紀要論文

共振型ECTセンサによる金属中欠損の一可視化法

A method of defect visualization in the metallic materials by resonance type ECT sensor

jpn

18807526

https://doi.org/10.15002/00006889

法政大学情報メディア教育研究センター

法政大学情報メディア教育研究センター研究報告

23

45

48

2010-06-01

Version of Record

可視化情報学会全国講演会(米沢2009)講演論文集

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.

Article