A Temperature Drift Compensation Method for Pulsed Eddy Current Technology

Pulsed eddy current (PEC) technology is another important non-contact nondestructive testing technology for defect detection. However, the temperature drift of the exciting coil has a considerable influence on the precision of PEC testing. The objective of this study is to investigate the temperature drift effect and reduce its impact. The temperature drift effect is analyzed theoretically and experimentally. The temperature drift effect on the peak-to-peak values of the output signal is investigated, and a temperature compensation method is proposed to reduce the effect of temperature variation. The results show that temperature drift has a negative impact on PEC testing and the temperature compensation method can effectively reduce the effect of temperature drift.

[1]  Cheng-Chi Tai,et al.  Pulsed eddy-current measurement of a conducting coating on a magnetic metal plate , 2002 .

[2]  Chong-Oh Kim,et al.  The Pulsed Eddy Current Differential Probe to Detect a Thickness Variation in an Insulated Stainless Steel , 2010 .

[3]  Zhihua Feng,et al.  Ultrastable and highly sensitive eddy current displacement sensor using self-temperature compensation , 2013 .

[4]  J. C. Moulder,et al.  Pulsed Eddy-Current Measurements of Corrosion and Cracking in Aging Aircraft , 1997 .

[5]  H. Zhu,et al.  Pulsed eddy current signal denoising based on singular value decomposition , 2016 .

[6]  Y. Le Bihan,et al.  Lift-off and tilt effects on eddy current sensor measurements: a 3-D finite element study , 2002 .

[7]  V. K. Babbar,et al.  PULSED EDDY CURRENT THICKNESS MEASUREMENT OF SELECTIVE PHASE CORROSION ON NICKEL ALUMINUM BRONZE VALVES , 2010 .

[8]  Wei Li,et al.  Ultrastable eddy current displacement sensor working in harsh temperature environments with comprehensive self-temperature compensation , 2014 .

[9]  Catalin Mandache,et al.  Transient and harmonic eddy currents: Lift-off point of intersection , 2006 .

[10]  Gui Yun Tian,et al.  An approach to reduce lift-off noise in pulsed eddy current nondestructive technology , 2014 .

[11]  Yunze He,et al.  Pulsed eddy current technique for defect detection in aircraft riveted structures , 2010 .

[12]  R. W. Baines,et al.  The research of inhomogeneity in eddy current sensors , 1998 .

[13]  Junzhe Gao,et al.  Defect classification based on rectangular pulsed eddy current sensor in different directions , 2010 .

[14]  Gui Yun Tian,et al.  Simulation based on optimisation of pulsed eddy current probe design , 2010 .

[15]  Gui Yun Tian,et al.  Reduction of lift-off effects for pulsed eddy current NDT , 2005 .

[16]  Gui Yun Tian,et al.  The pulsed eddy current response to applied loading of various aluminium alloys , 2010 .

[17]  Jun Wu,et al.  Temperature compensation of eddy current sensor based on temperature-voltage model , 2016, 2016 12th World Congress on Intelligent Control and Automation (WCICA).

[18]  Junzhe Gao,et al.  Defect identification and evaluation based on three-dimensional magnetic field measurement of pulsed eddy current , 2009 .

[19]  Guan Jia,et al.  Investigation of signal features of pulsed eddy current testing technique by experiments , 2013 .

[20]  Tammana Jayakumar,et al.  Optimisation of pulsed eddy current probe for detection of sub-surface defects in stainless steel plates , 2015 .