压电超声内检测器探头阵列的声场瞬时特性  

Transient characteristics of sound field of the piezoelectric ultrasonic internal detector probe array

作　　者：蔡亮学 王勐龙 刘彤 徐广丽 CAI Liangxue;WANG Menglong;LIU Tong;XU Guangli(School of Oil&Natural Gas Engineering,Southwest Petroleum University;Oil&Gas Fire Protection Key Laboratory of Sichuan Province)

机构地区：[1]西南石油大学石油与天然气工程学院,610500 [2]油气消防四川省重点试验室

出　　处：《油气储运》2020年第2期176-182,共7页Oil & Gas Storage and Transportation

基　　金：国家自然科学基金资助项目“地形起伏管道油流携水机理研究”,51606160。

摘　　要：为探究压电超声内检测器探头阵列声场的瞬时特性,采用COMSOL Multiphysics软件建立了探头阵列在管道中的有限元模型,基于自研压电超声内检测器试验测试条件,验证了有限元模型的正确性。分别研究单探头与双探头工作状态下阵列声场的瞬时特性,得到了两种工作状态下声场中各点的声压变化规律。结果表明:回波信号对相邻探头信号接收的影响较小;相邻双探头同时工作时,声压叠加区域远离探头表面,对相邻探头信号接收的影响也易消除。该模型可以确定管道中探头阵列在给定工况下的总声场,为压电超声内检测器的设计提供理论依据。To study the transient characteristics of the sound field of the piezoelectric ultrasonic internal detector probe array, a finite element model of the probe array in the pipeline was established by COMSOL Multiphysics software, and the correctness was verified under experimental test conditions of the self-developed piezoelectric ultrasonic internal detector. Transient characteristics of the sound field under working conditions of single probe and double probes were studied respectively, and the variation of sound pressure at each point of the sound field under the two working conditions was obtained. The results show that the influence of echo signals on the signal reception of adjacent probes is small. When two adjacent probes work at the same time, the sound pressure superposition area is far away from the probe surface, and its influence on signal reception of adjacent probes can be easily eliminated. This model can determine the total sound field of a probe array in the pipeline under given conditions, and provide theoretical basis for the design of the piezoelectric ultrasonic internal detector.

关 键 词：超声波 内检测器 探头阵列 声场 瞬时特性 

分 类 号：TE973[石油与天然气工程—石油机械设备]