高精度超声波测距系统

本设计硬件部分采用单片机AT89C2051做CPU主控制,电路主要由发射电路,接收电路和显示电路几部分组成.本文详细介绍了各部分电路的工作原理.本系统利用超声波传感器实现无接触式空气测距,并充分考虑到测量环境温度对超声波传递速度的影响,通过温度补偿的方法对传递速度予以校正,而且可以马上检测声波在现场的传播速度并被采纳,因此具有非常高的测量精度,能实时地将测量数据上传给PC机,具有硬件结构简单、工作可靠、测量误差小等特点,现该产品已经被上海造纸机械电控技术研究所采用,已用于造纸设备的复卷机的旋转辊的位移检测上,实践证明效果很好,达到了他们所提出的各项指标.

A High Precision Ultrasonic Telemeter System

Hardware of this design adopts single-chip AT89C2051 as main control. The circuit is consisted of transmitting circuit, receiving circuit and displaying circuit. This paper expatiates the working principle of all the parts of the circuit. The system with a ultrasonic sensor realize no contacted.air distance, measurement and it considers fully of the effect which is caused by the different speed with the different temperature.The transfer speed is rectified by the method of temperature redeeming.So the system has high measurement precision, and it has characteristic of simple hard ware makeup,credible working,less error measurement and etc.