MEMS accelerometers are dedicated to the safety of car owners

With the rapid development of the mobile Internet and the Internet of Things, the MEMS MEMS industry has ushered in significant development opportunities. In the field of active safety for cars that are committed to prevention, ESC (body stability system), ABS (anti-lock system), EPB (electronic parking system), TPMS (tire pressure monitoring system), etc. are key technologies in this field. The foundation of all these applications is inseparable from MEMS sensors. One of the long-term and friendly partners of Sensor Expert Network, Murata has developed its own fertile ground in the field of MEMS automotive sensors.

In 2012, Murata acquired Finnish VTI Technology and established MurataElectronicsOy, also known as MFI, with its unique market vision. MFI's products are used in automotive electronics: MEMS accelerometers, tilt sensors, gyro sensors, and gyroscope and acceleration combination sensors. These sensors are in line with AEC-Q100 standards, with high precision, high stability, high reliability, etc., especially in the ESC function involving car safety, Murata's sensor market share is nearly 50%.

For example, the main purpose of the ESC body stabilization system is to adjust the suspension system based on information such as driving speed, road conditions, steering conditions, shifting conditions, and different driving conditions to provide drivers with good operational stability and ride comfort. It can be said that the ECS system presents users with a variety of driving experiences from smooth soothing to high speed. Murata's MEMS accelerometers are designed, manufactured and tested in accordance with the reliability and stability requirements of the automotive industry. They have significant load capacity and very good impact resistance.

The MEMS accelerometer inside the ECS system can be used to detect the motion state of the vehicle body, and sometimes to detect the motion state of the front wheel in the vertical direction. Generally, two acceleration sensors for detecting the motion state of the vehicle body are installed near the front shock absorber and the spring top fixed point. The acceleration sensor near the hub is mounted in the vicinity of the shock absorber and the wheel spring. In this way, the vertical distance difference between the vehicle body and the wheel can be calculated from the measurement data of the two sets of sensors. In more advanced hub sensor systems, the acceleration sensor is replaced by a distance sensor for direct measurement of the distance between the wheel and the vehicle body.

In addition, in many ECS systems, an acceleration sensor for detecting vehicle bumps is additionally installed in the middle or rear of the vehicle. It is possible to slightly eliminate the tilt of the vehicle body during acceleration or deceleration.

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