Floating Resonance Method for Precise Evaluation of Bearing Balls
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概要
- 論文の詳細を見る
Although resonant ultrasound spectroscopy is useful for testing the surface and inside of objects, the resonance properties (resonance frequency and mode amplitude ratio) are disturbed by the contact with supports and transducers. To eliminate this disturbance, we propose the floating resonance method in which the resonance property is evaluated after floating the objects, while avoiding contact to supports and transducers. Thus, using laser ultrasonics, completely noncontact resonance measurement is realized for the first time. In a preliminary application to bearing balls, we succeeded in floating an 8-mm-diameter steel bearing ball using controlled air flow and in improving the reproducibility of resonance frequency to better than 0.005%. A defect was detected by observing the difference in resonance frequencies with and without the defect, which was difficult under the supported condition. [DOI: 10.1143/JJAP.41.3498]
- 社団法人応用物理学会の論文
- 2002-05-30
著者
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Ishikawa Satoru
Department Of Materials Processing Graduate School Of Engineering Tohoku University
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Ishikawa Satoru
Department Of Environmental Chemistry Heavy Metal Group Soil Biochemistry Unit National Institute Fo
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Cho Hideo
Department Of Materials Processing Graduate School Of Engineering Tohoku University
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Saito Arata
Department Of Materials Processing Graduate School Of Engineering Tohoku University
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Yamanaka Kazushi
Department Of Applied Physics Faculty Of Engineering University Of Tokyo:(present Address)mechanical
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Ishikawa Satoru
Department Of Applied Physics Graduate School Of Engineering Tohoku University
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