摘要
根据超声波在一定距离内沿直线传播具有良好的束射性和方向性的特点,本文设计了超声波发射机和接收机。并分析了其工作原理,以及在车辆识别系统中的信号传输方法。
The transmitter and receiver of ultrasonic is designed by the ultrasonic characteristic of beeline transmitting in some distances and good bunchiness and direction. And then the working principle and signal transmission method in the vehicle identifying system are analyzed.
出处
《科技信息》
2008年第33期96-96,85,共2页
Science & Technology Information
