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The study of the nonlinear correction of the FMCW absolute distance measurement using frequency-sampling and precision analysis

Conference 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.

Publication Date


  • 2014

Citation


  • Lu, C., Gan, Y., Chen, F., Liu, B., Zhuang, Z., Xu, X., & Liu, G. (2014). The study of the nonlinear correction of the FMCW absolute distance measurement using frequency-sampling and precision analysis. In Proceedings of SPIE - The International Society for Optical Engineering Vol. 9297. doi:10.1117/12.2072141

Scopus Eid


  • 2-s2.0-84923100534

Volume


  • 9297

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.

Publication Date


  • 2014

Citation


  • Lu, C., Gan, Y., Chen, F., Liu, B., Zhuang, Z., Xu, X., & Liu, G. (2014). The study of the nonlinear correction of the FMCW absolute distance measurement using frequency-sampling and precision analysis. In Proceedings of SPIE - The International Society for Optical Engineering Vol. 9297. doi:10.1117/12.2072141

Scopus Eid


  • 2-s2.0-84923100534

Volume


  • 9297