초고속 스캔형 자기카메라에 의한 고속열차 차륜 탐상

다국어 초록 (Multilingual Abstract)

A novel nondestructive testing (NDT) system, which is able to detect a crack with high speed and high spatial resolution, is urgently required for inspecting small cracks on express train wheels. This paper proposes a high speed scan type magnetic camera, which uses the multiple amplifying circuits and the crack indicating pulse output system. The linearly integrated Hall sensors are arrayed in parallel, and the Hall voltages from each sensor in the scanning direction are obtained and amplified. High-speed NDT can be achieved by using the exclusive analog-digital converter and micro-processor because the ∂VH/∂x value, which provides the most important crack information, can be obtained by buffering and calculating. The effectiveness of the novel method was verified by examine using cracks on the wheel specimen model.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 원리
• 3. 실험 및 고찰
• 4. 결론
• 후기
• 참고문헌

참고문헌 (Reference)

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• 2 권석진, "비파괴적 표면조직검사법과 파괴역학 특성에 따른 고속철도용 차륜 답면의 손상 평가" 대한기계학회 31 (31): 756-763, 2007
• 3 Lee, J. Y., "The QNDE Using Image Processing of the Magnetic Camera" 20 (20): 4625-4630, 2006
• 4 Lee, J. Y., "The Detection Probability Improvement of the Far-side Crack on the High Lift-off Using the magnetic Camera" 20 (20): 4631-4636, 2006
• 5 Hwang, J. S., "Scan Type Magnetic Camera Images with a High Spatial Resolution for NDT Obtained by Using a Linearly Integrated Hall Sensor Array" 1-6, 2007
• 6 Lee, J. Y., "Nondestructive Testing and Crack Evaluation of Ferromagnetic Material by Using the Linearly Integrated Hall Sensor Array" 2008
• 7 Jun, J. W., "NDT of a Nickel Coated Inconel Specimen Using by the Complex Induced Current-Magnetic Flux Leakage Method and Linearly Integrated Hall Sensor Array" 27 : 375-382, 2007
• 8 Rainer P., "NDT Techniques for Railroad Wheel and Gauge Corner Inspection" 37 : 89-94, 2004
• 9 Jinyi Lee, "Modeling of a Scan Type Magnetic Camera Image Using the Improved Dipole Model" 대한기계학회 20 (20): 1691-1701, 2006
• 10 Lee, J. Y., "Magnetic Flux Density Apparatus for, E.G., Detecting an Internal Crack of a Metal or a Shape of the Metal," US patents 6,683,452 B2"
• 11 Miyamoto., "Investigation of the Derailment Accident of the Express Train" Ken-yusha Inc Press 5-, 1999
• 12 Choi, S. H., "Improvement of Crack Detection Probability by Using Magnetic Camera and Image Processing" 353 : 2375-2378, 2007
• 13 Jun, J. W., "Development of Signal Processing Circuit of a Magnetic Camera for the NDT of a Paramagnetic Material" 353 : 2379-2382, 2007
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