Study of self-mixing interference signal processing based on time-frequency analysis

LIU Sheng-gang; LI Ze-ren; LIU Qiao

doi:10.3969/j.issn.1001-3806.2009.06.019

To overcome the limitation of fringe counting and phase analysis,a new method based on the time-frequency analysis is proposed to process the self-mixing interference signal.The frequency of the self-mixing interference signal is acquired by time-frequency analysis,and this frequency is equal to the Doppler shift,so the velocity of external object is gained easily.The simulation experiments show that the proposed method is very easy,effective,and accurate.

Study of self-mixing interference signal processing based on time-frequency analysis

Corresponding author: LI Ze-ren, zeren109@21cn.com;

1. Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China

Received Date: 2008-09-19

Accepted Date: 2008-10-19

Available Online: 2009-12-25

Abstract: To overcome the limitation of fringe counting and phase analysis,a new method based on the time-frequency analysis is proposed to process the self-mixing interference signal.The frequency of the self-mixing interference signal is acquired by time-frequency analysis,and this frequency is equal to the Doppler shift,so the velocity of external object is gained easily.The simulation experiments show that the proposed method is very easy,effective,and accurate.

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Reference (15)

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Study of self-mixing interference signal processing based on time-frequency analysis

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