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Study on Attenuation Properties of Surface Wave of AE Simulation Source Based on OPCM Sensor Element

机译:基于OPCM传感器元件的声发射模拟源面波衰减特性研究。

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It is of great significance to grasp the ultrasonic attenuation characteristics of materials for the nondestructive testing of materials. The dynamic properties of a piezoelectric composite material (OPCM) with self-developed transverse anisotropy have been analyzed using the experiment in this work. The OPCM sensor is attached to the surface of the iron plate and concrete structures to sense the surface waves generated by acoustic emission (AE). The experiment results show that OPCM sensor elements have unique advantages compared to piezoelectric ceramic materials (PZT). Further, by comparing the signals of isotropic and anisotropic materials, the attenuation characteristics of surface waves propagating in different materials are studied, and a new method for measuring the attenuation coefficient of surface waves is demonstrated.
机译:掌握材料的超声衰减特性对材料的无损检测具有重要意义。利用这项工作中的实验,分析了具有自行发展的横向各向异性的压电复合材料(OPCM)的动力学特性。 OPCM传感器连接到铁板和混凝土结构的表面,以感应声发射(AE)产生的表面波。实验结果表明,与压电陶瓷材料(PZT)相比,OPCM传感器元件具有独特的优势。此外,通过比较各向同性和各向异性材料的信号,研究了在不同材料中传播的表面波的衰减特性,并提出了一种测量表面波衰减系数的新方法。

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