摘要
对被测介质中存在的异常体波幅比声速反应更灵敏 ,但应用波幅必须保持换能器耦合的一致性。讨论了异常体在有效接收声场不同部位时 ,波幅及声时的变化 ,并用模型及工程测试结果说明了波幅在超声检测中的作用。
Wave amplitude is more sensitive to defects existing in medium than wave speed. However, the coherence of coupling is very important to use amplitude. This paper dicusses changes of amplitude and travel time of wave when the defectis in different part of the effective sound field of receiver. In addition, it explains how to use amplitude in ultrasonic testing on models and field structures.
出处
《矿产勘查》
2000年第8期9-12,共4页
Mineral Exploration
关键词
换能器耦合一致性
发射声场
有效接收声场
coherence of coupling,sound field of transmitter,effective sound field of receiver
