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Proceedings Paper

The study of the nonlinear correction of the FMCW absolute distance measurement using frequency-sampling and precision analysis
Author(s): Cheng Lu; Yu Gan; Fengdong Chen; Bingguo Liu; Zhitao Zhuang; Xinke Xu; Guodong Liu
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Paper Abstract

This article uses the external cavity laser to realize FMCW high precision absolute distance measurement, as the external cavity laser owns the advantage of large tuning range of frequency. Firstly, aim at the problem of nonlinear tuning of the external cavity laser, a study of method of frequency-sampling has been shown. Secondly, in this article the mathematical model of the absolute dis tance measurement system has been established, and the sources of the errors of the FMCW absolute distance measurement has been analyzed, and the accuracy model has been established. Finally, a ball which is put at a distance about 3 meters is measured, and the random error is 0.3479μm, the standard uncertainty of measurement system is 0.3479μm+3.141Rppm.

Paper Details

Date Published: 3 December 2014
PDF: 8 pages
Proc. SPIE 9297, International Symposium on Optoelectronic Technology and Application 2014: Laser and Optical Measurement Technology; and Fiber Optic Sensors, 929712 (3 December 2014); doi: 10.1117/12.2072141
Show Author Affiliations
Cheng Lu, Harbin Institute of Technology (China)
Yu Gan, Harbin Institute of Technology (China)
Fengdong Chen, Harbin Institute of Technology (China)
Bingguo Liu, Harbin Institute of Technology (China)
Zhitao Zhuang, Harbin Institute of Technology (China)
Xinke Xu, Harbin Institute of Technology (China)
Guodong Liu, Harbin Institute of Technology (China)


Published in SPIE Proceedings Vol. 9297:
International Symposium on Optoelectronic Technology and Application 2014: Laser and Optical Measurement Technology; and Fiber Optic Sensors
Jurgen Czarske; Shulian Zhang; David Sampson; Wei Wang; Yanbiao Liao, Editor(s)

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