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http://dx.doi.org/10.5762/KAIS.2018.19.10.108

Yoke Tube Crack Inspection by Using Acoustic Resonance Spectral Analysis  

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)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.19, no.10, 2018 , pp. 108-114 More about this Journal
Abstract
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.
Keywords
Natural frequency; Crack; Yoke tube; Nondestructive; Acoustic;
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