基于数字存储示波器的超声多普勒效应实验系统的研究与应用

Research and practice on the ultrasonic Doppler effect experimental system based on digital storage oscilloscope

介绍了一种基于数字存储示波器的超声多普勒效应实验系统.该系统利用现有的超声声速测量设备,以频移信号处理电路和数字存储示波器作为数据测量单元的核心,通过与系统底座和运动控制单元相配合,开展与多普勒效应相关的多项综合性、设计性实验.实验中信号的转换、传输和处理过程清晰透明,有利于培养学生的自主动手能力和观察分析问题的能力.该实验系统结构简单,无需复杂的软件编程,各实验室均可自行完成制作,同时又可实现实验资源共享,提高仪器设备的利用率,具有较高的实用和推广价值.

An ultrasonic Doppler effect experimental system based on the digital storage oscilloscope is intro- duced. This system uses the existing ultrasonic sound velocity measurement equipment. With the shift signal pro- cessing circuits and digital storage oscilloscope as the data measurement unit core, and through coordinating with the system base and the movement control unit, a number of integrating and designing experiments related to the Doppler effect can be carried out. The students＇ understanding to Doppler effect and it＇s application can be deep- ened. The conversion, transmission and processing of signals in the experiment are clear and transparent, which will help in-depth to train students＇ abilities in autonomous practical and observing and analyzing problems. With- out complex software programming, the experimental system is simple and every laboratory can complete it on their own production, at the same time, the experiments can realize the sharing of resources, improve the equipments＇ utilization with higher value of practical utility and promotion.