1. 前言 从电子控制燃料喷射、速度警报和OK监控器等装置的实例,我们可以看到由于对汽车行驶性能、安全和排气性能要求的提高,控制装置更加复杂、精密,所以对电子传感器的需要近年来迅速地扩大。即有必要把温度、车速和发动机转速这类二种以上的条 1. Introduction From examples of devices such as electronically controlled fuel injection, speed alarm and OK monitor, we can see that the control device is more complicated and sophisticated due to the increasing demands on driving performance, safety and exhaust performance of the vehicle, so the electronic sensor The need has rapidly expanded in recent years. That is necessary to the temperature, speed and engine speed of such more than two kinds of articles