基于P89LPC932超声波测距仪

为了克服一些传统距离测量方式在某些特殊场合无法测量的缺陷，设计以P89LPC932为核心，利用超声波传感器实现了无接触式空气测距的方法，充分考虑声速与温度的密切关系，进行温度补偿，进一步获得测距最远700cm左右，精度最优达到1％。该设计具有较强的抗干扰能力，安装简单，体积小，功耗低，便于嵌入其他系统的特点。

Design of Ultrasonic Rangefinder Based on P89LPC932

In order to overcome defects of some traditional distance measurement methods can＇t he measured in some special occasions, a non-contact air measurement method is realized by use of an ultrasonic sensor based on P89LPC932. The design performed temperature compensation based on the close relationship between velocity and temperature to further gain measurement distance about 700cm, optimal precision at 1%. This design has some features such as strong anti-jamming ca pability, simple installation, small size, low power consumption, and it is easy to be embedded to other systems.