航空学报2026，Vol.47Issue(3)：290-307,18.DOI:10.7527/S1000-6893.2025.31970
高温激光-仅线圈式表面波EMAT优化设计及应用
Optimal design and application of high-temperature laser coil-only Rayleigh wave EMAT
摘要
Abstract
Aimed at the problems of traditional permanent magnet or liquid-cooled permanent magnet type Electro-Magnetic Acoustic transducer(EMAT),such as large volume,easy demagnetization of permanent magnet at high temperature and difficulty in sustained high temperature detection,a laser coil-only Rayleigh Wave(RW)EMAT detec-tion method for high-temperature-sustained on-line monitoring is proposed.A finite element model for field-circuit cou-pling analysis of the aluminum alloy laser coil-only RW EMAT detection process based on the surface constraint mechanism was established,and the effects of key design parameters such as the excitation coil of the coil-only RW EMAT on the amplitude and wave packet width of the RW detection were analyzed by using orthogonal experimental method,according to which,the optimal design parameter combinations of the coil-only RW EMAT was obtained and verified by experiments.The laser coil-only RW EMAT high-temperature on-line detection system was developed,and the on-line detection experiment of surface crack defects of high-temperature aluminum alloy at 20-500℃was carried out.The results show that the number of wire splitting and coil turns of the receiving coil(meander coil)have a major influence on the received signal amplitude and wave packet width of the coil-only RW EMAT,respectively.The receiv-ing amplitude of the optimized coil-only RW EMAT is increased by 1.67 times.Furthermore,the on-line detection of surface crack defects of 500℃high-temperature aluminum alloy can be realized by using the differential circuit device and matching the width of the laser line light source with the turn spacing of the coil-only RW EMAT coil.The proposed method provides theoretical support and technical guidance for laser coil-only RW EMAT high-temperature on-line non-destructive testing and monitoring.关键词
高温检测/激光/仅线圈式RW EMAT/表面约束/场路耦合/正交试验Key words
high-temperature detection/laser/coil-only RW EMAT/surface constraint/field-circuit coupling/or-thogonal test分类
航空航天引用本文复制引用
董利飞,邓子辰,卢超,石文泽,何盼,陈巍巍..高温激光-仅线圈式表面波EMAT优化设计及应用[J].航空学报,2026,47(3):290-307,18.基金项目
中央军民融合专项转移支付项目(GT202408141) （GT202408141）
国防基础科研计划(JCKY2022401C005) （JCKY2022401C005）
江西省主要学科学术和技术带头人培养计划——青年人才项目(20225BCJ23023) （20225BCJ23023）
江西省杰出青年基金(20212ACB214010) Central Military-civil Integration Special Transfer Payment Project(GT202408141) （20212ACB214010）
National Defense Basic Research Projects(JCKY2022401C005) （JCKY2022401C005）
Training Program for Academic and Technical Leaders of Major Disciplines in Jiangxi Province(20225BCJ23023) （20225BCJ23023）
Jiangxi Province Founds for Distinguished Young Youths(20212ACB214010) （20212ACB214010）
