The design and calibration of particular geometry piezoelectric acoustic emission transducer for leak detection and localization
The design and calibration of particular geometry piezoelectric acoustic emission transducer for leak detection and localization
复制标题
DOI：
10.1088/0957-0233/24/9/095103
复制
发表时间：
2013-09
影响因子：
2.4
通讯作者：
Hazim Yalcinkaya;D. Ozevin
中科院分区：
文献类型：
--
作者：
Hazim Yalcinkaya;D. Ozevin
使用声发射（AE）方法的管道泄漏检测需要响应于较少衰减和分散的波运动的高灵敏度换能器，以便以可接受的方式放置离散换能器间距。本文介绍了一种新的压电换能器的几何结构，由PZT-5A制成，以增加传感器的灵敏度的切向方向。在频域中对换能器几何形状的有限元分析进行建模，以识别目标为60 kHz的谐振频率和损耗因子。数值计算结果与机电特性测试进行了比较。换能器响应在不同方向上产生的波动研究使用多物理场模型耦合的结构和压电性能的机械和电气响应。的方向依赖性和传感器响应的灵敏度被确定使用的激光诱导的负载函数。在实验室规模的钢管模拟和泄漏定位的传感器响应与传统的厚度模式AE传感器进行了比较。
Pipeline leak detection using an acoustic emission (AE) method requires highly sensitive transducers responding to less attenuative and dispersive wave motion in order to place the discrete transducer spacing in an acceptable approach. In this paper, a new piezoelectric transducer geometry made of PZT-5A is introduced to increase the transducer sensitivity to the tangential direction. The finite element analysis of the transducer geometry is modeled in the frequency domain to identify the resonant frequency, targeting 60 kHz, and the loss factor. The numerical results are compared with the electromechanical characterization tests. The transducer response to wave motion generated in different directions is studied using a multiphysics model that couples mechanical and electrical responses of structural and piezoelectric properties. The directional dependence and the sensitivity of the transducer response are identified using the laser-induced load function. The transducer response is compared with a conventional thickness mode AE transducer under simulations and leak localization in a laboratory scale steel pipe.