Acceleration sensor and navigation safety systems of the body 's role

Acceleration sensors before entering the consumer electronics market , in fact, has been widely used in automotive electronics, mainly concentrated in the body control, security and navigation systems , typical applications such as automotive airbags, ABS anti-lock braking systems, electronic stability program ( ESP), electronically controlled suspension system . Currently safety body has been more attention, automobile airbag growing number corresponding to the sensor requirements are more stringent. The air bag control system including body outside of the impact sensor , placed in the doors, roof , front and rear seat positions, such as acceleration sensors, electronic controllers and airbags . Electronic controller is usually 16 or 32-bit MCU, when the body by the impact , the impact sensors within a few microseconds to send the signal to the electronic controller. Immediately followed by the electronic controller based on the intensity of the collision , the number of passengers and seat / seat belt position and other parameters , with Shaft Position Sensor  distributed throughout the car returned data to calculate and make the appropriate assessment and in the shortest possible time through electrical explosion drive to boot airbags ensure the safety of passengers . In addition to this important body safety system applications, the current acceleration sensor in the navigation system also plays an important role . Experts predict portable navigation devices (PND) will become a hot Chinese market , the main benefit of positioning GPS satellite signals . And when the PND into poor satellite signal reception area or the environment will be due to loss of signal, loss of navigation. MEMS-based 3 -axis accelerometer with gyro or electronic compass orientation and other components together to create a projection system , the GPS system to achieve complementary applications . The most common application Crankshaft Sensor Replacement is used to detect the acceleration and direction of the phone , while the phone when it is only by standing gravity , so many people put the acceleration sensor function is also called gravity sensing capabilities. Acceleration sensor 's strengths lie in the force measuring device . Yeah, but the device used to measure the position relative to the ground placed , then the accuracy is not high. Acceleration sensors can be used with a fixed reference coordinate system gravity , there is a linear or rotary motion tilting movement is limited , but a range of applications .