基于Barker码脉冲压缩技术的钢板多阵元Lamb波EMAT设计与优化

doi:10.19595/j.cnki.1000-6753.tces.230249

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Abstract

In order to solve the problem that the traditional Barker code pulse compression technology was limited by the rated parameters of the pulse power amplifier (duty cycle, maximum pulse width, etc.), which resulted in a reduction of the pulse compression effect and detection speed, a multi-element Lamb wave Electromagnetic Acoustic Transducer (EMAT) based on Barker code pulse compression technology was proposed. In the multi-element EMAT, a combination of a permanent magnet and a meander line coil was considered an independent element, and the direction of Lorentz force was controlled by the magnetic field direction of the permanent magnet and the current direction of the meander line coil in each group of array elements. In this way, the excited Lamb wave phase0,180° is consistent with the Barker code sequence 1,-1, and ultimately it could excite Lamb waves with the Barker code form. A finite element model of the multi-element Lamb wave EMAT detection process based on Barker code pulse compression technology with tone-burst excitation was established. The influences of the configuration of the permanent magnets, the length of the array element sequence, the number of excitation signal cycles, the turn of the meander line coil, and other factors on the peak-side lobe ratio and the main lobe width after pulse compression were analyzed and verified experimentally. The results show that the signal-to-noise ratio (SNR) of the pulse-compressed signal after sidelobe suppression can be improved by configuring external permanent magnets when the multi-element Lamb wave EMAT is excited by the tone-burst signal. The SNR of the detection echo can be increased by 9.8 dB when the multi-element EMAT with four turns meander line coil and 13 bits Barker code sequence length is configured with three pairs of external permanent magnets. As the number of excitation signal cycles increases, the main lobe width of the pulse-compressed signal after sidelobe suppression shows a continuously rising trend, and the SNR shows a first increasing and then decreasing trend; As the length of the Barker sequence increases, the SNR of the pulse-compressed signal after sidelobe suppression shows a continuously increasing trend. In consideration of the spatial resolution and SNR of the detected echo, the best parameters of the multi-element Lamb wave EMAT are: the turn of the meander line coil is 10, the number of excitation signal cycles is 11, the Barker sequence is 13 bits, and three pairs of external permanent magnets are configured. The new multi-element EMAT can successfully generate Lamb wave in Barker code form when it is excited with the tone-burst signal with a certain period and frequency. After pulse compression, the Lamb wave signal can effectively suppress sidelobes by calculating the delay time and performing sidelobe suppression. The multi-element Lamb wave EMAT based on tone-burst excitation and Barker code pulse compression technology can improve ultrasonic signals' SNR and spatial resolution. When applying this study to guided wave detection of metal plates or pipes with other thicknesses, it is necessary to ensure that the spacing of each array element is consistent. The higher the consistency of the spacing between array elements, the better the pulse compression effect of the ultrasonic signal. It is necessary to ensure the uniformity and consistency of the magnetic field distribution of each array element, which will be beneficial for improving the pulse compression effect.

Key words： Electromagnetic ultrasonic transducer Barker code pulse compression multi-element Lamb wave EMAT signal-to-noise ratio spatial resolution

Received: 03 March 2023

PACS:

TG115.28+5

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	Shi Wenze
	Li Qixin
	Lu Chao
	Hu Bo
	Liu Yuan

Cite this article:

Shi Wenze,Li Qixin,Lu Chao等. Design and optimization of Multi-array Lamb wave EMAT for Steel Plates based on Barker Code Pulse Compression Technology[J]. Transactions of China Electrotechnical Society, 0, (): 9018-18.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.230249 OR https://dgjsxb.ces-transaction.com/EN/Y0/V/I/9018

[1] Vakhguelt A, Kapayeva S D, Bergander M J.Combination non-destructive test (NDT) method for early damage detection and condition assessment of boiler tubes[J]. Procedia Engineering, 2017, 188: 125-132.
[2] 郭俊营,李忠诚,李文旭,贡金鑫.美国在役核电厂安全壳钢衬里锈蚀及修复技术研究进展[J].建筑结构,2022,52(2):127-134.
Guo Junying, Li Zhongcheng, Li Wenxu, Gong Jinxin.Researchprogressoncorrosionandrepairtechnologyofsteellinearofcontainmentin US externalnuclearpowerplants[J].Building Structure, 2022,52(2):127-134.
[3] Mažeika L, Raišutis R, Jankauskas A, et al.High sensitivity ultrasonic NDT technique for detecting creep damage at the early stage in power plant steels[J]. International Journal of Pressure Vessels and Piping, 2022, 196: 104613.
[4] Yu S, Jin H, Cao M.Study on corrosion characteristic of semi-ring steel plate for strengthening shield tunnel under DC stray current[J]. Construction and Building Materials, 2022, 347: 128631.
[5] Su S, Wang P, Shi P, et al.Experiment and simulation on testing steel plate with corrosion defects via magnetic flux leakage method[J]. Journal of Magnetism and Magnetic Materials, 2022, 560: 169595.
[6] Zhang Yusheng, Ming Hongliang, Tang Lichen, et al.Effect of the frequency on fretting corrosion behavior between Alloy 690TT tube and 405 stainless steel plate in high temperature pressurized water[J]. Tribology International, 2021, 164: 107229.
[7] 徐庆林,王向军,张建春,等.921A钢板腐蚀电场的Frumkin修正[J].电工技术学报, 2020, 35(14): 2951-2958.
Xu Qinglin, Wang Xiangjun, Zhang Jianchun, Liu Dehong.Frumkin Correction of Corrosion Electric Field Generated by 921A Steel[J]. Transactions of China Electrotechnical Society, 2020, 35(14): 2951-2958.
[8] Singh S, Grewal J S, Rakha K.Erosion wear performance of HVOF and cold spray coatings deposited on T-91 boiler steel[J]. Materials Today: Proceedings, 2022, 62: 7509-7516.
[9] Zou D L, Hao Y F, Wu H, et al.Safety assessment of large-scale all steel LNG storage tanks under wind-borne missile impact[J]. Thin-Walled Structures, 2022, 174: 109078.
[10] 刘继伦,刘素贞,金亮,等.用于测厚和裂纹检测的正交横波电磁超声换能器仿真分析及实验研究[J].电工技术学报,2022,37(11):2686-2697.
Liu Jilun, Liu Suzhen, Jin Liang, et al.Simulation and experiment of orthogonal shear waves with electromagnetic acoustic transducer for thickness measurement and crack detection[J]. Transactions of China Electrotechnical Society, 2022, 37(11): 2686-2697.
[11] 蔡智超,李毅博.基于Halbach阵列电磁超声纵波换能器优化设计[J].电工技术学报, 2021, 36(21): 4408-4417.
Cai Zhichao, Li Yibo. optimum design of electromagnetic acoustic longitudinal wave transducer based on Halbach array[J]. Transactions of China Electrotechnical Society, 2021, 36(21): 4408-4417.
[12] Zhai Guofu, Liang Bao, Li Xi, et al.High-temperature EMAT with double-coil configuration generates shear and longitudinal wave modes in paramagnetic steel[J]. NDT & E International, 2022, 125: 102572.
[13] Tu Jun, Zhong Zhiwu, Song Xiaochun, et al.An external through type RA-EMAT for steel pipe inspection[J]. Sensors and Actuators A: Physical, 2021, 331: 113053.
[14] Tkocz J, Greenshields D, Dixon S.High power phased EMAT arrays for nondestructive testing of as-cast steel[J]. NDT & E International, 2019, 102: 47-55.
[15] 刘素贞,王淑娟,张闯,等.钢板电磁超声表面波的仿真分析及缺陷定量检测[J].电工技术学报,2020,35(1):97-105.
Liu Suzhen, Wang Shujuan, Zhang Chuang, Jin Liang, Yang Qingxin.Simulation Analysis of Electromagnetic Acoustic Surface Wave of Steel Plate and Quantitative Defect Detection[J]. Transactions of China Electrotechnical Society, 2020,35(1): 97-105.
[16] 武建伟. 超声导波技术在管道检测中的试验分析[J].电工技术,2023(3):148-150.
Wu Jianwei.Analysis of experiment in pipeline detection using ultrasonic guided wave technology[J]. Transactions of China Electrotechnical Society, 2023(03): 148-150.
[17] 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(22):144-151.
Liu Suzhen, Zhang Yanwei, Zhang Chuang, Jin Liang, Yang Qingxin.Research on Simulation Analysis of Electromagnetic Ultrasonic Circumferential Lamb Waves and Defect Feature Detection in Pipeline[J]. Transactions of China Electrotechnical Society, 2017,32(22): 144-151.
[18] Seung H M, Park C I, Kim Y Y.An omnidirectional shear-horizontal guided wave EMAT for a metallic plate[J].Ultrasonics, 2016, 69: 58-66.
[19] Palmer S B, Dixon S.Industrially viable non-contact ultrasound[J]. Insight-Non-Destructive Testing and Condition Monitoring, 2003, 45(3): 211-217.
[20] Ramp H O, Wingrove E R.Principles of pulse compression[J]. IRE Transactions on MilitaryElectronics, 1961 (2): 109-116.
[21] Fu J, Wei G, Huang Q, et al.Barker coded excitation with linear frequency modulated carrier for ultrasonic imaging[J]. Biomedical Signal Processing and Control, 2014, 13: 306-312.
[22] Mitsuta H, Sakai K.High sensitivity detection of ultrasonic signal for nondestructive inspection using pulse compression method[J]. Microelectronics Reliability, 2019, 92: 172-178.
[23] Laureti S, Ricci M, Mohamed M, et al.Detection of rebars in concrete using advanced ultrasonic pulse compression techniques[J]. Ultrasonics, 2018, 85: 31-38.
[24] 时亚,石文泽,陈果,等.钢轨踏面检测电磁超声表面波换能器优化设计[J].仪器仪表学报,2018,39(8):239-249.
Shi Ya, Shi Wenze, Chen Guo, et al.Optimized design of surface wave electromagnetic acoustic transducer for rail tread testing[J]. Chinese Journal of Scientific Instrument, 2018, 39(08): 239-249.
[25] 刘素贞,刘继伦,张闯,等.一种新型窄磁铁聚焦式电磁超声表面波换能器[J/OL].中国电机工程学报:1-13[2023-05-24].http://kns.cnki.net/kcms/detail/11.2107.TM.20220406.1932.004.html.
Liu Suzhen, Liu Jilun, Zhang Chuang, Chai Ke, Qi Lei, Yang Qingxin. A New Electromagnetic Acoustic Transducer Design with Narrow Magnet for Generating Focused Surface Wave[J/OL]. Proceedings of the CSEE: 1-13[2023-05-24].http://kns.cnki.net/kcms/detail/11.2107.TM.20220406.1932.004.html.
[26] Gandomzadeh D, Abbaspour-Fard M H. Numerical study of the effect of core geometry on the performance of a magnetostrictive transducer[J]. Journal of Magnetism and Magnetic Materials, 2020, 513: 166823.
[27] Kang L, Dixon S, Wang K, et al.Enhancement of signal amplitude of surface wave EMATs based on 3-D simulation analysis and orthogonal test method[J]. NDT & E International, 2013, 59: 11-17.
[28] Pei C, Zhao S, Xiao P, et al.A modified meander-line-coil EMAT design for signal amplitude enhancement[J]. Sensors and Actuators A: Physical, 2016, 247: 539-546.
[29] Sun M, Shen Y, Zhang W.A wavelet threshold denoising method for ultrasonic signal based on EMD and correlation coefficient analysis[C]//2010 3rd International Congress on Image and Signal Processing. IEEE, 2010, 8: 3992-3996.
[30] Nie Z, Wang K, Zhao M. Application of wavelet and EEMD joint denoising in nonlinear ultrasonic testing of concrete[J]. Advances in Materials Science and Engineering, 2018, 2018.[2018-05-16]. https://doi.org/10.1155/2018/7872036.
[31] Si D, Gao B, Guo W, et al.Variational mode decomposition linked wavelet method for EMAT denoise with large lift-off effect[J]. NDT & E International, 2019, 107: 102149.
[32] Hao K, Huang S, Zhao W, 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.
[33] Harris F J.On the use of windows for harmonic analysis with the discrete Fourier transform[J]. Proceedings of the IEEE, 1978, 66(1): 51-83.
[34] Miller R.Fundamentals of radar signal processing (Richards, ma; 2005)[book review][J]. IEEE Signal Processing Magazine, 2009, 26(3): 100-101.
[35] Jafari-Shapoorabadi R, Konrad A, Sinclair A N.Comparison of three formulations for eddy-current and skin effect problems[J]. IEEE transactions on magnetics, 2002, 38(2): 617-620.