论文标题
使用点接触激发和检测方法，在压电陶瓷传感器中的多重损伤检测
Multiple damage detection in piezoelectric ceramic sensor using point contact excitation and detection method
论文作者
论文摘要
由于其较大的压电系数，铅锆酸钛酸钛酸[（ZRXTI1-X）O3]用于制造超声传感器，传感器和执行器。由于分层，腐蚀，巨大的温度波动等，导致其性能下降，导致了梯形钛酸盐（PZT）传感器中的几个表面和地下微缺陷。因此，有必要识别，定位和量化缺陷。非破坏性结构健康监测（SHM）是最佳和经济的评估方法。传统的超声SHM技术在空气和任何固体材料之间具有巨大的阻抗不匹配。而且大多数流行的信号处理方法仅在一个域中定义了时间序列信号，从而给出了优化结果。因此，已经实施了为了提高检测点接触激发和检测方法的准确性，以确定PZT中超声波与显微镜缺陷的相互作用。将HAAR离散小波转换（DWT）应用于从库仑耦合设置获得的时间序列数据。使用上述过程，直径高达100 UM的缺陷可以成功区分和局部。
Lead Zirconate Titanate [(ZrxTi1-x)O3 ]is used to make ultrasound transducers, sensors, and actuators due to its large piezoelectric coefficient. Several surfaces and subsurface micro defects develop within the Lead Zirconate Titanate (PZT) sensor due to delamination, corrosion, huge temperature fluctuation, etc., causing a decline in its performance. It is thus necessary to identify, locate, and quantify the defects. Non-Destructive Structural Health Monitoring (SHM) is the most optimal and economical method of evaluation. Traditional ultrasound SHM techniques have a huge impedance mismatch between air and any solid material. And most of the popular signal processing methods define time-series signals in only one domain which gives sub-optimal results. Thus to improve the accuracy of detection point contact excitation and detection methods have been implemented to determine the interaction of ultrasonic waves with microscale defects in the PZT. And Haar Discrete Wavelet Transformation (DWT) is applied to the time series data obtained from the Coulomb coupling setup. Using the above process, defect up to 100 um in diameter could be successfully distinguished and localized.
