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  HomeContents of Chinese Journal of Mechanical Engineering 2004 No.4VISION MEASUREMENT FOR AMPLITUDE OF HIGH FREQUENCY VIBRATION
VISION MEASUREMENT FOR AMPLITUDE

 OF HIGH FREQUENCY VIBRATION

 

Wang Guobao  Wang Shigang  Yu Xinrui  Xu Wei

(College of Mechanical and Energy Engineering, Shanghai Jiaotong University, Shanghai 200030)

 

Abstract: Mathematical modelal are researched in space domain and frequency domain for motion-blurred image. Series of dark stripes can be found on spectrums of motion-blurred images of a vibrating object with high frequency, which is due to zero value of Bessel function. Adding 2-D Fourier transform on a vibration-blurred image recorded by CCD, linear stripes are inspected and located in spectrum images and realize the image measurement of vibration amplitudes. Measurement results can reach sub-pixel precision.

Key words: Motion-blurred image  Spectrum   Bessel function  Stripe  Amplitude measuring

CLC No: TB936  TP391

国家自然科学基金(50390063)和博士点基金(20020248048)资助项目. Received 30102, received in revised form 20030710

 
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