The experimental study on Doppler echo signals with different scattering surfaces for velocity measurement

Leng-ping Wang; Di Feng; Pan Ou; De-zhao Yang

doi:10.1117/12.900727

19 August 2011 The experimental study on Doppler echo signals with different scattering surfaces for velocity measurement

Leng-ping Wang, Di Feng, Pan Ou, De-zhao Yang

Author Affiliations +

Proceedings Volume 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging; 81922N (2011) https://doi.org/10.1117/12.900727
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

Abstract

Laser Doppler velocimetry has the ability to measure speed and surface vibrations non-intrusively with high precision. In this study the Doppler spectrum shift and spectrum broadening of echo signals by moving targets are investigated. The interaction between moving object and the laser beam of laser Doppler velocimetry have been described by varying rotating velocity, the angular velocity, distance and incident facula. By using different scattering surfaces, such as Polytetrafluoroethylene (PTFE) and sandpaper with different grain sizes, the characteristics of echo signals' Doppler spectra have been studied experimentally in detail. The results show that Doppler spectrum distribution is changed with different scattering surfaces. Meanwhile, in order to get a high measuring accuracy, the moving object's scattering characteristics must be considered carefully.

Citation Download Citation

Leng-ping Wang, Di Feng, Pan Ou, and De-zhao Yang "The experimental study on Doppler echo signals with different scattering surfaces for velocity measurement", Proc. SPIE 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, 81922N (19 August 2011); https://doi.org/10.1117/12.900727

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