature sensor independent of the thickness of the material sensitivity , a very thin material can be made ​​of a temperature sensor . Also due to the production of metal thermocouple material has good ductility , this subtle temperature measuring element has a high response rate, can be measured rapidly changing process . Temperature sensor is a wide variety of the most commonly used variety of Cooling Temperature Sensor as a modern form of the temperature sensor was very small, so it is more widely used in various fields of production practices , but also for our life to provide a myriad of convenience and functionality . There are four main types of temperature sensors : thermocouples , thermistors , resistance temperature detector (RTD) and IC temperature sensor. IC temperature sensor also includes analog and digital outputs of two types. Contact type temperature sensor and the measured object detecting portion has a good touch , also known as a thermometer .

Tilt sensor on the railway bridge machine application

Railway bridge is a machine for railway bridge construction on the common construction machinery , railway bridge machine in the railway tracks on the road, will make the beams onto the bridge piers , and its main function is to beams filed after delivery to a fixed position down. Erecting machine work great mechanical strength , and every time you need to run a large number of objects and even large tonnage , erecting machine to be hanging beams through the bridge embankment on the bit , and take line high center of gravity and axle load , with the massive there may be roadbed and line quality is poor, such as the curved section outer rails high enough to cause the body tilt cause side friction is large , if the friction is more serious and may lead to unnoticed after overturning accident , the line will lead to uneven slope erecting machine slippery , making it appear forward phenomenon, coupled with factors such as human and prone to dangerous accidents to predict in advance , using the tilt sensor is a good solution Camshaft Position Sensor is used to specifically measure the tilt Cooling Temperature Sensor is able to measure the tilt angle of the object and bridges , real-time monitoring erecting machine tilt angle , and monitor the data transmitted to the control room, adjusted according to actual situation monitoring personnel working status , to security monitoring. Advantages of high-precision analog and digital Engine Coolant Temperature Sensor output single -axis output selectable multi-range selection, free custom enclosure rating high sensitivity, zero correction 40 ~ +85 ℃ temperature compensation module-level static, lightning protection, overvoltage protection, surge protection .

Summary of metal thermal resistance sensor applications

Thermal resistance meter is a metal thermal resistance typical applications of the sensor . RTD juice flow is based on the physics inside the medium made ​​of heat conduction phenomena . If the temperature T1 of the thermal resistance at temperature T2 into the medium , provided the thermal resistance in contact with the medium surface area A, the thermal resistance of the heat dissipation Q can be expressed in: Q = KA (T1-T2), formula , K is the thermal conductivity , or heat transfer coefficient . Experiments show that , K and medium density , viscosity, average flow rate parameters. When other parameters are constant , K- only medium is proportional to the average velocity . By measuring the thermal resistance of the heat dissipation Q can be measured the average velocity or flow medium . Thermistor sensor has a small size, fast response, high sensitivity , so it is widely used in many fields . Camshaft Position Sensor in industrial applications is very wide, depending on the product model, its scope is also not the same line , specifically the following aspects: Thermistor Temperature : As a thermistor temperature measurement sensors are generally relatively simple structure , the price cheaper . No outside protective layer thermistor can only be applied in a dry place ; sealed thermistor afraid of moisture erosion, can be used in a relatively harsh environment . Since the resistance of the thermistor sensor is large, so the connecting wires and the contact resistance of the resistance can be ignored , so Engine Coolant Temperature Sensor at the temperature up to several kilometers of distance measurement applications, multi-use bridge measurement circuit . The principle can also be used as the use of other temperature measurement and control circuit. Thermistor for temperature compensation of the sensor : ThermistorShaft Position Sensor in a certain range to compensate for certain components humidity . For example, moving coil meter moving coil header by the copper wire around the system . Temperature increases , the resistance increases, causing the temperature errors. And can therefore be of the moving coil circuit will be negative temperature coefficient thermistor manganese copper and then with the resistor in parallel with the series compensation components , in which to offset the error caused by temperature changes . In the transistor circuit , logarithmic amplifier , it is also composed of a thermistor compensation circuit used . Compensation due to temperature drift errors . Thermistor sensor overheat protection: thermal protection of direct indirect protection to protect profits . The small current case, the thermistor sensor can directly load string person , to protect the device to prevent overheating damage , for large current applications , can be used for the relay , transistor circuit protection. In either case, the thermal resistance of the device to be protected are close together , so that heat exchange between the full , the event of overheating , the protective effect of the thermistor . For example , the stator winding of the motor thermistor embedded in the mutant and in series with the relay . When the motor is overloaded, the stator current increases , causing fever . When the temperature is higher than point mutations , the current in the circuit can be within a few tens of milliamperes is mutated to tens of milliamps , the relay, in order to achieve thermal protection. Thermistor sensor for liquid level measurement : NTC thermistor sensor to put some heating current , its surface temperature will be higher than the surrounding air temperature, at which point it 's less resistance . When the liquid and higher than its installation height, it would take away the heat of the liquid , so the temperature drops , the resistance increased. Determine its resistance changes , you can know whether the liquid level is below the set value . Oil level in the tank car Automotive Temperature Sensors is produced using the above principle . Thermistor in the car is also used to measure the oil , the cooling water mixed with other .

Rocket technology sensor applications

Rocket launch is like a dragon is never caught not come, in fact, on the rocket in order to ensure safe flight of astronauts to provide accurate input data , the rocket on the various types of sensors , converters play an important role in sensor in the end what kind of role play it , and today China sensors trading network came to tell you about it. Various types of Automobile Temperature Sensor on the rocket , mostly installed inside the key parts of the rocket , they perceived the arrow on the physical changes responsible for the physical quantity conversion converter to achieve the transmission signal supplied to the control system of the rocket and ground control center as a basis to judge , like a change in both eyes fixed targets for the command center to provide a basis to predict . Speaking of rockets internal sensor , manifold variety. Working principle of a capacitive , resistive , optical type , indicators measured pressure, displacement , strain, physical monitoring the acceleration , position, temperature , noise, vibration , etc. aspects. Wide range of Camshaft Position Sensorin the rocket world, there are several categories is particularly important, it is a direct monitoring data reflect the status of the rocket is safe . Acceleration sensor lifesaving escape criterion for the rocket escape system provides important parameters , when the rocket a serious failure , endangering the safety of astronauts , it will show the acceleration deviation from the design value , the sensor will sense this change the first time , and issued signal initiates escape procedures to help astronauts quickly out of the woods . Using the system with level Automotive Temperature Sensors for measuring the remaining amount of propellant level measurement , real time, continuously , accurately provide information on the remaining amount of liquid propellant , controls the engine adjusting valve or open or closed , monitoring the flow of propellant mixing ratio of the engine keep tank oxidant , the mass ratio of the combustion agent is within the optimal range . Vibration and noise is the rocket invisible killer , though does not seem to explode so violently cruel, but the astronauts of the body is also very large destructive . In order to ensure the rocket during flight vibration and noise generated by the human body can not exceed acceptable levels , improve ride comfort of astronauts , rockets also set up a special monitoring vibration and noise of the sensor. Rumbling avalanche of orange flame , daring and took away all eyes , a small sensor on the huge rocket body seem insignificant , but they are protecting the safety of the astronauts unsung heroes in the thousands of degrees of broiled high stick to their posts , so vacated became an astronaut flying dragon tame car.

Subway environmental control systems widely used in temperature and humidity sensor

Metro has become an essential transportation in big cities run the tool , it has a large volume, punctuality is good, fast and safe , transport , high efficiency, environmentally friendly advantages. As subway passenger trips and more, how to give passengers a comfortable thermal environment satisfactory , becoming the transport sector needs to be considered and resolved. This requires careful design of the subway environmental control system in which temperature and humidity sensor detection tool is required . Metro 's large volume, which is a large passenger flow , the required variation in fresh air . Therefore subway air conditioning load changes, to achieve energy must resort to automatic control means. Automatic control system as an integral part of , environmental sensors in the subway more plays an important role . The environmental control system in the subway , the main use of the indoor Automobile Temperature Sensor and humidity sensor , duct temperature and humidity sensors . We can order at the station concourse and platform areas and other public areas as well as important equipment room set indoor temperature and Crank Position Sensors to monitor real-time temperature and humidity of the station . These parameters can help operational staff working conditions of various systems of the station to make reasonable adjustments to keep always in the public areas of the station more comfortable environment to ensure that the device has been in the right room temperature under . Indoor temperature and humidity sensors are generally mounted on the station concourse , platform and equipment room on the wall or on top . In the meantime, we can at the station 's new air chamber and the return air duct temperature and humidity chamber Engine Coolant Temp Sensor to monitor the outdoor air and the temperature and humidity inside the station . Environmental control system according to the data collected by sensors to determine the environmental quality of the station , and according to a variety of conditions pre-designed for automatic switch , automatic control system in order to achieve automatic control of the environment of the station , so that the station is always in a more environment comfortable environment, and ultimately achieve the purpose of energy saving and emission reduction . Pipeline temperature and humidity sensor is usually installed in the new and the return air plenum chamber walls. Thus, the temperature Crankshaft Positioning Sensor usefulness in life more and more, it is not only in the station , greenhouse , file management and food industry has applied , is now in the subway environmental control system has also been adopted .

Piezoelectric ceramic ultrasonic sensor working principle and structural characteristics

Ultrasonic sensors are developed from the use of ultrasonic sensor characteristics , because of its reliable, easy to install, waterproof , launch angle is small, high sensitivity , are widely used in liquid level monitoring, robot collision avoidance , a variety of ultrasonic proximity switches, and burglar alarm and other related fields. As we all know , is the production of piezoelectric ceramic Automobile Temperature Sensor probes commonly used materials . Here's a look at piezoelectric ceramic ultrasonic sensor working principle and structural characteristics . When a voltage is applied to the piezoelectric ceramics , piezoelectric ceramics will change with voltage and frequency mechanical deformation . On the other hand , when the vibration of piezoelectric ceramics , an electrical charge is generated . Using this principle , when given by the two piezoelectric ceramic or a piezoelectric ceramic and a metal sheet having a vibrator, the bimorph element , applying an electrical signal , it will emit an ultrasonic vibration by bending . In contrast, when applied to the bimorph element ultrasonic vibration , it will generate an electrical signal. Because of these effects , it can be used as a piezoelectric ceramic Crank Position Sensor . The ultrasonic sensor is a composite vibrator be flexibly fixed on the base . The compound of the resonator and the vibrator consists of a metal plate and a piezoelectric ceramic bimorph element consisting of a combination of the vibrator . Resonator flared aims to effectively radiate ultrasonic waves generated due to vibration , and the ultrasonic waves can be effectively central portion of the vibrator . Piezoelectric ceramic ultrasonic sensor uses a point to note is that in the high- frequency probe , you must use the vertical thickness vibration mode piezoelectric ceramic . In this case , the acoustic impedance of piezoelectric ceramic matches with the air becomes very important . Because the acoustic impedance of the piezoelectric ceramic 105 acoustic impedance of air , which will cause the vibration of the piezoelectric ceramic significant loss of radiation on the surface , then you will need to adhere to a special material on the piezoelectric ceramic Crankshaft Positioning Sensor , as acoustic matching layer , the air can be realized with acoustic impedance matched , so as to achieve the purpose of the measurement .

The method of the pressure sensor What impact

Pressure Sensors impact one way to do ? Pressure sensors used in many environments, some relatively poor environment , we generally have the following several ways to measure . The first method is to change the pressure transmitter chip , not an ordinary ceramic cores or diffused silicon core , but with strain gages , strain gauges is a strain on the DUT will be converted into an electrical signal of change sensitive device. It is a piezoresistive Cooling Temp Sensor of the main components . Resistance strain gauge is the most widely used metal resistance strain gauges and semiconductor strain gauges two kinds . Metal resistance strain gauges have filamentous strain gauge and the metal foil strain gages two kinds . The strain gauge is usually via a special adhesive binder tight mechanical strain is generated on the substrate , the force occurs when the substrate stress , the resistance strain gauge is generated with deformation, the resistance strain gauge is changed , so that the the voltage across the resistor changes . The strain gauge force generated when the change in resistance is usually small , it typically are composed of strain gage bridge , and through subsequent instrumentation amplifier is amplified , and then transmitted to the processing circuit . Strain gauge Crank Position Sensoris generally shock and impact resistance is better, but this sensor accuracy with their manufacturers . The second method is to use an ordinary ceramic Shaft Position Sensor or pressure sensor to measure diffusion silicon , but not be measured directly , but with the addition of a buffer tube , which also can measure the impact pressure . This method is economical , easy to install , so the application is very extensive. Regardless of the method is to measure the impact pressure sensor core body protection is not strong pressure washed out . Which method based on the specific use now have a bad environment and customer choice .

How to improve sensor performance

Sensors in the Chinese market, account for a large proportion of China's development has played a very important role , how to improve the performance of the sensor does , the problem to be studied , the following is to introduce you to . First, make a reasonable choice of materials and design Crankshaft Position Sensor selection of materials and structural design aim is to ensure that key indicators , secondary indicators required to give up , so cost-effective, while meeting the needs of measurement , do not blindly pursue high targets . Second, the average effect of using the average technical error and data averaging is typical application example , a common practice programs and how many times the sampling point measurements mean . Third, the use of differential technology can not only reduce the nonlinear differential technique , but also increase the sensitivity , offset the common-mode error . Differential technique commonly used in strain gauge , inductive and Auto Temperature Sensor . Fourth, compensation and correction techniques which not only through the use of electronic technology circuit ( hardware ) to solve, can also be used microcomputer via software. Fifth, in order to improve the stability ofCooling Temperature Sensor processing performance stability , should produce materials, components , and sensors necessary stability whole process . If the measurement higher, if necessary, also the need for an additional adjusting element , the key components of the circuit followed by the aging process . Six, shielding, isolation and interference suppression this method is mainly to weaken or eliminate the influence of external factors , and grounding or shielding of the sensor away from the power cable or the output wire shielded , twisted twisted together so the output line shielding, isolation , You can also filter and other methods can be used to suppress .

Temperature sensor

Automotive Temperature sensors are used to detect the engine temperature , suction gas temperature , cooling water temperature, fuel temperature and the catalyst temperature. Temperature sensor thermistor , RTD and thermocouple wire wound resistive three main types . These three types of sensors have their own characteristics , and its applications are also slightly different. Thermistor temperature sensor with high sensitivity , response is good, but poor linearity , adapt to the temperature is lower. Among them, the general-purpose temperature range of -50 ℃ ~ 30 ℃, accuracy of 1.5% , a response time of 10 ms; high temperature of 600 ℃ ~ 1000 ℃, accuracy of 5% , the response time is 10ms; wirewound resistive Camshaft Sensor accuracy is high, but the response characteristic difference ; thermocouple Engine Temperature Sensorsresistance , high precision measurement temperature range , but require treatment with the cold end amplifier together. Other practical products ferrite temperature sensor ( temperature range is -40 ℃ ~ 120 ℃, accuracy of 2.0% ) , metal or semiconductor film air Crankshaft Positioning Sensor ( temperature range is -40 ℃ ~ 150 ℃, Accuracy of 2.0 %, 5% , the response time of about 20 ms) and so on.

Non- contact temperature sensor

It can be used to measure the movement of objects , a small thermal capacity , a very rapid temperature change or a small target temperature of the surface of the object , but also can be used to measure the temperature distribution of the temperature inside . Measured object is saying there is no contact between the sensing element , so it also called non- contact Thermometer . Now the most frequently used non- contact Shaft Position Sensoris based on the basic law of blackbody radiation work , known as the radiation thermometer tables. Radiation thermometry method has the following categories: colorimetric , radiation and brightness of the Act . The above method can only measure the temperature of the corresponding colorimetric , photometric radiation temperature and temperature . However, only about blackbody temperature measurement is the real temperature.Non-contact temperature Crank Shaft Sensor measuring temperature main advantages : For temperatures above 1800 ℃ , generally using a non- contact temperature measurement method ; its measurement limit is not affected by temperature sensing element temperature limits the degree of Therefore the highest Car Temperature Sensor for the measurement , in principle, is not also limited ; infrared technology is now becoming more and more well, and the radiation temperature gradually from the visible to the infrared to expand , until room temperature is lower than 700 ℃ of which can be measured , and and its resolution is very high.

Contact temperature sensor

As part of this Cooling Temp Sensor between the measured object with a good contact, so again it is usually called a thermometer. It is by conduction or convection and thermal equilibrium state , it can be directly displayed value represents the case of the measured temperature of the object . Generally, it 's measurement accuracy is relatively high . Within a certain temperature , it is even able to measure the temperature inside the object of each case . However, if the measurement is the movement of objects , the heat capacity of small objects or small target, the measurement results will have a relatively large errors , frequent use of the thermometer with pressure thermometer , resistance thermometers , bimetal thermometers and glass liquid thermometers, etc.Crankshaft Positioning Sensor. They are in the commercial, agricultural and industrial applications are very wide , even in normal life , people often use these thermometers. In electronics, medicine, metallurgy , defense engineering and food sectors , cryogenic technology is widely applied , and there are strong research on superconducting technology , and now you want to measure the temperature of the low temperature below 120K thermometer has been well development , such as : acoustic thermometer, temperature heat thermometer , vapor pressure thermometer, gas thermometer and temperature and so on. Low temperature thermometer element to smaller size , better stability and reproducibility and accuracy is higher. Carburizing heat resistive glass using a porous sintered high-silica glass to form a low temperature carburization thermometer in one temperature sensing element , which can be used to measure 1.6 ~ 300K temperature within this temperature range .

Car in front of the sensor of the important work of the car

In front of the sensor as an important member of automotive sensors play an important role in this , understand the car in front of the sensor on our usual car , car repair is helpful to understand the structure and function of the sensor , then we will soon find the problem in a timely manner Update the front sensor is installed in front of the sensor the sensor and the fender rear bumper , for sensing a signal collision speed . Around the front structure of the same two sensors , Cooling Temperature Sensor are eccentric weight . Sensor mounted in a sealed box in front of the sensor vibration protection has four pins, of which two pins connected to the electronic controller , the other two for the self-diagnostic pin. Metal resistance is the role of diagnosis between the sensor and the central controller is in an open state or in the normal state. In front of the sensor working principle is: normal driving , the torsion spring hammer , moving contacts set at TDC position , the sensor does not trigger signal to the central controller . When the car crash , the inertia to overcome the spring force and torque to produce movement , driven contacts rotation, so dynamic and static contact engagement . In this case, the sensor to the central controller happen "on" signal,Coolant Temperature Sensorconnected , so electronic controller sends electric detonators detonated belt pretensioners instruction , so that the seat belt tensioner to achieve security role.

Temperature and humidity sensors to create a comfortable living environment perception

China South geographical differences, climate variability, usually urban residents are installed according to the season air conditioners, humidifiers and other equipment, office space in major cities is not uncommon, where temperature and humidity sensor is an integral part of the HVAC . Users usually in the living room watching TV, outside sky darkens, the wireless light sensor found in indoor light intensity drops below the threshold, according to the user's settings will automatically open the living room ceiling, and adjust the brightness of the dome light, so that light intensity indoors been maintained in a soft not to hurt the eye level. Summer and winter seasons, when it will always monitor the temperature and Cooling Temperature Sensor indoor temperature and humidity index, and linkage HVAC, humidifiers and other equipment, the indoor temperature and humidity maintained in a good range, if living in large cities, air quality there is a problem, the air quality sensor is equipped with a radio, with air purifier, so that the user in the room, it does not receive air pollution problems.

Pressure sensors used more widely , to quickly and efficiently select the appropriate pressure sensors

Pressure sensors used more widely , to quickly and efficiently select the appropriate pressure sensor , the need for their application to do a comprehensive understanding of the following is selected pressure sensor to consider when some parameters1, select the type of pressure measurement : There are several types of pressure measurements , absolute pressure , gauge pressure measurements, true gauge pressure measurements, differential pressure measurement . Absolute pressure measurement , refer to the absolute pressure measurements, ie relative to the vacuum pressure measurement . Refers to a gauge pressure measured relative to atmospheric pressure measurement , the actual ambient atmospheric pressure changes , so some seal an atmospheric pressure sensor as a reference , the reference pressure is not sealed with the outside atmospheric pressure changes Therefore, such a seal a constant reference Cooling Temperature Sensor are usually referred to as true form pressure sensor . Differential pressure measurement , refers to the two different media to measure the pressure difference between , two pressure ports it needs to pass different pressure medium 2 , select the appropriate pressure range and overload pressure range, the sensor pressure range is measured by the sensor pressure range , overload pressure is the pressure sensor to ensure proper operation and can withstand the maximum pressure value , the general pressure sensor overvoltage capabilities are in the measurement range of 1.5 times. Pressure sensor range to be higher than the maximum pressure range of applications , but not too high, if you select the higher range of the sensor , the measurement range of the sensor output signal change is smaller, measuring accuracy deteriorates.3 , select the appropriate pressure port, pressure port is to pass the path to the sensor medium pressure , the pressure interface material, usually ceramic , plastic, stainless steel , alloys, etc. , need to pressure medium without corrosive and choose different materials. At the same time the pressure interface also has a different shape , a shape and volume flush film formation , etc. If more viscous pressure medium , is recommended flush membrane interface, it is not likely to cause deposition of the media .4 , select the appropriate electrical connection, electrical interface is a sensor with an external circuit or system data communication channel, which needs to be considered is the sensor type and size of the supply voltage , the output signal type and connection methods. If the sensor is not added to the signal conditioning circuit , the output of Crankshaft Positioning Sensor based on different systems have different output signals, such as a voltage signal in mV , and changes in capacitance or electric signals , then the customer must choose the design of the signal processing circuit , the signal conversion the useful signal can be identified .5 , select the appropriate accuracy , different applications , the requirement of the measurement error is different , but the measurement accuracy is higher, the higher the cost of the sensor is often Therefore applications, not one-sided with high precision .6 , the temperature range selected sensor , the sensor usually changes with temperature drift , in order to achieve high-precision measurement ,Car Temperature Sensor usually have a temperature compensation function , the temperature compensation range , optimum measuring accuracy . In some high-temperature applications , because most of the electronic components can only work at 85 degrees or less , so you can choose not to bring the amplifier circuit temperature sensor will measure the signals from the high temperature zone and then diverted to the low temperature zone for signal processing .In practical applications , the sensor may also need to consider the resolution , the resolution is a pressure sensor to identify the minimum pressure range , with the development of sensor technology , the pressure sensor can identify the smaller , high resolution is required rate applications , the client can be considered without the sensor amplifiers , their choice performance amplifiers , the signal processing to achieve the minimum signal recognition .