Research on Noise Removal in Fiber Grating Sensing Signal

Signal processing is one of the key technology of fiber grating sensor, noise interference on signal transmission, influence of fiber grating sensor practical application effect, in order to solve the noise problem of fiber grating sensing signal, design a denoising method of fiber grating sensing signal based on improved contourlet transform. The acquisition of fiber grating sensing signal firstly, and remove the unwanted signal, select the useful signal, then using contourlet transform, by filtering the noise filter, finally through the concrete experiment to test the effect of denoising. The results show that the improved contourlet transform can completely remove the fiber Bragg grating sensing signals, and improve the quality of FBG sensor communication, and verify the effectiveness of the proposed method.