Acoustic Emission is a emerging dynamic non-destructive test technology. In present the normal method is to attach the PZT acoustic sensor on the vessel surface to examine the surface wavelet generated by the acoustic signal source. This type of sensor is volume large, band narrow, and only installed on the surface. For the dangerous environment such as the place with high temperature, nuclear radiation, it cannot be used. So PZT acoustic sensor has its limitations. In this paper, a Doppler laser vibration ...
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