.A detection method of laser doppler signal based on topological contravariance[J].Optoelectronics Letters,2009,5(4):295-298 |
A detection method of laser doppler signal based on topological contravariance |
张玉存 刘海滨 |
Institute;Electrical;Engineering;Yanshan;University; |
Abstract: |
To detect the laser doppler signal, the unknown signal is tracked by the known signal using the concept of topological contravariance.
The unknown topological space U and known space M are founded, and then the unknown signal’s transformation is tracked dynamically according to this mapping relationship between
the two spaces. The system equation is obtained by gradient-descent method, and the conditions of stability are given by Poincaré
mapping. The proposed method is applied to measure the in-plane displacement signal of the solid 50 m away using laser doppler,
signal. The result proves that the method can detect laser doppler. signal accurately, its relative error is less than 0.7%.
This work has been supported by the National Natural Science Foundation of China (No. 60704037). |
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