Abstract
In the previous paper, the structure of helical coil assemblies was presented as a yarn model, and basing upon this structure, the distribution of the phase angles of fibers was discussed.
In this paper, a method to measure the phase angles is discribed, and it is made clear that the phase difference can be calculated by mutual correlation function R(τ) between two crimp waves. This R(τ) takes the maximum value at the position where two phase angles are coincident. The experimental results agree with the phase distributions which can be estimated from the theoretical analysis.
