Design And Realization Of Computer Flat Knitting Machine Control System Based On The Architecture Of ARM And FPGA

With rapid development of social and economic forward, the living standard of people is continuously improved, and people’s pursuit of knitwear already from the pure warm to fashion、 comfortable、personalized、diversified. Former knitting industry technical equipment and technical level is very backward, and it is out of date, research and development intelligent、automatic electronic machinery and equipment has become a trend. Computer flat knitting machine is one of the most important machine in knitting industry, with higher technological content、much more difficult in research and higher intelligent degree. In view of China’s industrial control intelligent level is low, labor cost is more and more high, the computer knitting machine control system of market demand is very huge. Therefore, the development of novel control system of computerized flat knitting machine is this topic research content.Firstly, this paper introduces the control system of computerized flat knitting machine of domestic and international research status and development trend of. Then, the computer flat knitting machine mechanical structure and working principle of the key technology are described. After that, analyzed the existing domestic mature control scheme, combining with embedded technology, propose one kind of computerized flat knitting machine control system based on the architecture of ARM and FPGA. At the same time, description of the whole control system of computerized flat knitting machine frame. The system is divided into unit four parts, such as the computer flat knitting machine for a data analysis unit, CPLD field operation unit, machine head oeration unit and the man-machine control operation unit. This paper presents the computer flat knitting machine control system adopts AT91SAM9261S as the main processor. Through the CAN bus communicate technology, high-speed coordinated control with2AC servo motor,10stepping motors and128electromagnets in the computer flat knitting machine. Machine head movement speed can reach to1.2m/s, selecting needle time is less than1ms, maximum needle selection number is1248needles, and use10.4inch touch screen operation control. Part of the text describes in detail of computer flat knitting machine control system hardware design. Including computer flat knitting machine motherboard design, machine head board design, stepper motor driver board design and electromagnet drive board design. And detail analysis and explain some of the circuit principle of. And then presents a framework based on FPGA video frame rate acceleration scheme, achieve10.4inch800*600resolution TFT LCD smoother display, greatly easing the ARM processor display processing tasks. Then elaborated the CPLD logic design, including the motherboard CPLD logic design and machine head CPLD logic design, gives the core design thought and some methods to solve the key technique.This control system of computerized flat knitting machine in the industrial field environment through the year of commissioning test, the system stability and reliability of the continuous improvement, the setting of system operation constantly optimize, operation interface humanization degree continuously improve. In Shaoxing Xinchang, a town after3months of actual operation, the results show that the system is stable and reliable. It has very high price compared with the original DSP structure of computer flat knitting machine control system. If the control system of computerized flat knitting machine for a wide range of promotion, will produce considerable social benefits, for knitting industry of our country to makes contribution.