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Principle of pressure sensor
A pressure sensor is a sensor that converts pressure into a perceptible signal. The principle is to make use of the properties of material deformation. Sensors commonly used in automobiles include piezoresistive sensors and piezoelectric sensors.

Piezoresistive sensors make use of the relationship between resistance and pressure, when the pressure changes, resulting in a change in the resistance value, thus output a voltage or current signal. Such sensors are generally suitable for applications where a high degree of accuracy is not required.

The piezoelectric sensor generates an electric charge through the characteristics of the piezoelectric material to output a pressure signal. Piezoelectric materials have a piezoelectric effect, which produces an electric charge when subjected to external forces. This sensor has higher accuracy and sensitivity, and is suitable for applications where pressure accuracy is required.
Pressure sensor is widely used in automotive field. By using the principle of pressure sensors, we can monitor and control some important parameters in real time, thereby improving the performance and safety of the vehicle. In the future, with the continuous development of automotive technology, pressure sensors will also play an increasingly important role.