基于反转威德曼效应的管道扭转导波监测换能器设计  

Transducer Design of Pipe Torsion Guided Wave Monitoring Based on Reversal Weidmann Effect

作　　者：张帆[1] 马共立 李策[1] 王淑娟[1] ZHANG Fan;MA Gong-li;LI Ce;WANG Shu-juan(The Reliability Institute for Electric Apparatus and Electronics,Harbin Institute of Technology,Harbin 150001,China;Harbin Railway Research Institute Technology Co.,Ltd.,Harbin 150006,China)

机构地区：[1]哈尔滨工业大学电器与电子可靠性研究所,黑龙江哈尔滨150001 [2]哈尔滨铁路科研所科技有限公司,黑龙江哈尔滨150006

出　　处：《仪表技术与传感器》2022年第7期28-33,共6页Instrument Technique and Sensor

基　　金：民用航天技术预先研究项目(JZKGJ20190004);国家自然科学基金面上项目(51977044)。

摘　　要：针对预磁化式磁致伸缩扭转导波换能器换能效率低、磁致伸缩材料消磁导致无法长期监测的不足,文中基于反转威德曼效应设计了一种永磁式磁致伸缩扭转导波换能器,适用于长距离管道健康监测。首先,阐述磁致伸缩扭转导波换能器换能机理,提出管道周向永磁阵列和柔性曲折线圈换能器结构。然后,使用COMSOL Multiphysics软件对换能器偏置磁场进行仿真,研究永磁铁对偏置磁场的影响,并确定永磁铁阵列参数。最后,在管道中激励扭转导波,实验研究磁致伸缩贴片宽度对换能器频率响应特性的影响。实验结果表明:设计的换能器能够在管道中激励纯净的T(0,1)模态导波,通过调整磁致伸缩贴片宽度,能够改变换能器中心频率。In view of the low energy conversion efficiency of the pre⁃magnetized magnetostrictive torsional guided wave trans⁃ducer and the demagnetization of the magnetostrictive material leads to the lack of long⁃term monitoring,in this paper,a perma⁃nent magnet magnetostrictive torsion guide was designed based on the reversal Weidmann effect.This transducer is more suitable for long⁃distance pipeline health monitoring.First,the energy conversion mechanism of the magnetostrictive torsional guided wave transducer was described,a structure that has the tubular circumferential permanent magnet array and a flexible meander coil transducer was proposed.Then,COMSOL Multiphysics software was used to simulate the transducer bias magnetic field,the effect of permanent magnets on the bias magnetic field was explored,and the permanent magnet array parameters were determined.Final⁃ly,the torsion guided wave was excited in the pipeline,and the influence of the width of the magnetostrictive patch on the frequen⁃cy response characteristics of the transducer was explored.The results show that the transducer designed in this paper can excite pure T(0,1)modal guided waves in the pipeline,and the center frequency of the transducer can be changed by adjusting the width of the magnetostrictive patch.

关 键 词：反转威德曼效应 磁致伸缩 扭转导波 监测换能器 

分 类 号：TB552[理学—物理]