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Parameter Identification and Transition Process Online Calibration Method of Pulsed Eddy Current Receiving Coil Based
Zhiwu Zeng1, Jie Wang1, Xiaoju Huang1
1Construction Branch State Grid Jiangxi Electric Power Co., Ltd., Nanchang 330036, China.
Sensors (Basel, Switzerland)
|July 12, 2025
Summary
This study introduces a novel method for pulsed eddy current (PEC) systems to accurately identify receiving coil parameters. This improves the precision of PEC detection signals and overall system accuracy.
Area of Science:
- Electromagnetism
- Non-destructive Testing
Background:
- Pulsed eddy current (PEC) systems are susceptible to system parameter offsets during detection.
- Accurate system parameter identification is crucial for reliable PEC signal analysis and deconvolution.
Purpose of the Study:
- To develop a method for accurate identification of pulsed eddy current receiving coil parameters.
- To enhance the deconvolution accuracy and overall detection precision of PEC systems.
Main Methods:
- Analysis of receiving system response signals and deconvolution processes.
- Application of a step signal through an excitation coil to alter system response characteristics for parameter identification.
- Utilizing the Newton method for accurate receiving system identification.
- Investigating the impact of matching resistance and parallel capacitor switching on identification accuracy.
Main Results:
- The proposed method efficiently and accurately identifies receiving coil parameters.
- Simulation and experimental results validate the effectiveness of the parameter identification technique.
- Demonstrated improvement in the inversion accuracy of PEC detection signals.
Conclusions:
- The developed method offers an efficient, convenient, and accurate approach for pulsed eddy current receiving coil parameter identification.
- This technique significantly enhances the accuracy of PEC detection and signal inversion.
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