Research On Self-Mixing Interference Displacement Reconstruction Method Based On Ensemble Empirical Mode Decomposition

In this paper, the theoretical model of laser self-mixing interference (SMI) is comprehensively analyzed, and the measurement system of laser self-mixing interference is established. For laser interference from mixed signals that contain noise accurately the displacement of refactoring, laser from the mixed interference measurement system is presented in this paper, on the basis of collecting interference signal, denoising using integrated Ensemble empirical mode decomposition (EEMD) algorithm, according to the principle of phase unwrapping, puts forward a method of reconstruction of displacement for weak feedback, moderate feedback, strong feedback displacement under different optical feedback level has good reconstruction results. The simulation results are consistent with the theoretical analysis, which proves the effectiveness of this method.