Journal of Korea Multimedia Society (한국멀티미디어학회논문지)

Korea Multimedia Society (한국멀티미디어학회)
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Sound Monitoring System of Machining using the Statistical Features of Frequency Domain and Artificial Neural Network

주파수 영역의 통계적 특징과 인공신경망을 이용한 기계가공의 사운드 모니터링 시스템

  • Lee, Kyeong-Min (Dept. of IT Convergence and Application Engineering, Pukyong National University) ;
  • Vununu, Caleb (Dept. of IT Convergence and Application Engineering, Pukyong National University) ;
  • Lee, Suk-Hwan (Dept. of Information Security, Tongmyong University) ;
  • Kwon, Ki-Ryong (Dept. of IT Convergence and Application Engineering, Pukyong National University)
  • Received : 2018.07.15
  • Accepted : 2018.07.24
  • Published : 2018.08.31
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Abstract

Monitoring technology of machining has a long history since unmanned machining was introduced. Despite the long history, many researchers have presented new approaches continuously in this area. Sound based machine fault diagnosis is the process consisting of detecting automatically the damages that affect the machines by analyzing the sounds they produce during their operating time. The collected sound is corrupted by the surrounding work environment. Therefore, the most important part of the diagnosis is to find hidden elements inside the data that can represent the error pattern. This paper presents a feature extraction methodology that combines various digital signal processing and pattern recognition methods for the analysis of the sounds produced by tools. The magnitude spectrum of the sound is extracted using the Fourier analysis and the band-pass filter is applied to further characterize the data. Statistical functions are also used as input to the nonlinear classifier for the final response. The results prove that the proposed feature extraction method accurately captures the hidden patterns of the sound generated by the tool, unlike the conventional features. Therefore, it is shown that the proposed method can be applied to a sound based automatic diagnosis system.

Keywords

References

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