Research And Implementation Of 32-bit MCU Based Intelligent Control System For Three-layer Coextrusion Cross-linked Cable Production Line

Electric power has brought great convenience to the progress of China’s industry and the lives of citizens.The role of electrical cables for transmission of electricity has become increasingly important.How to efficiently produce high-quality cables is even more critical.The production of the vast majority of insulated power cables in today’s society relies on three-layer co-extrusion cross-linked production lines.The production method of this cable production line has the advantages of high efficiency,high quality,and easy maintenance of equipment and is widely used.With the continuous development of industrial automation,the automatic control system of the three-layer co-extruded cross-linked cable production line has also continued to improve.Most of the current mainstream control systems are based on programmable logic controllers(PLC: Programmable Logic Controller).The core control of the entire production line is the temperature and speed control during the production of the cable,which specifically addresses the temperature control of the extruder and pipeline in the production line;the speed control of the production line for the retractable wire rack,upper and lower traction machine,and line accumulator;And realize the design of visual human-computer interaction interface for the entire production line.This project will use a 32-bit MCU(specifically STM32F103ZET6)as the control core instead of the traditional PLC to achieve intelligent control of a three-layer coextrusion cross-linked cable production line.For the control of the extruder and the pipeline,the thermocouple is used to collect the temperature of each segment,and the data is uploaded to the MCU through the compensation wire combined with the analogto-digital conversion(ADC).The MCU uses the PID algorithm in combination with Pulse Width Modulation(PWM: Pulse Width Modulation)Multi-channel temperature control;For the control of retractable wire rack,wire storage,up and down traction,the Modbus bus protocol is used for data communication between the MCU and the DC governor.The DC governor implements the control of each part of the motor according to the instructions of the MCU.In order to achieve the speed control of the production line;for the human-computer interaction interface,TFT_LCD is selected to monitor the production line data in real time and control the production process of the production line in real time,and in the event of an abnormality in the production line,it can promptly alert and make early warning processing.The intelligent control system designed in this subject has selected a 32-bit MCU as the control core to save the main control cost to a certain extent;the PID algorithm is selected to implement temperature control to ensure the reliability of the multichannel temperature control system and achieve stable control;Modbus bus protocol is used to ensure The reliability of speed control can be achieved,and ultra-precise data exchange with the DC governor can be realized.Finally,a man-machine interactive operation interface is designed according to the needs of the production line to improve the convenience of system operation.This design can be widely used in intelligent control of three-layer co-extrusion cross-linked cable production line.