• Title/Summary/Keyword: measuring the vibration

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Automatic Q.C. of Electric Grinder using Vibration Signal (진동측정에 의한 전동공구 양산라인의 품질관리 자동화)

  • 이봉현;최연선
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 1998.04a
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    • pp.173-178
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    • 1998

  • An automatic Q. C. tester for a production line of electric grinder is developed using vibration signals. The methods of measuring and analyzing the vibration signals are found through several experiments at laboratory and production line. The experiments show that checking a vibration signal at running condition only, without any sound signal, is enough to judge whether the product is good or not. The Q. C. tester is made of accelerometer and PC. Measured vibration signal using accelerometer is transmitted to PC through A/D board. Vibration level are calculated using FFT algorithm in PC for already selected five frequency bands, which can specify the cause of fault. The Judging criteria of vibration levels of each bands are decided through a lot of experiment with the comparison of manual judgement.

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A fast high-resolution vibration measurement method based on vision technology for structures

  • Son, Ki-Sung;Jeon, Hyeong-Seop;Chae, Gyung-Sun;Park, Jae-Seok;Kim, Se-Oh
    • Nuclear Engineering and Technology
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    • v.53 no.1
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    • pp.294-303
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    • 2021

  • Various types of sensors are used at industrial sites to measure vibration. With the increase in the diversity of vibration measurement methods, vibration monitoring methods using camera equipment have recently been introduced. However, owing to the physical limitations of the hardware, the measurement resolution is lower than that of conventional sensors, and real-time processing is difficult because of extensive image processing. As a result, most such methods in practice only monitor status trends. To address these disadvantages, a high-resolution vibration measurement method using image analysis of the edge region of the structure has been reported. While this method exhibits higher resolution than the existing vibration measurement technique using a camera, it requires significant amount of computation. In this study, a method is proposed for rapidly processing considerable amount of image data acquired from vision equipment, and measuring the vibration of structures with high resolution. The method is then verified through experiments. It was shown that the proposed method can fast measure vibrations of structures remotely.

  • https://doi.org/10.1016/j.net.2020.06.019 인용 PDF KSCI