Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Development of Crack Examination Algorithm Using the Linearly Integrated Hall Sensor Array

선형 홀 센서 배열을 사용한 결함 검사 알고리즘 개발

  • Kim, Jae-Jun (Department of Mechanical Engineering, Kyunghee Univ.) ;
  • Kim, Byoung-Soo (Department of Mechanical Engineering, Kyunghee Univ.) ;
  • Lee, Jin-Yi (Department of Control, Instrumentation and Robot Engineering, Chosun Univ.) ;
  • Lee, Soon-Geul (Department of Mechanical Engineering, Kyunghee Univ.)
  • 김재준 (경희대학교 기계공학과) ;
  • 김병수 (경희대학교 기계공학과) ;
  • 이진이 (조선대학교 제어계측로봇공학과) ;
  • 이순걸 (경희대학교 기계공학과)
  • Received : 2010.04.14
  • Accepted : 2010.09.08
  • Published : 2010.11.01
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Abstract

Previous researches show that linearly integrated Hall sensor arrays (LIHaS) can detect cracks in the steel structure fast and effectively This paper proposes an algorithm that estimates the size and shape of cracks for the developed LIHaS. In most nondestructive testing (NDT), just crack existence and location are obtained by processing 1-dimensional data from the sensor that scans the object with relative speed in single direction. The proposed method is composed with two steps. The first step is constructing 2-dimensionally mapped data space by combining the converted position data from the time-based scan data with the position information of sensor arrays those are placed in the vertical direction to the scan direction. The second step is applying designed Laplacian filter and smoothing filter to estimate the size and shape of cracks. The experimental results of express train wheels show that the proposed algorithm is not only more reliable and accurate to detecting cracks but also effective to estimate the size and shape of cracks.

Keywords

References

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