NDLI: A digital moiré fringe method for displacement sensors

Content Provider	Springer Nature Link
Author	Wu, Jian Zhou, Ting ting Yuan, Bo Wang, Li qiang
Copyright Year	2016
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.
Starting Page	946
Ending Page	953
Page Count	8
File Format	PDF
ISSN	20959184
Journal	Journal of Zhejiang University SCIENCE C
Volume Number	17
Issue Number	9
e-ISSN	20959230
Language	English
Publisher	Zhejiang University Press
Publisher Date	2016-10-07
Publisher Place	Hangzhou
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Digital moiré fringe Displacement measurement Grating Computer Science Electrical Engineering Computer Hardware Computer Systems Organization and Communication Networks Electronics and Microelectronics, Instrumentation Communications Engineering, Networks
Content Type	Text
Resource Type	Article
Subject	Signal Processing Computer Networks and Communications Electrical and Electronic Engineering Hardware and Architecture

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