Abstract: The traditional measuring method for the shape factors of profile fibers could not meet the requirements of current producing of profile fibers. The technology of digital image processing is widely used in analyzing of fiber cross section and in measuring of the section characteristic parameters for its unique advantage. An automatic measuring and analyzing system for characteristic parameters of cross section of Y shape fiber is developed based on VB platform and presented in this paper. The fiber cross section boundary and other parameters, such as area, circumference, circumscribed circle, inscribed circle and etc. can be obtained by using the boundary detection approach, including one point method, manual repairing, three point method and etc. Then the fiber shape factors are automatically calculated. The measuring data of fiber shape factors and corresponding processing parameters, including size moisture, size temperature and preheating temperature of size, can be output in the form of Excel list. The analysis of relevancy between fiber shape factors and spinning processing of fiber is also realized. It shows that the system can provide good measuring precision and high efficiency. And its function of automatic analysis is of benefit to optimization of processing of Y shape fibers.

Key words: fiber section, shape factor, characteristic parameter, profile fiber