基于MSP430单片机的超声波倒车雷达系统设计  

Design of ultrasonic reversing radar system based on SCM MSP430

作　　者：陈希湘[1] 朱嵘涛[1] 王锦莉[1] CHEN Xixiang;ZHU Rongtao;WANG Jinli(Yangtze University College of Technology&Engineering,Jingzhou 434020,China)

机构地区：[1]长江大学工程技术学院,湖北荆州434020

出　　处：《现代电子技术》2021年第9期24-27,共4页Modern Electronics Technique

基　　金：湖北省高等学校省级教学改革研究资助项目(2017522);湖北省自然科学基金资助项目(2018CFB730)。

摘　　要：设计了一种基于MSP430单片机的高精度超声波倒车雷达系统,该系统采用MSP430G2553单片机作为核心控制元件,通过超声波在空气中的传播速度和从发射端到接收端的往返时间,计算得到车辆与障碍物的实际距离,并在OLED显示屏上进行实时显示。当障碍物与车辆左右两侧及车尾的距离小于设定值时,进行声光报警。测试结果表明,该系统较好地完成了距离的测量和报警功能,测量精度较高,所测距离绝对误差控制在±1.5 cm以内,最大的相对误差为1.14%,平均相对误差为0.68%。A high⁃precision ultrasonic reversing radar system based on SCM(single chip microcomputer)MSP430 is designed.In the system,SCM MSP430G2553 is taken as the core control element.The actual distance between the vehicle and the obstacle is obtained by the propagation speed of ultrasonic waves in the air and the round⁃trip time from the transmitting end to the receiving end,and is displayed in real time on the OLED(organic light⁃emitting diode)display screen.When the distance between the obstacle and the left side,right side and the rear side of the vehicle is less than the set value,a sound⁃light alarm will be given.The test results show that the proposed system can well achieve the functions of distance measurement and alarm.Its absolute error of the measured distance is kept within±1.5 cm,its maximum relative error is 1.14%,and its average relative error is 0.68%,so the system has high measurement accuracy.

关 键 词：超声波倒车雷达 MSP430 软件设计 测距 实时显示 声光报警 

分 类 号：TN95-34[电子电信—信号与信息处理]