随着电子技术的发展,汽车电子化程度不断提高,通常的机械系统已经难以解决某些与汽车功能要求有关的问题,而被电子控制系统代替。传感器的作用就是根据规定的被测量的大小,定量提供有用的电输出信号的部件,亦即传感器把光、时间、电、温度、压力及气体等的物理、化学量转换成信号的变换器。传感器作为汽车电控系统的关键部件,它直接影响汽车的技术性能的发挥。目前,普通汽车上大约装有10—20只传感器,高级豪华轿车则更多,这些传感器主要分布在发动机控制系统、底盘控制系统和车身控制系统中。 With the development of electronic technology, the electronic level of automobiles is constantly increasing. The usual mechanical systems have been unable to solve some of the problems related to vehicle functional requirements, and have been replaced by electronic control systems. The function of the sensor is to quantitatively provide a useful electrical output signal according to the size of the measured object. That is, the sensor converts the physical and chemical quantities of light, time, electricity, temperature, pressure and gas into signals. Sensor as a key component of automotive electronic control system, it has a direct impact on the technical performance of the car. At present, there are about 10-20 sensors in common cars and more in luxury sedans. These sensors are mainly distributed in engine control systems, chassis control systems and body control systems.