Yoke Tube Crack Inspection by Using Acoustic Resonance Spectral Analysis

음향 공진 스펙트럼 분석을 통한 요크 튜브 크랙 검사

  • Yeom, Woo-Jung (Department of Electronics Engineering, Incheon National University) ;
  • Hong, Yeon-Chan (Department of Electronics Engineering, Incheon National University) ;
  • Kim, Jin-Young (Department of Physics, Incheon National University) ;
  • Kang, Joonhee (Department of Physics, Incheon National University)
  • 염우정 (국립인천대학교 전자공학과) ;
  • 홍연찬 (국립인천대학교 전자공학과) ;
  • 김진영 (국립인천대학교 물리학과) ;
  • 강준희 (국립인천대학교 물리학과)
  • Received : 2018.07.13
  • Accepted : 2018.10.05
  • Published : 2018.10.31


Due to the development of nondestructive testing techniques, methods of inspecting cracks in mechanical parts have drawn attentions. Among various non-destructive testing methods the acoustic resonance method which analyzes the natural frequencies has been developed into a technique suitable for the prompt judgements of the existence of the defects in the mechanical parts. In this study, we investigated the crack inspection technique to examine the cracks in the yoke tubes by using the acoustic resonance method and realized the system to quickly detect the cracks. A 24bit ADC circuit and an MCU were installed for the smooth data collection, and a TCP / IP communication interface was configured for the data communication with PC. We used a microphone as a sensor measuring the vibrations. We constructed an analysis software to obtain the frequency spectra of the vibrations, to find the existence of the cracks, and to feedback to the user. Tests were conducted using the yoke tubes manufactured in the real industrial field. The tests were successfully conducted to distinguish the good products from the defective (cracked) products and confirmed that they can be employed in the actual industrial field.


Natural frequency;Crack;Yoke tube;Nondestructive;Acoustic


Supported by : 인천대학교


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