Hall-effect speed sensor

Hall-effect speed sensor and crankshaft position sensor is a Hall effect using the signal generator. Hall signal generator mounted on the distributor, the distributor rotor coaxial with, the encapsulated Hall made ​​the whole chip and a permanent magnet fixed to the distributor Engine Coolant Temperature Sensor plate. Trigger several notches on the impeller and the same number of engine cylinders. When the trigger on the impeller blades into between the permanent magnet and the Hall element, Hall trigger blade magnetic field is bypassed, then no Hall voltage, the sensor has no output signal; when the trigger part into the gap on the impeller permanent magnet and between the Hall element, the magnetic field lines into the Hall element, the Hall voltage increases, the sensor output voltage signal

Air temperature sensor

When the engine coolant temperature exceeds 120 ℃, in order to protect the engine, make air conditioning stopped working. Air conditioning compressor refrigerant temperature is too high, the temperature switch will cut off the compressor electromagnetic clutch circuit. An evaporator installed in the center of the evaporator temperature sensor or temperature switch by controlling the operation of the air conditioning compressor to control the temperature of the evaporator. Evaporator temperature control is intended to prevent the evaporator frost. If the evaporator temperature is below 0 ℃, condensation surface of the water in the evaporator will frost or ice, in severe congestion evaporator air passage, resulting in significantly reduced cooling effect of the cooling system. In order to avoid frost evaporator, the evaporator temperature must be controlled at above 0 ℃. Evaporator temperature is too low, lower than the set value below 0 ℃, the air conditioning compressor electromagnetic clutch amplifier will cut off the circuit. Evaporator outlet Engine Temperature Sensors failure, can cause frequent air conditioning compressor clutch pull and separation. Between the expansion valve to the evaporator frost line will result in a small amount of air out of the wind

The first two oxygen sensors what role

Some cars are not there two oxygen sensors do. Those first two loaded catalytic oxygen sensor behind the play what role?For the final monitoring of pollutants in the exhaust gas is transformed completely. This is EOBD need.Generally, only need the first catalytic oxygen Crankshaft Position Sensor emissions requirements, but before the catalytic oxygen and aging , causing excessive emissions, after the passage of oxygen contaminant monitoring, one can know before oxygen and ternary catalytic aging, fine-tuning the control parameters, on the other hand can be applied to certain control strategy to eliminate its aging. Of course, if aging is too severe, after oxygen will send a signal to the ECU, the alarm!

What is the role of oxygen sensor

Capacitive sensors are theoretically achievable, but it is more specific trouble, first of all, you have to understand where you want to detect oil, along with the increase of its impurities change characteristics. With the increase in impurities in the oil, as the capacitor dielectric, causing changes in capacitance increase it? Is an impurity, the more the smaller the capacitor? Or more impurities greater the capacitance? How much capacitance or impurities have not changed much? Impurities, the more the greater the density? Impurities, the more the smaller the density? How many little change or impurities? Impurities, the more the greater the turbidity? Impurities smaller, the greater the turbidity? Or how many impurities turbidity change? Through the above analysis, you select one of the parameters for the measurement object, this parameter with the number of impurities were monotonic change obviously. Optional capacitor / density / Camshaft Positioning Sensor. I suggest you buy the above kinds of sensors were put on trial, the effect on the selection of which

The principle of magnetic sensors

The path of the magnetic field lines passing through the N pole of the permanent magnet rotor a stator and a rotor air gap between a rotor lobe and stator lobe air gap between the magnetic head a head-S a permanent magnet magnetic pole plates. When the signal rotor rotates, the air gap of the magnetic circuit will be changed periodically, through the magnetic circuit and the magnetic flux along Engine Water Temperature Sensor coil changes periodically. According to the principle of electromagnetic induction, inductive sensing coil will produce alternating electromotive force. Since the rotor lobe air gap between the magnetic head magnetic circuit and directly affect the output voltage level of the sensing coil, so the use of the rotor lobes and the air gap between the magnetic head can not be arbitrarily changed. Gap are subject to change, it must be adjusted according to regulations, the air gap is generally designed in the range of 0.2 ~ 0.4mm.

Magnetic induction sensor principle

The principle of magnetic sensors principle of magnetic Position Sensor magnetic field lines through the path of the permanent magnet N pole of a stator and a rotor air gap between the rotor lobes and the stator-rotor lobes a head gap between the magnetic head a magnetic board First S pole of the permanent magnet. When the signal rotor rotates, the air gap of the magnetic circuit will be changed periodically, through the magnetic circuit and the magnetic flux along the magnetic Camshaft Position Sensor coil changes periodically. According to the principle of electromagnetic induction, inductive sensing coil will produce alternating electromotive force. Since the rotor lobe air gap between the magnetic head magnetic circuit and directly affect the output voltage level of the sensing coil, due to

Differential transformer intake air pressure sensor

Differential pressure sensor is an open type magnetic mutual inductive sensorsSince a differential structure having two connected secondary winding , also known as a differential transmission. When the differential transformer primary coil is excited alternating power source , the secondary winding an induced electromotive force is generated . The secondary coils as the differential connection, the total output is the difference between the two coils induced electromotive force . When the core does not move when the total output of zero ; when the core moves , the output force varies linearly with the displacement of the core . Differential transformer intake Shaft Position Sensor detection and conversion process is: first pressure changes into the displacement of the transformer core , and then again by the differential transmission core displacement into an electrical signal output. This pressure Motor Sensors is mainly a vacuum diaphragm ( bellows ) , the differential transmission and other components. When the pressure changes , the bellows deformation differential transformer core drive movement , since the displacement of the core , the differential output of the transformer voltage is generated that is , this voltage is supplied to ECU after processing input. If the voltage level is determined in accordance with the time and make the injector spray job, you can determine the basic fuel injection quantity .

capacitive pressure sensor

First let us look capacitors. Capacity of the capacitor with a capacitance formed between the plates and relative dielectric effective area is proportional to the distance between the two plates is inversely proportional to C = ε A / d, where ε is the dielectric constant of the dielectric , A is both of the metal relative to the effective area between the electrode plates , d is the distance between the two metal electrode plates . From this relationship can be seen, when the two parameters constant , and the other parameter as a variable , capacitance will vary with changes in parameters . Capacitive pressure Coolant Temperature Sensor is placed in the cavity by the two movable piece ( flexible metal diaphragm ) , two fixed pieces ( elastic diaphragm concave metal coating on the glass ) , the output terminal and the housing and other components. The movable piece is formed between the two fixed pieces of two capacitors in series . When the intake pressure force is applied to the elastic diaphragm , a flexible diaphragm is displaced , it is bound with a fixed slice distance decreases , while increasing the distance with another set piece ( can be a piece of paper to demonstrate ) . We can see from the formula , the distance between the two metal electrode plates is an important factor affecting the capacity of power , the distance increases , the capacitance is decreased , the distance is reduced, the capacity increases. This is measured by the amount of a sensing component parameters cause two equal , opposite changes in structure called a differential configuration . If the elastic membrane is placed between the side of the pressure and the atmospheric pressure ( the upper chamber through flexible diaphragm
Atmosphere) , a gauge pressure measured ; if the elastic membrane is placed between the vacuum pressure and by the side ( the upper chamber through the elastic diaphragm vacuum) , the measured absolute pressure . Used in conjunction with the capacitive Camshaft Sensors measuring circuit there are many, here we come to the bridge circuit as an example the differential capacitive Sensor Camshaft circuit works , as shown , since the capacitor is AC parameter, so the bridge through a transformer with AC motivation. Two coils of the transformer and two capacitors bridge, when there is no inlet pressure , the bridge is in equilibrium , the two values ​​are equal and the capacitance C0, when a pressure is applied , one of the capacitance value C0 + △ C, other a capacitance value C0-△ C, (△ C as an external pressure caused when the amount of change in capacitance value ) , then the bridge out of balance , where the high voltage capacitance is high , the two capacitors of the voltage difference between , whereby the bridge representative of the intake pressure generated output voltage U.

automotive sensors - resistive sensor

Resistive sensor is to be measured, such as displacement, strain, force, acceleration, humidity, temperature, and other such physical quantity conversion formula into a resistance value of such a device. There are resistance strain, piezoresistive, thermal resistance, thermal, gas, humidity and other resistive sensors.Automotive Sensor Camshaft - resistance strain sensorThe resistance strain gauge sensor with metal strain effect, that produces mechanical deformation under external force, so that the resistance value corresponding changes ensued. Resistance strain gauges are mainly two types of metals and semiconductors, metal strain gauge metal wire type, foil, film type of the points. Semiconductor strain gauge with high sensitivity (typically wire type, foil several times), transverse effect is small.

Automotive Sensor - Sensor resolution

Resolution of the sensor is likely to be felt by the measured minimum change. That is, if a non-zero value from the input changes slowly. When the input changes value does not exceed a certain value, Crankshaft Position Sensor  output does not change, Motor Sensors input volume changes are indistinguishable. Only when the input resolution of the amount of change over time, the output will change.
Usually the sensor full scale range of each point is not the same resolution, so commonly used in the full-scale output can generate a step change in the maximum amount of input change value as a measure of resolution indicators. If using these indicators expressed as a percentage of full scale, it is called resolution.

Automotive Sensor - Sensor concept

The main function of the sensor is the non-electrical signal into a power signal, or physical, power, chemical quantity of information is converted into an electrical control unit (ECU) signals can understand. For automotive engine control system, sensors Engine Coolant Temperature Sensor, air flow sensors, pressure sensors, speed and position sensors, oxygen sensors, knock sensors.

Automotive Sensor

Automotive automotive sensor input device of the computer system, that the car is running in a variety of conditions information, such as speed, temperature of various media, such as engine operating conditions, lose electrical signals into the computer so that the engine is in the best working state. Vehicle many sensors, sensors to determine when a failure occurs, should not only consider the sensor itself, but should be considered faulty circuit as a whole. Therefore, when troubleshooting, in addition to Cooling Temp Sensor, should also check the wiring harness, connectors and sensors and electronic control unit between the relevant circuits. Automotive electronic control devices are widely used, each electronic control devices including sensors, electronic control unit, the executing agency of three parts. It is the use of sensors to monitor the working conditions of vehicle-related assembly, and the relevant information to the electric element, electronic control unit through the analysis, calculation, judgment, to send commands to the actuator, so that the working conditions of the relevant assembly to achieve the best . Automotive parts Shaft Position Sensor is sensing an important electronic device configured with the car getting higher and higher, the development of automotive sensors and more advanced.

The working principle of classification according to the sensor

This is the most common classification sensor, this classification will be physics, chemistry, biology and other disciplines principle, rules and effect as a basis for Car Sensors, help explain the working principle of the sensor and the sensor in-depth research and analysis, but Depending on the application the user is not easy to choose.
Sensor works according to Engine Water Temperature Sensor can be divided into electrical parameter sensors (including resistive, inductive and capacitive sensors), piezoelectric sensors, photoelectric sensors (including general photoelectric, fiber type, laser type and infrared type sensors, etc.), thermal sensors, semiconductor sensors, and radiated wave sensors. Most of these types of sensors respectively, based on their respective physical effect principle named.

Solid-state thermal sensor

The simplest is a semiconductor PN junction temperature sensor, such as a diode or transistor base - emitter Crank Position Sensors. If a constant current flow through the forward biased silicon PN junction forward voltage drop in temperature every 1 ℃ will reduce 1.8mV. Many semiconductor IC use this feature to measure temperature, including Maxim's MAX1617, National Semiconductor LM335 and LM74 and so on. Semiconductor sensor interface forms, from the voltage output to the serial SPI / micro-wire interface can be. Many different types of temperature sensors, through Car Sensors choice of software and hardware, will be able to find a suitable application of the sensor.

Coolant temperature does not reach and stable operation

Generally, automotive coolant temperature of about 90 degrees is optimal normal engine operating temperature. (Individual brand models sometimes differSamples). Buick 1.8 coolant Positioning Sensor does not reach failure and stabloperationindicating that the coolant temperatureistoolow.CausingcoolantCar Sensors Probably too low a relationship with the thermostat. Explain here, theroleofthethermostat: Changing the scope of the water cycle to regulate cooling systemCooling capacity, ensure the engine at a suitable temperature range. Because there is a largeengine cooling cycles and small cycles. If you say that the thermostatIs broken, and we have a large circulation cooling, it is very difficult to raise the water temperature to the engine Crankshaft Sensor stable operation

Method coolant temperature sensor

EFI car idling occurs when too high, too low, or dilute mixture of black smoke, bad cold engine failure, etc., we often think about the water to be measuredTemperature sensor, the sensor is installed in the engine water on the road, its internal structure is generally used negative temperature coefficient thermistor, the electricResistance will vary with the water temperature, water temperature rises resistance decreases, the resistance value of the resistor and the computer board internal temperature in series form letterRoad side, the side of the open circuit voltage between 4.7V-5V in general, old-fashioned computer board also useful for the 12V. With the change in the voltage value of the thermistorChange, the smaller the lower the voltage resistance, the use of this principle the temperature of the cooling water put into electrical signals supplied to the computer board, as the controlSystem according to engine temperature correction fuel injection, ignition timing and other control parameters of the main basis. Check Engine Cooling Temperature Sensor can be used inRoad and open circuit detection. 1, the road detection method: temperature sensor plugs are generally two lines, one is the signal return line blacksmithAnd the other is the signal line, first unplug the sensor plug, turn the ignition switch, the digital multimeter pen were inserted into two tables unpluggedPlugs at both ends, is displayed on the multimeter voltage should be between 4.7-5.0V, showing negative, interchangeable table pen, if there is no voltage or veryLow, check the wiring and computer board signal terminals are normal. Signal voltage is normal, plug it back in the plug, this voltage is decreased, then startDynamic engine operation, the voltage was observed with different temperature, the higher the voltage the lower the temperature, the higher the temperature the lower the voltage. If this is, Which can be considered the sensor is good. 2, open circuit detection method: Turn off the ignition switch, unplug Engine Temperature Sensor plug from the engineRemove the sensor with a digital multimeter electrical measuring sensor group files between two terminals and case resistance, the resistance should be as megohms or more. With a wildcarTable measuring sensor resistance between two terminals should have 20 kilohms or less resistance values, the water Engine Temperature Sensor probe is placed in a container filled with hot wateBrowser, the resistance varies with temperature, several commonly used models listed below coolant Auto Temperature Sensorresistance and temperature mapping table for reference

Test for most vehicles.

Optical fiber temperature sensor works

When the temperature changes will change the light propagation speed in the substance, that is, the time when the Crankshaft Sensors in the refractive index of the optical path changes, the optical path at this time will generate a shift end position, measurements can be calculated based on material properties the temperature

Automobile exhaust gas temperature sensor (Ex-haust Air Temperature Sensor, EATS)

EXSENSE EXSENSE electronic car washed with NTC Thermistor / Temperature Sensor Temperature sensor detection method:
The temperature Cooling Temp Sensor are commonly used thermal resistance, thermocouple, thermal ferrite type, transistor type, integrated, etc. 5. With the development of automotive electronic control technology, temperature sensor applications more widely, for example, coolant Shaft Position Sensor, air temperature sensor, transmission oil temperature sensor, exhaust temperature sensor (catalyst temperature sensor), EGR monitor the temperature sensor, outside temperature sensor, vehicle temperature sensor, temperature sensor sunshine, evaporator outlet temperatureCrankshaft Position Sensor , thermal switch.

The temperature sensor is how the application to the motor to control the motor start and

stopThermocouple Coolant Temperature Sensor are generally type, directly to the input of the controller can be, the controller can buy a digital model is about more than one hundred pieces of it, the above temperature calibration can be performed, you can set the temperature control point, see the instructions to the controller generally has one or two pairs of independent contacts (normally open and normally closed), contactor coil power supply via the contact temperature controller, you can control the motor, if you use motor is a single-phase power is relatively small, or even directly to the power supply via a temperature controller contacts powering the motor.

Motor bearing temperature sensor basic technical parameters

※ sensor body is IP54 enclosure protection
※Map Sensors for the continuous duty (S1)
Name: sensor
Current :4-20mA
Voltage :18-24V
Measuring range :0-200 ℃
   WZD series of temperature sensors (please contact: 152 1537 Guang Jia Wei 7753) is designed for measuring bearing temperatures (also measurable solid, liquid, gasTemperature) temperature sensor, the measurement Pt100 platinum resistance element is configured properly Thermometer, you can monitor the bearing temperature can be achieved atAlarm and control.

Motor comes with a temperature sensor

General 220V motor or Auto Temperature Sensor controller is loaded in the PTC element, this element of the bundle of the stator winding bridge line, the temperature generally choose 60 °, the motor winding temperature of the element exceeds this value automatically disconnected, and then lead wire connected to the control circuit, the implementation of effective protection, but did not find large motors installed, because the general has a thermal relay in a circuit to do protection, motor overload protection when the delay period, if you installed him, and occasionally a pulse will cause the Motor Sensors is stopped, the motor does not actually affect the normal operation of the circuit in a complete chain of effects will cause more harm than good. If you want the motor temperature monitoring, testing facilities can be Hotbox.