Journal of the Korean Society for Nondestructive Testing (비파괴검사학회지)

The Korean Society for Nondestructive Testing (한국비파괴검사학회)
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Review of Non-Destructive Evaluation Technologies for Rail Inspection

철도 레일의 결함 검출을 위한 비파괴탐상 기술

  • 한순우 (한국철도기술연구원 신교통연구본부) ;
  • 조승현 (한국표준과학연구원 안전측정센터)
  • Received : 2011.04.26
  • Accepted : 2011.08.03
  • Published : 2011.08.30
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Abstract

For railway safety, it is very important to detect damages of rails at their early stage because any undetected damage in a rail can break the rail and cause a serious railway accident. In this paper, several NDT applicable to rail inspections are described. Major damage types in rails are discussed first and the rail inspection technology using conventional piezoelectric ultrasonic transducers, which is widely adopted for damage detection of rails, is explained. Other NDT being researched or tested for rail inspection are also discussed as complementary technologies to the concurrent contact type ultrasonic inspection. Characteristics of each rail inspection technologies are evaluated in order to provide requirements for future development of a new rail inspection method.

철도 레일의 주기적인 탐상은 레일 결함으로 인해 발생할 수 있는 철도 중대사고를 미연에 방지할 수 있는, 철도 안전 유지의 중요한 요소 중 하나이다. 본 논문은 현재 철도 레일 탐상에 적용되고 있거나, 적용을 위해 연구 중인 비파괴탐상 기법들에 관해 기술하였다. 레일에 발생하는 결함 유형에 대해 우선 언급하였고, 레일 탐상에 가장 많이 적용되고 있는 압전형 탐촉자 기반의 초음파탐상 기술에 대해 정리하였다. 접촉식 초음파 레일 탐상 기술에 대한 대안으로서 연구 중이거나 시험 중인 비파괴탐상 기법들에 대해 기술하고, 각 기법 별로 레일의 표면 및 내부 결함 검출 가능 여부에 대해 살펴보았으며 여러 탐상 기법들에 대한 비교를 통해 향후 레일 탐상 기술 개발에 활용하고자 하였다.

Keywords

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