Quadrature Demodulation Circuit for Two-directional Eddy Current Test of Defects in Steel Block

WU Bin; WANG Shuyu; LIU Xiucheng; FENG Huan; YANG Jieming; HE Cunfu

doi:10.11936/bjutxb2016090073

Journal of Beijing University of Technology > 2018 > 44(3): 363-368. > DOI: 10.11936/bjutxb2016090073

WU Bin, WANG Shuyu, LIU Xiucheng, FENG Huan, YANG Jieming, HE Cunfu. Quadrature Demodulation Circuit for Two-directional Eddy Current Test of Defects in Steel Block[J]. Journal of Beijing University of Technology, 2018, 44(3): 363-368. DOI: 10.11936/bjutxb2016090073

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Quadrature Demodulation Circuit for Two-directional Eddy Current Test of Defects in Steel Block

College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China

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Received Date: September 27, 2016
Available Online: August 03, 2022
Published Date: March 09, 2018

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Abstract

Abstract

To solve the problem of two-directional eddy current signal demodulation, a quadrature demodulation circuit for low frequency range application was designed. The circuit includes a phase shifter, an analog multiplier and a low-pass filter. Their performances were tested in experiments. The circuit can shift the input signal (in the frequency range of 10-30 kHz) phase by 90° by adjusting the slide rheostat to modify the input and output impedance of the two-stage amplifier. The DC bias characteristics of the analog multiplier were also tested. Finally, the quadrature demodulation circuit together with the two-directional eddy current probe was applied for detecting notches with various depths in steel block. Results show that the DC bias voltage slightly fluctuates in its operation frequency range. The mutual correlation coefficient of the calculated and tested signal is about 0.955 1 after amplitude compensation being applied to the tested signal. The relative error in amplitude and phase demodulation results obtained from the circuit is estimated as 13% and 8%, respectively. A notch with a depth of 7 mm can be detected, and both the demodulated amplitude and phase of the eddy current signal tend to approximation increase when the depth of the notches increases.
- two-directional eddy current,
- quadrature demodulation,
- phase shifter,
- analog multiplier

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References

[1]	任吉林, 林俊明.电磁无损检测[M], 北京:科学出版社, 2008:80-115.
[2]	WANG J, YUSA N, FUKUTOMI H, et al. Low frequency eddy current inspection of wall-thinning of large pipes by bobbin coils[C]//Nondestructive Evaluation/Testing (FENDT). New York: IEEE, 2014: 172-175. http://ieeexplore.ieee.org/document/6928256/
[3]	CARDOSO F A, ROSADO L, FERREIRA R, et al. Magnetic tunnel junction based eddy current testing probe for detection of surface defects[J]. Journal of Applied Physics, 2013, 115(17):17E516-17E516-3. doi: 10.1063/1.4864045
[4]	JONEIT D, NADLER M, HEUER H. Correction of eddy current measurements to obtain accordance with simulation results[J]. NDT & E International, 2014, 62(2):167-171. https://www.sciencedirect.com/science/article/pii/S0963869513001643
[5]	JANOUSEK L, YUSA N, MIYA K. Utilization of two-directional AC current distribution for enhancing sizing ability of electromagnetic nondestructive testing methods[J]. NDT & E International, 2006, 39(7):542-546. https://www.sciencedirect.com/science/article/pii/S0963869506000156
[6]	左勇斌, 陈振茂.基于多线圈激励的深裂纹涡流定量检测方法[J].无损检测, 2009, 31(12):925-927. http://www.cnki.com.cn/Article/CJFDTotal-WSJC201411004.htm ZUO Y B, CHEN Z M. Based on the eddy current coil encouraging more deep crack quantitative detection method[J]. Journal of Nondestructive Testing, 2009, 31(12):925-927. (in Chinese) http://www.cnki.com.cn/Article/CJFDTotal-WSJC201411004.htm
[7]	李少华, 白红燕.涡流法电阻率测试仪的设计[J].国外电子测量技术, 2013, 32(7):62-65. http://www.cnki.com.cn/Article/CJFDTOTAL-GWCL201307019.htm LI S H, BAI H Y. The design of the eddy current method resistivity tester[J]. Journal of Foreign Electronic Measurement Technology, 2013, 32(7):62-65. (in Chinese) http://www.cnki.com.cn/Article/CJFDTOTAL-GWCL201307019.htm
[8]	高军哲, 潘孟春, 罗飞路.应用于微弱涡流信号检测的正交锁定放大器设计[J].无损检测, 2010, 32(9):734-737. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=wsjc201009021&dbname=CJFD&dbcode=CJFQ GAO J Z, PAN M C, LUO F L. The design of orthogonal lock-in amplifier applied to weak eddy current signal detection[J]. Journal of Nondestructive Testing, 2010, 32(9):734-737. (in Chinese) http://kns.cnki.net/KCMS/detail/detail.aspx?filename=wsjc201009021&dbname=CJFD&dbcode=CJFQ
[9]	HELIFA B, OULHADJ A, BENBELGHIT A, et al. Detection and measurement of surface cracks in ferromagnetic materials using eddycurrent testing[J]. NDT & E International, 2006, 39(5):384-390. https://www.sciencedirect.com/science/article/pii/S096386950600003X
[10]	郭肖鹏. 基于GMR的电涡流检测仿真分析[D]. 天津: 天津大学, 2013. http://www.wanfangdata.com.cn/details/detail.do?_type=degree&id=D439701 GUO X P. Based on the GMR eddy current testing simulation analysis[D]. Tianjin: Tianjin University, 2013. (in Chinese) http://www.wanfangdata.com.cn/details/detail.do?_type=degree&id=D439701
[11]	安寅, 陈棣湘, 田武刚.基于TMR的平面电磁传感器仿真设计[J].无损检测, 2016, 38(4):33-37. doi: 10.11973/wsjc201604009 AN Y, CHEN D X, TIAN W G. The plane electromagnetic sensor simulation design based on the TMR[J]. Journal of Nondestructive Testing, 2016, 38(4):33-37. (in Chinese) doi: 10.11973/wsjc201604009

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Quadrature Demodulation Circuit for Two-directional Eddy Current Test of Defects in Steel Block