Abstract:

An internet-based CAD system for warp knitted fabrics was developed to break the limits of standalone-version warp knitting CAD software and to realize functions of rapid design, simulation, virtual display techniques calculation and real-time data interaction. According to the knitting principle of warp-knitted structures and the basic chain notation, a mathematic model with three-dunebsuibak natruxes for representing the lapping and threading diagram was established. The computer graphics technology was applied to realize the pattern extraction and circulation processing of the simulation diagram, and the database technology was applied to realize the estimation of the amount of let off, etc, which was then converted into the computer language in Visual Studio development environment. A B / S structure was used to complete the interactive design according to the Internet technology principles. The storage and calling of large data were efficiently solved by using the cloud service platform. This developed Internet-based CAD system using the post-release system was finally proved with practicality and stability by designing a simple warp knitted grid fabric.

Key words: war knitting, Internet, computer aided design, mat yarn drawing