Automatic detection method for quality of eddy current detection signal of heat-exchanger tube
A technology of heat exchange tube and signal quality, applied in measurement devices, material magnetic variables, instruments, etc., can solve problems such as unqualified eddy current detection signals
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[0031] A heat exchange tube eddy current detection signal quality automatic detection method, comprising the following steps:
[0032] S1: Basic feature detection of eddy current defect signal:
[0033] S1.1: Collect the eddy current signal of the calibration tube, which can be collected separately or selected from the detection signal of the whole heat transfer tube;
[0034] S1.2: Adjust the phase of all differential channel through-hole signals in the calibration tube signal obtained in S1.1 to a fixed angle, such as 40 degrees, and select the maximum peak-to-peak measurement method for the measurement method;
[0035] S1.3: Verify the phase angles of internal defect signals and trauma defect signals of all differential channels in the signal in the calibration tube. It is required that the phase angles of internal defect signals meet 0 to 40 degrees, and the phase angles of trauma defect signals meet 40 degrees to 180 degrees. If it is not satisfied, it is considered that...
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