Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Fault Detection and Localization using Wavelet Transform and Cross-correlation of Audio Signal

소음 신호의 웨이블렛 변환 및 상호상관 함수를 이용한 고장 검출 및 위치 판별

  • Ji, Hyo Geun (Department of Mechatronics Engineering, Kyung sung Univ.) ;
  • Kim, Jung Hyun (Department of Mechatronics Engineering, Kyung sung Univ.)
  • 지효근 (경성대학교 메카트로닉스공학과) ;
  • 김정현 (경성대학교 메카트로닉스공학과)
  • Received : 2013.11.14
  • Accepted : 2014.03.20
  • Published : 2014.04.01
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Abstract

This paper presents a method of fault detection and fault localization from acoustic noise measurements. In order to detect the presence of noise sources wavelet transform is applied to acoustic signal. In addition, a cross correlation based method is proposed to calculate the exact location of the noise allowing the user to quickly diagnose and resolve the source of the noise. The fault detection system is implemented using two microphones and a computer system. Experimental results show that the system can detect faults due to artifacts accidentally inserted during the manufacturing process and estimate the location of the fault with approximately 1 cm precision.

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References

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