Active Damped Oscillation Calibration Method for Receiving Coil Transition Process Based on Early Acquisition of Pulsed Eddy Current Testing Signal

Fei Wang, Su Xu, Liqun Yin, Xiaobao Hu, Ming Ma, Bin Jia and Jingang Wang ()
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Fei Wang: Baotou Power Supply Branch of Inner Mongolia Electric Power (Group) Co., Ltd., Baotou 014030, China
Su Xu: Baotou Power Supply Branch of Inner Mongolia Electric Power (Group) Co., Ltd., Baotou 014030, China
Liqun Yin: Baotou Power Supply Branch of Inner Mongolia Electric Power (Group) Co., Ltd., Baotou 014030, China
Xiaobao Hu: Baotou Power Supply Branch of Inner Mongolia Electric Power (Group) Co., Ltd., Baotou 014030, China
Ming Ma: Baotou Power Supply Branch of Inner Mongolia Electric Power (Group) Co., Ltd., Baotou 014030, China
Bin Jia: Baotou Power Supply Branch of Inner Mongolia Electric Power (Group) Co., Ltd., Baotou 014030, China
Jingang Wang: State Key Laboratory of Power Transmission Equipment Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China

Energies, 2025, vol. 18, issue 17, 1-15

Abstract: As a common signal sensing device in pulsed eddy current detection, coil sensors often have parameter offset problems in practical applications. The error in the receiving coil parameters will have a great impact on the early signal. In order to ensure the accuracy of the early signal, this paper first analyzes the response characteristics of the receiving coil and the influence of the coil parameters on the accuracy of signal deconvolution and establishes the mathematical relationship between the response signal and the characteristic parameters, and between the characteristic parameters and the receiving coil parameters under active underdamped oscillation. Subsequently, the parameter feature extraction errors under different state switching capacitors were compared through simulation analysis, the state switching capacitor value was determined, and the receiving coil parameter solution method based on the Levenberg–Marquardt (LM) algorithm was determined based on the parameter feature extraction results. The experimental results demonstrate that the proposed method achieves a capacitance estimation error of just 0.0159% and an inductance error of 0.158%, effectively minimizing early signal distortion and enabling precise identification of receiving coil parameters.

Keywords: active underdamped oscillation; pulsed eddy current; Levenberg–Marquardt algorithm; signal calibration; receiving coil (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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