OS0419 Application of Digital Image Correlation Method to AFM Images : Consideration of Out-of-plane Deformation and Accuracy Improvement

2008 ◽  
Vol 2008 (0) ◽  
pp. _OS0419-1_-_OS0419-2_
Author(s):  
Tatsuhiko KUWAHARA ◽  
Nobuyuki SHISHIDO ◽  
Ryosuke MATSUMOTO ◽  
Toru IKEDA ◽  
Noriyuki MIYAZAKI
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Plane Deformation ◽  
Correlation Method ◽  
Image Correlation ◽  
Accuracy Improvement ◽  
Digital Image Correlation Method ◽  
Out Of Plane

Digital Speckle Projection for Vibration Measurement by Applying Digital Image Correlation Method

2006 ◽  
Vol 326-328 ◽  
pp. 99-102 ◽  
Author(s):  
Fu Jun Yang ◽  
Xiao Yuan He
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
High Speed ◽  
Speckle Pattern ◽  
Plane Deformation ◽  
Correlation Method ◽  
Image Correlation ◽  
Vibration Measurement ◽  
Digital Image Correlation Method ◽  
Digital Speckle

Digital image correlation method (DICM) is described as a robust in-plane deformation measuring method due to its simple optical setup and the insensitivity against ambient noise. Based on DICM, digital speckle projection has been developed for shape measurement. This paper explores the possibilities for vibration analysis using digital speckle projection together with DICM. A digital speckle pattern, generated by computer, is projected on an object surface using an LCD projector. Then the dynamic deformation modulated speckle images are captured by a high-speed CCD camera and saved in the computer. By using the self-developed temporal sequence digital images correlation algorithm, the deformation and vibration mode can be analyzed quantitatively. The proposed method avoids using stroboscopic or laser illumination and simplifies the experimental setup for vibration measurement, while it is time-consuming thanks to calculating a large amount of correlation coefficients. The experimental performance on a harmonic-vibrating cantilever beam well demonstrates the validity of the new method.

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