New Method to Calculate Spectrum and Variance-Length Curve Of Yarn
This work is supported by Hubei province foundation on teaching and research (No. 20040228), and foundation of major lab concerning new textile material and appliance (No. TKL200416).
In the process of spinning, the state of machine or inconsequence of corresponding technical parameter will bring various periodic unevenness based on stochastic unevenness of yarn. Spectrum and variance-length curve of yarn signal is not only a primary method to analyze this periodic unevenness of yarn, but also a primary method to check quality of yarn and to diagnose mechanical failure. This paper provided the method to spectrum and variance-length curve of yarn based on wavelet analysis, and established the relation of them. High precision and high calculation speed is demonstrated by this method through experimental comparison and analysis.
