The invention provides an FBG sensor demodulation peak-searching method based on wavelet singularity detection. The method comprises the steps of a) acquiring fiber bragg grating reflection spectrum data; b) dividing the acquired fiber bragg grating reflection spectrum into a plurality of segments by setting a light intensity threshold; c) carrying out cubic spline interpolation of each segment of the fiber bragg grating reflection spectrum; d) carrying out multi-scale wavelet transform using Mexican hat wavelets; e) sequentially obtaining a modulus maximum value of wavelet transform on each scale, and obtaining the channel of each wavelet transform peak; f) determining whether the channel of the wavelet transform peak of each scale is the peak point position, if not, returning back to the step e), and if so, entering a step g); and g) according to a corresponding relational expression of pixel points of the fiber bragg grating reflection spectrum and the wavelength, calculating a center wavelength value at the corresponding pixel point position to the peak point position.
FBG sensor demodulation peak-searching method based on wavelet singularity detection