摘要
分析超声波的测距原理。为提高发射强度和接收抗干扰能力,设计了推挽式超声波发射驱动电路和锁相环接收电路。以单片机进行计时、控制和运算,实现了距离的显示和当距离小于设定值时的报警功能。实际应用表明,测量准确、性能稳定,提高了倒车的安全性。
The principle of using ultrasonic distance measurement is analyzed. In order to raise emisson intensity and anti-jamming capability of receiving signal, the push-pull-drive launch circuit and PLL receiver circuit are designed. A microprosessor-core measuring time, control and calculation, realized a distance display and alarm when the distance is shorter than setting. Practical aplication shows that measurement accurate, performance stable, reversing increased security.
出处
《仪表技术》
2008年第4期8-9,12,共3页
Instrumentation Technology
关键词
超声波
发射与接收
单片机
测距
ultrasonic
launching and receiving
microprosessor
distance measurement
