非铁磁材料的电磁超声接收过程数值模拟及实验研究
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摘要
针对非铁磁金属板的缺陷检测问题,进行了电磁超声无损检测技术的数值模拟及实验研究。电磁超声换能器工作机理复杂,已有仿真大多是针对发射过程,并且被测体不含缺陷。该文研究建立了超声发射、电磁超声换能器接收的有限元模型,对被测体有无缺陷时线圈接收到的电压信号进行仿真分析。根据发射频率和超声导波的频散特性,设计并制作了回折形线圈,然后研究了线圈导体尺寸及线圈提离对电磁超声换能器性能的影响,并对有无缺陷的铝板进行了实验研究。结果表明:仿真中线圈接收到的电压信号能够反映缺陷的位置,实验结果与仿真结果相吻合。该工作对电磁超声被测试样有无缺陷时接收信号的分析和线圈设计有参考意义。
Aiming at defect detecting problems of the nonferromagnetic metal plate, a numerical simulation and experimental study were carried out. The working mechanism of electromagnetic acoustic transducer is complex. Existing simulations are mainly aimed at the exciting process, and the specimen has no defect. In this research, a finite element model of ultrasonic emission and electromagnetic acoustic transducer reception was established, and the induced voltage received by the coil was analyzed when there is defective or not in the specimen. According to the excitation frequency and the dispersion characteristics of ultrasonic guided wave, the meander coil was designed and fabricated. Then, the coil conductor size and the effect of coil lift-off on the performance of the electromagnetic acoustic transducer were studied. The experiment was carried out on the aluminum plate with no defect or defects. The results show that the voltage signal received by the coil can reflect the position of the defect. The experimental results are in agreement with the simulation results. The work in this paper is of great significance for the design of the coil and the analysis of the receiving signal when the test specimen with or without defects in electromagnetic acoustic transducer.
Aiming at defect detecting problems of the nonferromagnetic metal plate, a numerical simulation and experimental study were carried out. The working mechanism of electromagnetic acoustic transducer is complex. Existing simulations are mainly aimed at the exciting process, and the specimen has no defect. In this research, a finite element model of ultrasonic emission and electromagnetic acoustic transducer reception was established, and the induced voltage received by the coil was analyzed when there is defective or not in the specimen. According to the excitation frequency and the dispersion characteristics of ultrasonic guided wave, the meander coil was designed and fabricated. Then, the coil conductor size and the effect of coil lift-off on the performance of the electromagnetic acoustic transducer were studied. The experiment was carried out on the aluminum plate with no defect or defects. The results show that the voltage signal received by the coil can reflect the position of the defect. The experimental results are in agreement with the simulation results. The work in this paper is of great significance for the design of the coil and the analysis of the receiving signal when the test specimen with or without defects in electromagnetic acoustic transducer.
引文
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[14]Wang Shujuan,Su Riliang,Chen Xiaoyang,et al.Numerical and experimental analysis of unidirectional meander-line coil electromagnetic acoustic transducers[J].IEEE Transactions on Ultrasonics,Ferroelectrics,and Frequency Control,2013,60(12):2657-2664.
[15]Wang Shujuan,Li Zhichao,Li Pengzhan,et al.Numerical and experimental evaluation of the receiving performance of meander-line coil EMATs[J].Nondestructive Testing and Evaluation,2014,29(4):269-282.
[16]Ghose B,Balasubramaniam K,Krishnamurthy C V,et al.Two dimensional FEM simulation of ultrasonic wave propagation in isotropic solid media using COMSOL[R].Excerpt from the Proceeding of the COMSOL Conference,India,2010.
[17]李智超.基于洛伦兹力机理的电磁超声换能器建模及仿真研究[D].哈尔滨:哈尔滨工业大学,2010.
[18]康磊.用于铝板检测的电磁超声导波换能器优化设计技术研究[D].哈尔滨:哈尔滨工业大学,2010.
[2]Kang Lei,Zhang Chao,Dixon S,et al.Enhancement of ultrasonic signal using a new design of Ray-leighwave electromagnetic acoustic transducer[J].Ndt&EInternational,2016,86:36-43.
[3]刘素贞,王晨光,张闯,等.电磁超声扫描装置及其控制系统的设计[J].电工技术学报,2015,30(10):20-25.Liu Suzhen,Wang Chenguang,Zhang Chuang,et al.Design of electromagnetic ultrasonic scanning device and its control system[J].Transactions of China Electrotechnical Society,2015,30(10):20-25.
[4]张闯,李福彪,刘素贞,等.电磁加载对超声传播特性的影响[J].电工技术学报,2017,32(2):102-107.Zhang Chuang,Li Fubiao,Liu Suzhen,et al.Impacts of the electromagnetic loading on the propagation of the ultrasonic wave[J].Transactions of China Electrotechnical Society,2017,32(2):102-107.
[5]张闯,蒋盼,刘素贞,等.电磁声发射信号的压缩与重构处理[J].电工技术学报,2017,32(9):121-128.Zhang Chuang,Jiang Pan,Liu Suzhen,et al.Compression and reconstruction processing of the electromagnetically induced acoustic emission signal[J].Transactions of China Electrotechnical Society,2017,32(9):121-128.
[6]刘素贞,张严伟,张闯,等.电磁超声管道周向兰姆波仿真分析及缺陷检测特性研究[J].电工技术学报,2017,32(11):144-151.Liu Suzhen,Zhang Yanwei,Zhang Chuang,et al.Research on simulation analysis of electromagnetic ulatrasonic circumferential Lamb waves and defect feature detection in pipeline[J].Transactions of China Electrotechnical Society,2017,32(11):144-151.
[7]Boughedda H,Hacib T,Chelabi M,et al.Electromagnetic acoustic transducer for cracks detection in conductive material[C]//International Conference on Electrical Engineering,Boumerdes,Algeria,2015:7416717.
[8]刘素贞,张严伟,张闯,等.电磁超声激励系统阻抗匹配网络的设计[J].电工技术学报,2016,31(16):1-6.Liu Suzhen,Zhang Yanwei,Zhang Chuang,et al.Design of impedance matching network for electromagnetic ultrasonic excitation system[J].Transactions of China Electrotechnical Society,2016,31(16):1-6.
[9]刘素贞,李丽滨,蔡智超,等.电磁超声检测系统中消除电磁干扰电路的设计[J].电工技术学报,2016,31(1):80-84.Liu Suzhen,Li Libin,Cai Zhichao,et al.The design for electromagnetic interference eliminating circuits in electromagnetic ultrasonic testing systems[J].Transactions of China Electrotechnical Society,2016,31(1):80-84.
[10]范吉志,吴运新,石文泽,等.电磁超声换能器线圈设计与提高换能效率研究[J].传感技术学报,2016,29(1):29-34.Fan Jizhi,Wu Yunxin,Shi Wenze,et al.Research of spiral coil on EMAT to improve transduction effiency[J].Chinese Journal of Sensors and Actuators,2016,29(1):29-34.
[11]刘素贞,张闯,金亮,等.电磁超声换能器的三维有限元分析[J].电工技术学报,2013,28(8):7-12.Liu Suzhen,Zhang Chuang,Jin Liang,et al.3D finite element analysis of electromagnetic ultrasonic transducers[J].Transactions of China Electrotechnical Society,2013,28(8):7-12.
[12]Hao Kuansheng,Huang Songling,Zhao Wei,et al.Modeling and finite element analysis of transduction process of electromagnetic acoustic transducers for nonferromagnetic metal material testing[J].Journal of Central South University,2011,18(3):749-754.
[13]王淑娟,李智超,李鹏展,等.非铁磁材料表面波电磁超声换能器接收性能分析与优化设计[J].中国电机工程学报,2015,35(9):2360-2365.Wang Shujuan,Li Zhichao,Li Pengzhan,et al.Receiving performance analysis and optimal design of surface wave electromagnetic acoustic transducers in nonferromagnetic materials[J].Proceedings of the CSEE,2015,35(9):2360-2365.
[14]Wang Shujuan,Su Riliang,Chen Xiaoyang,et al.Numerical and experimental analysis of unidirectional meander-line coil electromagnetic acoustic transducers[J].IEEE Transactions on Ultrasonics,Ferroelectrics,and Frequency Control,2013,60(12):2657-2664.
[15]Wang Shujuan,Li Zhichao,Li Pengzhan,et al.Numerical and experimental evaluation of the receiving performance of meander-line coil EMATs[J].Nondestructive Testing and Evaluation,2014,29(4):269-282.
[16]Ghose B,Balasubramaniam K,Krishnamurthy C V,et al.Two dimensional FEM simulation of ultrasonic wave propagation in isotropic solid media using COMSOL[R].Excerpt from the Proceeding of the COMSOL Conference,India,2010.
[17]李智超.基于洛伦兹力机理的电磁超声换能器建模及仿真研究[D].哈尔滨:哈尔滨工业大学,2010.
[18]康磊.用于铝板检测的电磁超声导波换能器优化设计技术研究[D].哈尔滨:哈尔滨工业大学,2010.