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Title |
Non-contact Impact-Echo Based Detection of Damages in Concrete Slabs Using Low Cost Air Pressure Sensors
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Keywords |
충격-반향기법 ; 비접촉 측정 ; 저비용 음압 센서 ; 다이나믹 마이크로폰 Impact-echo ; Contactless sensing ; Low cost air pressure sensor ; Dynamic microphone |
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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.
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