超声波测距仪的设计与研究

Design and Research of Ultrasonic Rangefinder

该超声波测距仪以STC89C52为基本核心,通过测量超声波的信号发出和输入接收的一定时间差,结合超声波发射和接收时传播的速度获得测量距离。由于温度条件会直接影响超声波的传播运动速度,进而直接影响超声波测量的精度,因此在超声波测距仪中通过引入温度传感器做相应的温度测量和补偿。所提设计主要采用控制变量法,对不同条件下的超声波测量结果和实际距离进行误差分析,以便寻找影响超声波测量结果精度的主要原因。

The ultrasonic range finder uses STC89C52 as the basic core.It can measure the distance by measuring the time difference between the signal sending and receiving of the ultrasonic wave and the propagation speed when the ultrasonic wave is transmitted and received.Since the temperature condition will directly affect the propagation speed of ultrasonic waves,and then directly affect the accuracy of ultrasonic measurement,the temperature measurement and compensation are introduced by introducing temperature sensors in the ultrasonic rangefinder.This design mainly uses the control variable method to analyze the error of the ultrasonic measurement results and the actual distance under different conditions,so as to find the main reasons that affect the accuracy of the ultrasonic measurement results.