摘要
双踪示波法是测量声速的一种新方法 .它利用示波器的双踪功能 ,以发射信号的波形为参考对象 ,与接收信号波形直接进行比较 .当连续单向移动接收换能器时 ,可观察到发射信号的波形与接收信号波形发生多次重合现象 .连续两次重合图象所对应的位置值之差就是我们所要测量的波长值 .双踪示波法不仅适用于测量声波在空气中的传播速度 ,同样也可以用于测量声波在液体中的传播速度 .
Twin-complex oscillometry is a new method,which can for measuring supersonic velocity. Where the twin-complex function of oscillograph is used. With the sent signal wave chosen as the reference object, it can be compared directly with the receptive signal by twin-complex oscillograph. The phenomenon that the receptive signal wave is surperposed with the transmitted signal wave when the receptive equipment is moved continuously along a single direction. The position dispersion of two continuous wave superposition is the wave-length of the sonic velocity. Twin-complex oscillometry can not only be applied to supersonic velocity in the air, but also it can be used for supersonic velocity measurement in all kinds of liquids.
出处
《西安建筑科技大学学报（自然科学版）》
CSCD
2004年第3期375-378,共4页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
西安建筑科技大学 2 0 0 4年度实验技术研究基金项目 ( 0 40 1)
关键词
超声波
声速
双踪示波法
supersonic wave
sonic velocity
the twin-complex oscillometry
