Traditional elastic strain sensor
This kind of sensor is characterized by wide measurement range, high precision, good stability, and long service life. It can resist the influence of high temperature, high speed, high pressure and vibration, so it is more suitable for the detection environment of automobiles. The strain gauge sensor is usually composed of four bridge resistances. The opposite group of bridge arm resistances produce tension changes when they are under pressure, while the other produces pressure changes, which affect the resistance and the magnitude of the signal. Equal and opposite in sign, increasing the sensitivity of the sensor. The output signal amplitude of this kind of sensor changes little. In the case of severe temperature environment changes, temperature compensation is required, but it is difficult.