高温铝合金仅线圈式电磁超声检测方法研究

doi:10.3901/JME.2025.06.079

机械工程学报 ›› 2025, Vol. 61 ›› Issue (6): 79-91.doi: 10.3901/JME.2025.06.079

• 仪器科学与技术 • 上一篇

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高温铝合金仅线圈式电磁超声检测方法研究

石文泽¹, 邵纬桑¹, 卢超¹, 张路根², 张琦², 刘远¹

1. 南昌航空大学无损检测技术教育部重点实验室南昌 330063;
2. 江西省检验检测认证总院特种设备检验检测研究院南昌 330036

收稿日期:2024-08-20 修回日期:2024-12-13 发布日期:2025-04-14
作者简介:石文泽，男，1986年出生，博士，副教授，硕士研究生导师。主要研究方向为超声检测新技术。E-mail:70658@nchu.edu.cn;邵纬桑，男，1995年出生。主要研究方向为电磁超声。E-mail:837044501@qq.com;卢超(通信作者)，男，1971年出生，博士，教授，博士研究生导师。主要研究方向为声学检测技术及检测信号处理等。E-mail:luchaoniat@163.com
基金资助:
江西省重点研发计划(20223BBE51034)、江西省主要学科学术和技术带头人培养计划(20225BCJ23023)、国防基础科研计划(JCKY2022401C005)和南昌航空大学研究生创新专项资金(YC2022-s743)资助项目。

Study on Coil-only Electromagnetic Ultrasonic Testing Method for High-Temperature Aluminum Alloy

SHI Wenze¹, SHAO Weisang¹, LU Chao¹, ZHANG Lugen², ZHANG Qi², LIU Yuan¹

1. Key Laboratory of Nondestructive Testing of Ministry of Education, Nanchang Hangkong University, Nanchang 330063;
2. Jiangxi General Institute of Testing and Certification Special Equipment Inspection & Research Institute, Nanchang 330036

Received:2024-08-20 Revised:2024-12-13 Published:2025-04-14

摘要/Abstract

摘要： 针对传统永磁铁式电磁声换能器(Electromagnetic acoustic transducer,EMAT)在高温检测时永磁体的磁感应强度降低、带有水冷装置的EMAT探头体积庞大难以适合狭窄区域检测、永磁体易吸附铁磁性颗粒导致换能效率下降甚至功能性损坏等问题，提出了一种高温仅线圈式电磁超声技术、检测电路与建模方法。以仅螺旋线圈式EMAT为例，搭建了仅线圈式EMAT检测电路，并对高温检测过程进行场路耦合有限元分析，研究了温度对仅线圈式EMAT的检测电路放电电流、激励效率、超声传播特性和接收效率的影响规律。结果表明，影响高温检测回波幅值的因素按贡献比例排序依次为：介质衰减、激励效率、接收效率、扩散衰减、单位力激发超声波位移幅值。所研制的仅线圈式EMAT检测系统可以实现450℃高温铝合金试样持续检测，且二次底波的信噪比不小于16.86 dB。

关键词: 电磁声换能器, 仅线圈式EAMT, 铝合金, 高温检测, 场路耦合分析

Abstract: In response to the problem of a reduction in magnetic induction intensity when a traditional permanent magnet electromagnetic acoustic transducer (EMAT) is used in high-temperature detection, the EMAT probes with water-cooled devices are bulky and unable to detect in narrow areas, and magnets easily adsorbing ferromagnetic particles, resulting in a decrease in conversion efficiency, A coil-only EMAT technique, its detection circuit and modeling method are proposed. Taking the coil-only spiral coil EMAT as an example, the coil-only EMAT detection circuit was constructed, and a field-circuit coupled finite element model analysis was conducted on the high-temperature detection process. The influence of temperature on circuit characteristics, excitation efficiency, ultrasonic propagation characteristics, and reception efficiency of the coil-only EMAT was studied. The results show that the factors that affect the amplitude of high-temperature detection echoes are ranked in order of contribution ratio：medium attenuation, excitation efficiency, reception efficiency, diffusion attenuation, and unit-force-excited ultrasonic displacement amplitude. The developed coil only EMAT detection system can achieve continuous detection of 450 ℃ high-temperature aluminum alloy samples, and the signal-to-noise ratio of the secondary bottom wave is not less than 16.86 dB.

Key words: electromagnetic acoustic transducer (EMAT), coil-only EMAT, aluminium alloy, high-temperature, field-circuit coupled analysis

中图分类号:

TB552

石文泽, 邵纬桑, 卢超, 张路根, 张琦, 刘远. 高温铝合金仅线圈式电磁超声检测方法研究[J]. 机械工程学报, 2025, 61(6): 79-91.

SHI Wenze, SHAO Weisang, LU Chao, ZHANG Lugen, ZHANG Qi, LIU Yuan. Study on Coil-only Electromagnetic Ultrasonic Testing Method for High-Temperature Aluminum Alloy[J]. Journal of Mechanical Engineering, 2025, 61(6): 79-91.

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高温铝合金仅线圈式电磁超声检测方法研究

Study on Coil-only Electromagnetic Ultrasonic Testing Method for High-Temperature Aluminum Alloy

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