大量程超声波回波测距系统的研究  

Study of Long Distance Pulse Echo System with Ultrasonic Ware

作　　者：陈先中[1] 张争[1] 王伟 

机构地区：[1]北京科技大学信息学院测控系,北京100083

出　　处：《仪器仪表学报》2004年第z3期179-182,共4页Chinese Journal of Scientific Instrument

摘　　要：描述了超声波脉冲回波测距系统的基本组成;重点对大量程超声波发射电路进行了比较,提出了三种工业用大量程超声波测距系统的激励电路原理,并分析了电感瞬间放电法原理在大量程测距系统中的应用;设计了低噪声程控放大脉冲接收电路,实现大量程条件下信号的稳定接收;提出了在发射和接收电路之间设置“硬开关”和“软开关”的设计概念,彻底切断发射电路和其他回波信号对接收电路的干扰,提高回波信号的信噪比,实现大量程范围内距离的准确测量。最后,对智能回声接收软件的波形分析法进行了简单的介绍,并给出了一些智能化处理的实例。It described the basic parts of the long distance measurement of the pulse echo system, compared the principles of three kinds of the transmit circuits. The characteristic of the inductor instant discharging (IID) is analyzed within the application of three methods for the long distance ranging system. The low noise programmable amplifier circuit is designed, with the set of the hard and soft switch to cut the effect from the transmit circuit to the receiving circuit, to realize the long ranging system with high signal noise ratio. And the waveform of the pulse echo is discussed in the software of intelligent pulse echo treatment system, and the some examples of the echo analysis methods are presented in the software.

关 键 词：超声波 发射接收电路 大量程回波测距系统 

分 类 号：TH7-55[机械工程—仪器科学与技术]