Kind of magnetostrictive wave guide calibration signal processing method and apparatus

摘要

PROBLEM TO BE SOLVED: To disclose a kind of magnetostrictive waveguide test signal processing method and apparatus. As a method, a primitive test signal is cut out to obtain an analysis signal u (n), and then band-pass filtration is performed to obtain x (n). Assuming that the operation signal length is L, M = [L / 4] and R = [M / 2]. Initial i = 0, cut data x (i), ..., x (i + M-1), create matrix A of R * (M-R + 1), and perform singular value decomposition on matrix A By acquiring the singular matrix B and the feature value λ, the value below the median value in λ is reset to obtain the matrix C, the matrix C is subjected to inverse singular transformation, and the matrix D is obtained. The processed signal y is reduced from D and its energy z is calculated. When i = i + 1 and the above steps are repeated until the energy calculation after the signal processing of the selected analysis area is completed, it is determined whether or not the signal is defective based on the distortion feature of the energy distribution diagram. By implementing the present invention, it is possible to effectively improve the signal-to-noise ratio and the verification accuracy of the magnetostrictive waveguide verification signal. [Selection] Figure 1