集横波与SH波一体的Halbach阵列换能器研究  

Research on Halbach array transducer integrating shear wave and SH wave

作　　者：陈路安 吕福在 张鹏飞 韩烨 唐志峰[1] Chen Lu′an;Lyu Fuzai;Zhang Pengfei;Han Ye;Tang Zhifeng(College of Biomedical Engineering and Instrument Science,Zhejiang University,Hangzhou 310027,China;College of Mechanical Engineering,Zhejiang University,Hangzhou 310027,China;Pipe China(Xuzhou)Pipeline Inspection Co.,Ltd.,Xuzhou 221008,China)

机构地区：[1]浙江大学生物医学工程与仪器科学学院,杭州310027 [2]浙江大学机械工程学院,杭州310027 [3]管网集团(徐州)管道检验检测有限公司,徐州221008

出　　处：《仪器仪表学报》2024年第6期274-287,共14页Chinese Journal of Scientific Instrument

基　　金：国家重点研发计划(2023YFF0716603)项目资助。

摘　　要：为解决金属板超声体波测厚效率低下、导波扫查定量能力不足的问题,提出了一种集横波与水平剪切(SH)波为一体的Halbach阵列电磁超声换能器,在不增加体积的条件下,可同时实现横波和SH0阶导波的激励,兼具高精度定点测厚和区域缺陷扫查功能。通过仿真对磁体阵列和线圈排布结构进行了建模与优化,基于优化结果加工、装配了换能器原型。针对SH波扫查和横波测厚功能分别搭建了实验平台,实验结果表明该换能器能够有效识别粘附铁块尺寸大于35 mm×10 mm×20 mm的缺陷回波,横波测厚的平均误差小于1.2%。该研究结合了超声体波定点测厚穿透强、准确度高以及SH波长距扫查、非频散的优势,提升了换能器的检测效率和功能性,具有良好的工业应用潜力。To address the inefficiencies of ultrasonic bulk wave thickness measurement and insufficient quantitative capability of guided wave detection,a Halbach array electromagnetic ultrasonic transducer integrating shear wave and shear horizontal(SH)guided wave is proposed for metal plate detection.It has the ability to excite both shear-wave and SH0 guided wave without increasing the dimension of the transducer,which combines the functions of high-precision fixed-point thickness measurement and regional defect detection.The transducer prototype was modeled and optimized for magnet array and coil arrangement through finite element simulation,followed by manufacturing and assembly based on the optimized results.Experimental platforms were established for SH wave detection and shear wave thickness measurement function respectively.The experimental results show that the transducer can effectively identify the echoes caused by the iron block adhering to the sample when the size of the block is larger than 35 mm×10 mm×20 mm,and the average thickness measurement error is less than 1.2%.This study combines the deep penetration and high accuracy of ultrasonic bulk wave point thickness measurement with the long-range,non-dispersive scanning capability of SH waves,thereby enhancing the transducer′s detection efficiency and functionality.The transducer shows significant potential for industrial applications.

关 键 词：复合式换能器 线圈优化 HALBACH阵列 超声测厚 缺陷检测 

分 类 号：TB553[理学—物理] TG115.28[理学—声学] TH878[金属学及工艺—物理冶金]