摘要
利用ATMEL公司的AT89C51单片机接收超声波传感器的测距信号,根据超声波测距原理,将实时信号送给单片机,单片机实现距离的计算、显示、报警,当在探测范围内有障碍物时,并且障碍物的距离小于报警距离时,发光二极管以一定频率闪烁,同时蜂鸣器提示报警,并显示障碍物的距离。经验证,此系统实现了超声波倒车防撞系统各功能,且该系统实时性较稳定,误差距离比较小。
This design uses AT89C51 from ATMEL company for receiving distance-measurement signal of the ultrasonic sensor,thus implementing the ultrasonic back-draft anti-collision system.With ultrasonic distance-measurement,the real-time signal is transmitted to the microcomputer,and the microcomputer thus completes the computing,displaying and alarming.When barrier is located in the detecting range,and the barrier＇s distance is less than alarming distance,the led tube would flash with certain frequency,while the buzzer would alarm,showing the distance of the obstacle.The experiment indicates that this design could implement various functions of ultrasonic back-draft anti-collision system,and the realized system is strong in real-time performance and small in erroneous distance.
出处
《通信技术》
2011年第2期130-132,共3页
Communications Technology
关键词
超声波传感器
单片机
测距
ultrasonic sensor
microprocessor
distance measurement
