Wire and cable is an important industry in national economic construction. In railway communication, leather and foam communication cable has been favored by people because of its small diameter, low cost and light weight under the same performance as other cables. The temperature control in the single-line extruder directly affects the performance quality of the cable. The reliability of temperature control and the level of control accuracy have become the key to determine product quality, and temperature control has also become an important part of the production process. In process control, the overshoot, fluctuation, response time and deviation should be minimized as much as possible, which is very important for product quality, output and raw material saving. This paper mainly controls the temperature parameter of the extruder. The full text mainly includes the following parts: First, the advantages and disadvantages of traditional PID and fuzzy control are analyzed. On this basis, the system selects the fuzzy adaptive PID control algorithm. In terms of hardware, based on the analysis of the system control object, LPC2131 is used as the control core, MAX6675 is used to collect temperature, LCD and keyboard are used as human-machine exchange platforms, and solid relays are controlled in PWM mode. In terms of software, the software was designed and debugged using C language under ARM\'s integrated development environment AD1.2, realizing the hardware configuration and all functions of the overall control system. At the same time, the lower computer part program that communicates with the PC using the Modbus protocol was also realized, and its functionality was tested using the serial port debugging assistant V2.2. In addition, the paper gives a detailed software flow of each functional program module of the control platform. Through the simulation experiment of the system in the laboratory, the control platform runs stably and reliably, and realizes the expected functions, proving that the introduction of fuzzy PID algorithm into the extruder temperature control system improves the control effect of the system and has better robustness and adaptability.
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