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Non-contact Impact-Echo Based Detection of Damages in Concrete Slabs Using Low Cost Air Pressure Sensors

저비용 음압센서를 이용한 콘크리트 구조물에서의 비접촉 Impact-Echo 기반 손상 탐지

  • Received : 2011.01.20
  • Accepted : 2011.02.25
  • Published : 2011.05.30

Abstract

The feasibility of using low cost, unpowered, unshielded dynamic microphones is investigated for cost effective contactless sensing of impact-echo signals in concrete structures. Impact-echo tests on a delaminated concrete slab specimen were conducted and the results were used to assess the damage detection capability of the low cost system. Results showed that the dynamic microphone successfully captured impact-echo signals with a contactless manner and the delaminations in concrete structures were clearly detected as good as expensive high-end air pressure sensor based non-contact impact-echo testing.

본 논문에서는 비접촉식 충격-반향 기법을 이용한 콘크리트 구조물의 손상 탐지에 있어서 비용 효율성을 높이기 위한 다이나믹 마이크로폰의 적용 가능성에 대하여 알아보았다. 박리 손상이 인공적으로 모사된 콘크리트 슬래브 실험체에 대하여 비접촉 충격-반향 실험을 다이나믹 마이크로폰을 이용하여 수행하였으며 저비용 센서 시스템의 손상 탐지 성능을 분석하였다. 실험 결과 다이나믹 마이크로폰으로 의미있는 신호의 측정이 가능하며, 또한 콘크리트의 박리 손상도 고성능 음압 센서만큼 명확하게 검출 가능하다는 것을 알 수 있었다.

Keywords

References

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