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中文摘要：
设计了一种接触式声发射传感器，详细介绍了压电晶片、背衬、声匹配层以及前置放大器对声发射传感器灵敏度、分辨率、信噪比等指标的影响。利用阻抗分析仪对声发射传感器的输入电导进行了测定，结果表明声发射传感器设计方法可行。
英文摘要：
The design of a contact PVDF acoustic sensor is described in this paper, including the operating principle and the structure of the sensor, and the influence of backing material, acoustic matching layer and pre-amplifier on the sensitivity, resolution and signal to noise ratio （SNR） of the sensor. The sensor has been calibrated using a precision impedance analyzer, by which the parameters of the acoustic sensor have been obtained. Test result shows that the design method is acceptable.
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