【摘要】: 正1.引言脉冲回波方法(Echo-impulse Method)是近年来较为常用的现场吸声测量技术。依据其工作原理, 形成了几种不同的技术方案,所采用的脉冲声信号是不同的。
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用激光回波脉冲控制电子快门来操纵摄像机的曝光时间,是抑制背景噪声的一种有效方法。
Steering exposure time of a camera through control electron shutter with laser echo pulse is an effective method for inhibiting background noise.
回顾了泡沫夹层结构常用的无损检测方法:空气耦合超声方法、脉冲回波超声方法以及激光错位散斑干涉方法。
The popular non destructive test methods for the foam-cored sandwich structure are reviewed; including air coupled ultrasonic method, pulse-echo ultrasonic method and shearogragh method.
时间反转处理(trp)是利用这种聚焦特性的信号处理方法,它在水声通信、主动声纳检测这类脉冲—回波型领域的应用研究越来越受到重视。
Time Reversal processing (TRP) is a signal processing method based on the focusing property. It attached more attention in underwater acoustic communication, active detection and so on.
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