厚肉材に渦電流探傷法を適用するための新しい励磁手法の提唱
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概要
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This paper proposes an innovative excitation system for eddy current testing. The key idea of the system is the suppression of eddy currents on the surface of specimens. A new eddy current probe consisting of four coaxial rectangular tangential exciter coils driven by phase-shifted AC currents and a pickup coil is fabricated as the basis of the system; then numerical simulations and experimental verifications are performed. It is demonstrated that the new probe provides 20% difference between signals due to a 15 mm deep notch and those due to a 20 mm deep one although an excitation frequency of 10 kHz is applied. In contrast, a conventional eddy current probe driven with the same frequency showed as little as 1% difference between signals due to the two notches.
- 一般社団法人 日本非破壊検査協会の論文
一般社団法人 日本非破壊検査協会 | 論文
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