JIAO Yang1, YANG Qing-xin1, LIU Shi-feng3, et al. Analysis of acoustic emission sensor considering coupling effect within double-direction[J]. 2007, (2): 40-42.
JIAO Yang1, YANG Qing-xin1, LIU Shi-feng3, et al. Analysis of acoustic emission sensor considering coupling effect within double-direction[J]. 2007, (2): 40-42. DOI: 10.13873/j.1000-97872007.02.013.
考虑双向振动耦合效应的声发射传感器的分析
摘要
由于声发射传感器属于低频超声传感器
其压电晶片工作频率决定了晶片的尺寸
使其不能简化为一维或二维弹性体来分析
考虑其径向和纵向振动不可忽视的耦合效应
借用表观弹性常数的定义
给出了短圆柱压电晶片包含直径和长度尺寸的频率方程。并根据频率方程制作了相应压电晶片
实验测试结果和理论预期相符。
Abstract
Acoustic emission(AE) sensor belongs to low frequency supersonic sensor.The work frequency of piezoelectric element of AE sensor determines its dimension characterstic.So it can’t be treated as one-dimension or two-dimension elastomer for analysis.Considering coupling effect within dametral vibration and vertical vibration
making use of difination of apparent elastic coefficient
the frequency equation of short piezoelectric column that contains diameter and length is presented.According to the equation
corresponding piezoelectric element has been made.Through experiment