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김성훈(Seunghoon Kim),백경윤(Kyungyun Baek),박노식(Nosik Park),민한기(Hangi Min),정상화(Sanghwa Jung),양인영(Inyoung Yang) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, For nondestructive evaluation of Ferrule and Ball lens, we made of the measuring system by RUS. We evaluated existence of flaws through comparison with resonant frequency of Ferrule and Ball lens. The objective of the paper is to evaluate defect and shape error by using nondestructive evaluation method with Resonant Ultrasound Spectroscopy(RUS). RUS system is configured of spectrum analyzer, power amplifier, PZT sensor and support frame. For defect evaluation by the RUS, we performed to measure natural frequency of Ferrule, both acceptable and cracked. In the Ball lens, we performed to investigate relationship between frequency measuring parameter(β) and mass of each specimens. And then, in the case of Ferrule, the resonant frequency of cracked-Ferrule existed to the high level frequency band than acceptable-Ferrule. p increase as the mass increase.