Deep defect quantifying method based on eddy rotating probe signal
A technology of rotating probe and defect depth, which is applied in the field of nuclear power plant operation, can solve problems such as the inability to determine the defect depth, and achieve the effect of solving drift
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[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0029] A defect depth quantification method based on eddy current rotating probe signal, comprising the following steps:
[0030] Step 1. Collect and calibrate defect impedance change vector signals
[0031] By setting calibration tubes with known heat transfer crack defects of artificially simulated steam generators, collecting calibration defect impedance change vector signals of these calibration tubes;
[0032] The defects are artificial electric spark grooves of different depths to simulate crack defects of actual heat transfer tubes;
[0033] Step 2. Defect signal differential processing
[0034] The differential processing calculation formula is as follows:
[0035] E. c (t)=E a (t)-E a (t+t 0 )
[0036] where E a (t) is the defect impedance change vector signal changing with time t; E a (t+t 0 ) for E a (t) after t 0 The defect impe...
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