Research On Application Of Wireless Transmission Technology In Large Plastic Machinery

With the fast development of China’s economy and improvement of people’s living standards, plastic products not only have been applied in the industrial and algricultural areas but also have become essential supplies of daily life. Meanwhile, higher processing requirements of plastic products have been proposed, such as environmental protection, clean, health, more delicate process, and so on. In the ‘twelfth five-year’ plastic machinery product structure adjustment phase, the “green technology” is proposed to achieve energy conservation, in order to improve the efficiency of plastic machinery. All these require the use of more advanced control technology for plastic machineries.Aimed at the topic about temperature monitoring system of plastic injection molding machine, this thesis has designed a wireless temperature monitoring system based on ZigBee which has strong anti-interference ability, low power consumption, a flexible network characteristics. Comparing to traditional temperature monitoring system, the system solved the poor extension and complicated overhaul and created green working environment for plastic machinery operators. In the system, the STM32F103 ZE, CC2530 chip and ESP8266EX(wifi module) were used to construct coordinator and terminal sensor nodes of star network based on the Z-stack protocol. As the controller of terminal sensor node, CC2530 sent real-time temperature data from K-Thermocouple into the ZigBee coordinator, received temperature commands form ZigBee coordinator, real-time temperature control has implement by solid state relays adjust power. Complete simulation of fuzzy proportional-integral-derivative control algorithm, and output pulse width modulation signals to alternating current chopper circuit. The date transceiver between coordinator and STM32F103 ZE was realized by serial port communication, and the real-time monitoring of temperature was accomplished with monitoring interface established by micrsoft visual studio2012 on PC(personal computer) terminal. Implement mobile terminal remote moniting by wirele-ss gate way which build wireless gate way by ZigBee Coordinator and ESP8266 EX, The experimental results show that the wireless monitoring and control precision can meet the desired requirements. Furthermore, the designed system is character rized by reliable wireless data transmission, simple networking, strong expansibility, low cost, etc.