The Development Of Key Technology Of Intelligent Jigger

With the development of textile industry, increasing improvement on color diversity and dyeing quality of textile has been a significant concern and the textile market requires small-batch, multi-term and high-quality products as well as fast delivery in dyeing industry, which calls for continuous perfection of technical performance of dyeing equipments. So it is imperative to develop intelligent jigger which is one of important dyeing equipments.The intelligent jigger requires its control system to realize the movement specialities of constant speed and constant tension in the movement progress of the fabric, with an intelligent temperature control unit, which is significant to enhance the automatization, intellectualization and informationization of the jigger.To begin with, we briefly introduced the research background of the project, current research situation and development prospect of the dyeing equipments as well as factors effecting dyeing quality, in addition to the detailed analysis on mechanical structure, working principles of jigger and composition of control system, which rendered definite control objectives of the jigger control system.Secondly, general control solution of intelligent jigger was proposed, including velocity-tension transmission control subsystem and intelligent temperature control subsystem, combined with intelligent jigger hardware platform based on PLC, consisting of power management, transmission control, human-machine interface and intelligent temperature control module.Then, we made the research on control strategy of intelligent jigger system. Constrained in the existed jigger mechanical structure, velocity-tension transmission control framework based on dual-frequency converting technology was proposed followed by PLC software, in accordance with control objectives of the intelligent jigger. According to the characteristics of pure time delay, large inertia, time-variance and nonlinearity of the temperature system, we proposed a kind of subsection control strategy that synthesized pure proportional, fuzzy and PID control, to guarantee quick and high-precision temperature control.Furthermore, the development of human-machine interface based on touch screen is introduced detailedly in this thesis. Certain figures of main control, system parameter, manual control and process selection were designed, combined with privilege management and simulation results of the interface were showed.Finally, system debugging method, including PLC and touch-screen debugging, was introduced.In a word, the control system in this thesis has been logically integrated with technologies of PLC, touch screen, inverter and sensor, which was confirmed by field debugging with good stability, fast response and interrupt-robustness.