Design Of Control System For Full-Automatic Fungi Bags Production Line

The yield of Chinese edible fungi has accounted for 70% of the world. Every year, 370 million tons of crop straw wastes and hundred millions of forest by-product provide sufficient raw materials for developing the edible fungi industry. With the rapid increase of labor costs, production equipment of traditional and scattered edible fungi bags can't satisfy people's demands for rapid increase of edible fungi. As the growth carrier of edible fungi, production of edible fungi bags should experience six processes, including insert pocket, cap bag, materials, opening, insert sticks and framing, etc. For the production of traditional edible fungi bags, process equipment is relatively independent. Moreover, most of them adopt manual operation. Irregular technological level of workers not only results in hard ensuring fungi bag quality and lower efficiency. Therefore, it is extremely important to design a full-automatic production line by aiming at production industry of edible fungi bagsThe production line control system of the entire fungi bag can be divided into six parts, including insert pocket, cap bag, materials, opening, insert sticks and framing, etc. In the production process, the circulation and connection between process and process is an important factor of impacting good rate of fungi bags. The switch of different process is easy to lower the good rate. In order to live up to better control and integrate circulation and connection between different processes, the production line control system adopts the modular programming idea to compile different processes into modular forms successfully. In process linkage, it can call functional blocks directly. In this way, it avoids from the interference between processes, but also optimizes structure of procedures. In addition, in order to ensure consistency of every fungi bag, beginning with variables of impacting material technology of fungi bags, the accurate control on material cylinder speed and position can ensure high quality of fungi bags. By analyzing material cylinder and electromagnetic servo valve mechanism, the paper establishes the mathematical model of material cylinder speed serve control system, draws a relation between control flow and cylinder speed, induces its transfer function, utilizes Matlab software Simulink module to conduct time-domain and frequency-domain stable analysis of transfer function for material cylinder speed serve control system,preliminarily verifies stability of verification system, and ultimately formulates areasonable control strategy. The production line control system includes upper computer and lower computer. The upper computer adopts Corum state touch screen as the center of man-machine interaction and realizes parameter input, real-time display, fault alarming remind in operation process, manual, semi-automatic and automatic operation, etc., functions. Lower computer uses Omron CP1-H series PLC as the core of the entire control system to control coordination movement and information exchange between control processes.Ultimately, fungi bag machine is used for material and operation experience. By calculating unit time, yield of fungi bags is received the production efficiency of fungi bag machine. By measuring diameter, height and quality of randomized fungi bags, the precision of mathematical model for material cylinder speed servo control system and reliability of the control strategy can be verified.