收发同体型超声测距系统设计

Design of ultrasonic distance measuring system with transmitting-receipting sensor

介绍了一种收发同体型超声测距系统。该系统由发射电路、前置放大电路、滤波电路、AGC、整形电路和单片机控制器等组成。前置放大器由音频功放LM386组成。另外,对数据的采集和处理采用了反射波峰值检测法,取得了良好的效果。

An ultrasonic distance measuring system with a transmitting-receipting sensor is introduced.It consists of transmitting circuit, preamplifier, filter, AGC, shaping circuit and MCU, etc.The preamplifier consists of the audio-frequency power amplifier LM386.Moreover,a method of detecting reflected peak value is used on data collecting and processing good results have been achieved.