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| Characteristics of Acoustic Emission Signals Induced by Electromagnetic Exciting Based on Wavelet Method and Kaiser Effect |
| Jin Liang1, Yang Qingxin1, Liu Suzhen2, Zhang Guangchao1, Zhang Xian1 |
| 1. Key Laboratory of Advanced Electrical Engineering and Energy Technology Tianjin Polytechnic University Tianjin 300387 China 2. Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability Hebei University of Technology Tianjin 300130 China |
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Abstract Aiming at the features of a wide frequency response and the serious low-frequency noise interference of Acoustic Emission (AE) induced by signal pulse eddy current, the Wavelet Method and Fast Fourier Transform (FFT) are used to analyze signals from different samples under different exciting currents. And the strength feature of AE signals is obtained through comparing the signals feature of different samples. The calculated deformation and experimental AE signals are normalized based on AE Theory. And according to Kaiser effect, the partly direct relationship between the acoustic emission signal and the calculated deformation can be obtained. This can provide useful references for the optimization analysis and engineering application of AE.
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Received: 20 November 2012
Published: 25 March 2014
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[1] Hensman J, Pullin R, Meaton, et al. Detecting and identifying artificial acoustic emission signals in an in industrial fatigue environment [J]. Measurement Science and Technology, 2009, 20(4): 251-260.
[2] Ennaceur C, Laksimi A, Herve C, et al. Monitoring crack growth in pressure vessel steels by the acoustic emission technique and the method of potential difference [J]. International Journal of Pressure Vessels and Piping, 2006, 83(3): 197-204.
[3] 耿荣生, 沈功田, 刘时风. 声发射信号处理与分析技术[J]. 无损检测, 2002, 24(1):22-28.
[4] Chang H, Han E H, Wang H Q, et al. Acoustic emission study of fatigue crack closure of physical short and long cracks for aluminum alloy LY12CZ [J]. International Journal of Fatigue, 2009, 31: 403-407.
[5] Finkel P, Godinez V, Miller R. Electromagnetically induced acoustic emission-novel NDT technique for damage evaluation [C]. American Institute of Physics Conference, 2001, 557: 1747-1754.
[6] Finkel P, Godinez V. Numerical simulations of an electromagnetic of the ultrasonic signal for nondestructive detection of ferromagnetic inclusions and flaws [J]. IEEE Transactions on Magnetics, 2004, 40(4): 2179-2181.
[7] Jin Liang, Liu Suzhen, Yang Qingxin, et al. Application of eddy load in electromagenetic acoustic emission [C]. The 11th International Conference on Electrical Machines and Systems, 2008: 395-397.
[8] 张闯, 刘素贞, 杨庆新, 等. 基于FFT和小波包变换的电磁声发射信号处理[J]. 电工技术学报, 2010, 25(4): 24-28.
[9] Jin Liang, Yang Qingxin, Liu Suzhen. Electromagnetic stimulation of the acoustic emission for fatigue crack detection of the sheet metal [J]. IEEE Transactions on Applied Superconductivity, 2010, 20(3): 1848-1854.
[10] 刘素贞, 杨庆新, 金亮, 等. 电磁声发射技术在无损检测中的应用研究[J]. 电工技术学报, 2009, 24(1): 23-28.
[11] Jin Liang, Yang Qingxin, Liu Suzhen, et al. Enhanced acoustic emission detection induced by electromagnetic stimulation with external magnetic field [J]. IEEE Transactions on Magnetics, 2011, 47(10): 3284-3287. |
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2013, Vol. 28 
