Related Experiment Video
Updated: Jun 20, 2026

Micro/Nano-scale Strain Distribution Measurement from Sampling Moiré Fringes
Published on: May 23, 2017
Fold-ray videometrics method for the deformation measurement of nonintervisible large structures
Qifeng Yu1, Guangwen Jiang, Sihua Fu
1College of Opto-Electronic Science and Engineering, National University of Defense Technology, Changsha, Hunan, 410073, China. yuqifeng@vip.sina.com
Abstract:
An optical measurement method, the fold-ray videometrics method, that is applicable to the deformation measurement of large structures is proposed. Through an illustration of ship deformation, the principle of fold-ray videometrics and the composition of the deformation measurement system are introduced. The fold-ray videometrics method is able to transfer or relay three-dimensional geometric information with a fold-ray optical path and thus is capable of real-time measurement of three-dimensional positions, attitudes, and deformations between nonintervisible objects and those of intervisible objects with a very large angle of view. The proposed method therefore has the potential to be applied in deformation measurement of large structures.
Related Concept Videos
Deformation of Member under Multiple Loadings
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
Deformation of a Beam under Transverse Loading
The insights from the bending moment diagram extend to...
Deformation in a Circular Shaft

