虚拟仪器技术超声波测距实现

Distance Measurement by Ultrasonic Based on Virtual Instrument Technology

基于数据采集卡和LabVIEW的虚拟仪器技术,采用超声波发射/接收模块,对发射波和回波脉冲信号进行采集和处理,根据超声波发射波与回波特征和采用可变阈值等较简单的方法,确定较准确的发射与回波时间点,获得较高的测距精度和测量稳定性,系统构造简单、算法简便。

Based on data acquisition card and LabVIEW virtual instrument technology, the transmitted and echo ultrasonic pulse signal was acuisited and processed by the ultrasonic transmitter/receiver module, through analysing the ultrasonic transmitted pulse signal and echo pulse signal＇s characteristics, and using variable threshold and other relatively simple methods, a more accurate launching and return time can be determined, and the distance measurement has a high accuracy and stability, the system＇s structure and its algorithm are simple and convenient.