Abstract
ECT (eddy current testing) is extensively used to inspect such as elevator, escalator, and airplane, nuclear electric and power plant without any destruction. This paper proposes a method of resonance type ECT sensor system which makes it possible to detect the defect of metallic plate. Operating principle of this system is based on the essential nature of parallel resonant electrical circuit. When the primary coil is working as a sensing part and the secondary coil, i.e. a target metallic material, is magnetically coupled with the primary coil, the primary resonance frequency and impedance of the ECT sensor system greatly depend on the secondary impedance change caused by a defect such as cracks. By means of a simple eddy current property, we have tried to visualize the capacitance arisen in cracks of which the traditional ECT sensor system neglects this capacitance effect. Even though more precise experimentally proof is necessarily, we have succeeded in visualizing a crack effect in the target thin metallic materials.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
