Online Monitoring and Control of Treatment Equipment for Recycling Crushed Waste Printed Circuit Board
|School||Shanghai Jiaotong University|
|Keywords||Electronic waste Waste printed circuit boards High voltage electrostatic separation Online monitoring LabVIEW PLC control Neural Networks|
With the acceleration of technology replacement and electronics industry market continues to expand, the e-waste was the rapid growth of electronic waste generated each year about 500 million tons. In addition, foreigners, there are a lot of e-waste flows to the country. Circuit board as the basis of the electronic and information industry, used in almost all electrical and electronic products, electronic waste, increase led to a rapid increase in waste printed circuit boards. The precious metal grade scrap board contains the natural resources of dozens or even hundreds of times, with high recycling value. Meanwhile, due to the complexity of the structure and composition of the waste printed circuit boards, contains large amounts of toxic and hazardous substances, if not environmentally friendly manner, would pose a serious threat to the natural environment and human health. Waste printed circuit boards behind the approach has caused serious environmental pollution and waste of resources, the need to establish a set of scientific, efficient and environmentally friendly disposal and recycling technology. High voltage electrostatic separation technology to the crushing of waste printed circuit boards metallic and non-metallic physical separation can be achieved, and with high efficiency, low power consumption, environmentally friendly and other significant advantages, the use of advanced technology and the harmless disposal of waste printed circuit boards and resources a. In this paper, established in the early high-voltage electrostatic separation production line parameter optimization based on a systematic study of the electrostatic separation process monitoring and control methods, problems exist in the process of sorting and solve these problems, the theoretical analysis design solutions innocuous treatment of waste printed circuit boards and industrial application provides a theoretical basis and new methods. By theoretical analysis, independent research and development of a complete set of on-line monitoring system: the hardware side, and compare options, use the appropriate hardware to build the online monitoring systems hardware platform; software program written in the LabVIEW graphical programming environment, needs analysis, complete online monitoring system for the goal of building real-time analysis and calculation of the program signal, and control charts map out in order to ensure the operation of the monitoring field devices can dynamically online; experiments show that, when damaged system stability keenly when this system can find and automatically instant alarm, to avoid the generation of more substandard products; This system can automatically record and save historical data provides a convenient, for the latter part of the research and data mining. High voltage electrostatic separation system for crushing waste printed circuit boards PLC control system design, determine the process of operation of the control system, preparation of control programs using GX Developer software; design simulation experiments and simulation, experimental results show that the developed PLC program logic is correct, can automatically complete the process of the operation of the control system, for broken industrial application of high voltage electrostatic separation system of waste printed circuit boards provide reliable control and operating system. Theoretical analysis of neural network theory for waste printed circuit boards, high-pressure electrostatic separation, as the choice of BP neural network modeling type, use MATLAB to write the core program, the design of man-machine interface using LabVIEW, and MATLAB and LabVIEW software integration, design, and validation experiments. The experiments show that the established neural network model can simulate the actual production process, to provide a basis for the design of intelligent controllers.