Proceedings of the Korean Institute of Information and Commucation Sciences Conference (한국정보통신학회:학술대회논문집)
- 2008.05a
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- Pages.579-584
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- 2008
Improvement of Signal Processing Circuit for Inspecting Cracks on the Express Train Wheel
고속 신호처리 회로에 의한 고속철도 차륜검사
- Hwang, Ji-Seong (Department of Information and Communication Engineering, Graduate School of Chosun University) ;
- Lee, Jin-Yi (Department of Control and Instrumentation Robot Engineering, Chosun University) ;
- Kwon, Suk-Jin (Korea Railroad Research Institute)
- Published : 2008.05.30
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 an improved signal processing circuits, which uses the multiple amplifying circuits and the crack indicating pulse output system of the previous scan-type magnetic camera. Hall sensors are arrayed linearly, and the wheel is rotated with static speed in the vertical direction to sensor array direction. Each Hall voltages are amplified, converted and immediately operated by using, amplifying circuits, analog-to-digital converters and
고속철도 차륜의 미소결함을 고속 고공간 분해 능으로 측정할 수 있는 새로운 비파괴검사법이 요구되고 있다. 본 연구는 종래의 스캔형 자기카메라를 개선하여, 다중증폭회로와 결함표시를 위한 펄스 발생기를 장착한 신호처리회로를 제안한다. 홀센서를 선형으로 배열하고, 배열의 직각방향으로 차륜이 정속으로 회전하게 하면, 차륜의 답면을 검사할 수 있다. 각각의 홀전압을 증폭하고, AD변환기를 통하여