Bridge Deflection Measurement Using Digital Image Correlation with Camera Movement Correction
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- Yoneyama Satoru
- Department of Mechanical Engineering, Aoyama Gakuin University
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- Ueda Hiroki
- Department of Mechanical Engineering, Aoyama Gakuin University
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抄録
When displacement measurement by digital image correlation is performed in outside for the inspection of real structures, the position and the direction of a camera are often changed slightly because of wind, oscillations and the lack of stability of ground. In order to realize the bridge deflection measurement by digital image correlation, a method for correcting the effect of camera movement is proposed in this study. The relationship between images before and after the camera movement is described by an equation of perspective transformation. The unknown coefficients of the equation are determined from undeformed regions of the images. Then, the effect of the camera movement is eliminated by using the perspective transformation. The effectiveness is validated by applying the proposed method to the rigid body rotation and translation measurement of a planar specimen, the deflection measurement of a wide-flange beam, and the bridge deflection measurement. Results show that the effect of the camera movement can be corrected by the proposed method. It is emphasized that noncontact displacement measurement is possible by simple and easy procedure with digital image correlation for the structural evaluation of infrastructures.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 53 (2), 285-290, 2012
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390282679225838080
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- NII論文ID
- 10030258867
- 130004454940
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 023407852
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- 使用不可