Theoretical and experimental analysis of acoustic emission signal for resonant sensor on homogenous material
Theoretical and experimental analysis of acoustic emission signal for resonant sensor on homogenous material
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DOI：
10.1016/j.sbsr.2023.100550
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发表时间：
2023-01
影响因子：
5.3
通讯作者：
T. Khan;A. A. Rashid-A.;Tokumaru Nanami
中科院分区：
文献类型：
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作者：
T. Khan;A. A. Rashid-A.;Tokumaru Nanami
对声发射谐振传感器的声发射信号进行了建模。对于表面载荷，本文针对两种均质材料开发并模拟了声发射 (AE) 信号的生成。在类似的考虑下，通过执行AE模型实验验证了模拟结果。铝和钢被选为建模和实验的波传播介质。源点处的正弦负载已由函数发生器实现。压电 AE 谐振传感器用于收集由于材料表面上的垂直载荷而产生的垂直响应。它将AE波的动态位移转换成电信号。作为传感器的传递函数，AE 传感器 (R15α) 的传感器灵敏度特性已被计算并纳入模型中。金属表面和传感器的声阻抗已用于确定由于信号从传感器传输到材料而产生的传输损耗。对于实验和模拟 AE 波，均评估了上升时间和最大幅度，并进行了信号参数表征。为了验证所提出的模型，已经确定了最大幅度的衰减特性以及随着源到接收器距离的增加而增加的上升时间。
The modelling of AE signal has been conducted for AE resonant sensor. For surface loading, the generation of acoustic emission (AE) signal has been developed and simulated in this paper for two homogenous materials. The simulated results have been verified by executing AE model experiments under similar considerations. Aluminum and steel have been selected as the wave propagation media for both modelling and experiment. A sine load at source point has been implemented by a function generator. A piezoelectric AE resonant sensor has been utilized to collect the vertical response due to the vertical load on the material surface. It converts the dynamic displacement of the AE wave into electrical signal. As the transfer function of the sensor, the sensor sensitivity characteristics of the AE sensor (R15α) has been calculated and incorporated in the model. The acoustic impedance of the metal surface and sensor has been utilized to determine the transfer loss due to the signal travelling from the sensor to the material. For both the experimental and simulated AE waves, the rise time and the maximum amplitude have been evaluated and the signal parametric characterizations have been performed. The attenuation property of maximum amplitude and the increase of rise time with the increment of source to receiver distance has been determined for the verification of the proposed model.