CLC number: TH741; TN911.7
On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
Crosschecked: 2016-08-24
Cited: 0
Clicked: 6315
Jian Wu, Ting-ting Zhou, Bo Yuan, Li-qiang Wang. A digital moiré fringe method for displacement sensors[J]. Frontiers of Information Technology & Electronic Engineering, 2016, 17(9): 946-953.
@article{title="A digital moiré fringe method for displacement sensors",
author="Jian Wu, Ting-ting Zhou, Bo Yuan, Li-qiang Wang",
journal="Frontiers of Information Technology & Electronic Engineering",
volume="17",
number="9",
pages="946-953",
year="2016",
publisher="Zhejiang University Press & Springer",
doi="10.1631/FITEE.1500270"
}
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%DOI 10.1631/FITEE.1500270
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T1 - A digital moiré fringe method for displacement sensors
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A1 - Ting-ting Zhou
A1 - Bo Yuan
A1 - Li-qiang Wang
J0 - Frontiers of Information Technology & Electronic Engineering
VL - 17
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SP - 946
EP - 953
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Y1 - 2016
PB - Zhejiang University Press & Springer
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DOI - 10.1631/FITEE.1500270
Abstract: In this study, a displacement measurement method based on digital moiré; fringe is described and experimentally demonstrated. The method is formed by only one grating with a constant pitch. First, the magnified grating image is received by an imaging array and is sent to a computer. Then, the digital moiré; fringes are generated by overlaying the grating image with its mirrored one. Finally, a specifically designed algorithm is used to obtain the fringes’ phase difference before and after movement and calculate the displacement. This method has the effects of amplifying displacement and averaging the grating lines error, the same as the traditional moiré technique using two pieces of gratings. At the same time, the proposed system is much easier to assemble and the measurement resolution can be set more flexibly. One displacement measuring system based on this method was built up. Experiment results show that its measurement errors are less than 0.3 µm and less than 0.12 µm at the resolutions of 0.1 µm and 0.03 µm, respectively.
The authors present a well-known digital Moiré fringe method, which the authors applied like a displacement sensor and claim easier to assemble and more flexible to set the resolution displacement measuring system using a single grating. Because this method does not need complex grating interference system, it has the advantage of being easy to operate. The proposal is presented in a generally clear manner. Then the author shows the displacement calculation and its resolutions. Finally some experiments and quality of the Moiré fringes are presented.
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