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A Study on the Measurement of Foreign Material in Dissimilar Metal Contact Using Pulse Laser and Confocal Fabry-Perot Interferometer (펄스 레이저와 CFPI를 이용한 이종금속 접촉부의 이물질 측정에 관한 연구)

  • Hong, Kyung-Min;Kang, Young-June;Park, Nak-Kyu
    • Journal of the Korean Society for Nondestructive Testing
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    • v.33 no.2
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    • pp.160-164
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    • 2013

  • A laser ultrasonic inspection system is a non-contact inspection device which generates and measures ultrasonics by using laser beam. A laser ultrasonic inspection system provides a high measurement resolution because the ultrasonic signal generated by a pulse laser beam has a wide-band spectrum and the ultrasonic signal is measured from a small focused spot of a measuring laser beam. In this study, galvanic corrosion phenomenon was measured by non-destructive and non-contact method using the laser. The case of mixed foreign material on the part of corrosion was assumed and laser ultrasonic experiment was conducted. Ultrasonic was generated by pulse laser from the back side of the specimen and ultrasonic signal was acquired from the same location of the front side using continuous wave laser and Confocal Fabry-Perot Interferometer(CFPI). The characteristic of the ultrasonic signal of exist foreign material part was analyzed and the location and size of foreign material was measured.

  • https://doi.org/10.7779/JKSNT.2013.33.2.160 인용 PDF KSCI

국내외 정보

  • Korea Electrical Manufacturers Association
    • NEWSLETTER 전기공업
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    • no.95-2 s.123
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    • pp.10-41
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    • 1995

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