基于STC89C52RC的超声波测距系统设计

Ultrasonic ranging system reversing

本文介绍了一种基于STC89C52RC的超声波测距系统的工作原理及其硬件组成和相应的软件流程。硬件系统由脉冲发射电路、接收电路、温度补偿电路和相应的控制电路组成。软件部分采用单片机C语言程序编程,主要由键盘扫描、定时器/计数器初始化、超声波发射子程序、中断服务子程序和LED动态显示子程序构成。同时,为了提高超声波测距精度,采用温度传感器进行环境温度检测,对超声波的传播速度进行校正。实测证明,系统具有较高的测量精度和较强的适应性。

This paper introduces a single-chip-microcomputer STC89C52RC control system for ultrasonic ranging system and the hardware circuit and the software flow chart of the control system. This hardware includes a pulse transmitter, a receiver, a temperature compensating circuit and related control logic. And the software is composed by keyboard scan, timer or counter initialization, sending ultrasonic subprogram, interrupt service routine and dynamic display subprogram. At the same time, in order to improve the accuracy of the ultrasonic range system that the temperature and correct the speed of the ultrasound. The measure results show that the system can obtain higher precision and better adaptability.