小尺寸试件检测用单向单模态电磁超声换能器设计

doi:10.19595/j.cnki.1000-6753.tces.181011

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Abstract For ultrasonic testing of small-size thin plate specimens, the ultrasonic echo signal collected will be very complicated due to the dispersion and multimodal properties of lamb waves,multidirectional emission of electromagnetic ultrasonic transducers and the influence of plate end surface reflection,which is not conducive to further signal analysis. Based on the traditional EMAT and the principle of wave superposition, a new EMAT using four winding coils to excite one-way single mode Lamb waves is designed in this paper. By changing the coil spacing, excitation delay time and current direction, the excitation direction and mode of Lamb wave are selectively controlled and reduce the interference wave in defect detection. The method is applied to the defect detection of small-size plate. Through simulation and experimental comparison with the traditional single-loop EMAT, the feasibility of the new EMAT in the defect detection of thin aluminum sheet with a length of 10 cm is verified. Because the defect echo signal is clear and distinguishable, it greatly reduces the difficulty of subsequent signal processing.

Key words： Electromagnetic acoustic transducer Lamb wave single-mode unidirection

Received: 11 June 2018 Published: 20 September 2019

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TB552

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	Articles by authors
	Zhang Chuang
	Wei Qi
	Liu Suzhen
	Yang Qingxin

Cite this article:

Zhang Chuang,Wei Qi,Liu Suzhen等. Design of Unidirectional Single-Mode Electromagnetic Acoustic Transducer for Small Size Specimen Detection[J]. Transactions of China Electrotechnical Society, 2019, 34(17): 3563-3571.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.181011 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I17/3563

[1] 金亮, 寇晓斐, 郭富坤, 等. 基于电磁超声换能器的铁磁材料电磁声发射检测方法[J]. 电工技术学报, 2017, 32(18): 98-105.
Jin Liang, Kou Xiaofei, Guo Fukun, et al.Electromagnetic acoustic emission detection method of ferromagnetic materials based on the EMAT[J]. Transactions of China Electrotechnical Society, 2017, 32(18): 98-105.
[2] Dao P B, Staszewski W J.Lamb wave based structural damage detection using cointegration and fractal signal processing[J]. Mechanical Systems & Signal Processing, 2014, 49(1-2): 285-301.
[3] Gao Fei, Zeng Liang, Lin Jing, et al.Damage assessment in composite laminates via broadband Lamb wave[J]. Ultrasonics, 2018, 86: 49-58.
[4] Wang Yikuan, Guan Ruiqi, Lu Ye.Nonlinear Lamb waves for fatigue damage identification in FRP-reinforced steel plates[J]. Ultrasonics, 2017, 80: 87-95.
[5] Rose J L.Ultrasonic guided waves in solid media[M]. Cambridge Britain: Cambridge University Press, 2014.
[6] Lee J K, Kim Y Y.Tuned double-coil EMATs for omnidirectional symmetric mode Lamb wave generation[J]. Ndt & E International, 2016, 83: 38-47.
[7] Seifried R, Jacobs L J, Qu J.Propagation of guided waves in adhesive bonded components[J]. Ndt & E International, 2002, 35(5): 317-328.
[8] Huang Songling, Zhao Wei, Zhang Yongsheng, et al.Study on the lift-off effect of EMAT[J]. Sensors & Actuators A Physical, 2009, 153(2): 218-221.
[9] 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.
[10] Zhang Z G, Que P W, Lei H M.Magnetostrictive generation of Lamb wave by electromagnetic acoustic transducer and its characters[J]. Journal of Shanghai Jiaotong University, 2006, 40(1): 133-137.
[11] Dixon S, Edwards C, Palmer S B.Recent developments in the characterisation of aluminium sheets using electromagnetic acoustic transducers (EMATs)[J]. Insight-Non-Destructive Testing and Condition Monitoring, 2002, 44(5): 274-278.
[12] Lee J K, Kim Y Y.Tuned double-coil EMATs for omnidirectional symmetric mode Lamb wave generation[J]. Ndt & E International, 2016, 83: 38-47.
[13] Liu Zhenghua, Hu Yanan, Xie Muwen, et al.Development of omnidirectional A0 mode EMAT employing a concentric permanent magnet pairs with opposite polarity for plate inspection[J]. Ndt & E International, 2018, 94: 13-21.
[14] 刘素贞, 张严伟, 张闯, 等. 基于电磁超声双换能器的单模态Lamb波激励方法研究[J]. 电工技术学报, 2018, 33(1): 140-147.
Liu Suzhen, Zhang Yanwei, Zhang Chuang, et al.Research on excitation method of single-mode Lamb wave based on electromagnetic acoustic double transducer[J]. Transactions of China Electrotechnical Society, 2018, 33(1): 140-147.
[15] Sinkevich O A, Glazkov V V, Kireeva A N.Generalized rayleigh-Lamb equation[J]. High Temperature, 2012, 50(4): 517-526.
[16] 李明亮, 邓明晰, 高广健. 电磁超声换能器激发超声兰姆波的模式展开分析[J]. 声学学报, 2014, 39(3): 385-391.
Li Mingliang, Deng Mingxi, Gao Guangjian.Modal expansion analysis of ultrasonic Lamb waves generated by electromagnetic ultrasonic transducers[J]. Technical Acoustics, 2014, 39(3): 385-391.
[17] Giurgiutiu V.Tuned Lamb wave excitation and detection with piezoelectric wafer active sensors for structural health monitoring[J]. Journal of Intelligent Material Systems & Structures, 2005, 16(4): 291-305.
[18] Nagy P B, Simonetti F, Instanes G.Corrosion and erosion monitoring in plates and pipes using constant group velocity Lamb wave inspection[J]. Ultrasonics, 2014, 54(7): 1832-1841.