Monitoring System for Recovering Waste Printed Circuit Boards
首发时间:2013-01-15
Abstract:(Although the corona electrostatic separation is successfully used in recycling waste printed circuit boards in industrial applications in China, there are problems which can't be resolved completely, such as nonmetal particle aggregation and high-voltage breakdown. Both of these impact the process of separation and are not easy to identify during industrial application. This paper provides a systematic study on a real-time monitoring system. A real-time weight monitoring system was established to continuously monitor the separation process. The monitoring system comprised of two parts: hardware and software. A Virtual Instrument (VI) program written by LabVIEW was used to sample and analyze the incremental accumulation of middling. It included:1) A Real-time monitoring system for the output of corona electrostatic separation (CES); 2) Real-time display of the weight accumulation of middling, the automatic determination to ensure middling stay within the limits ; 3) History date saving to file, which can be used by other software; 4) Statistic analysis and control for the incremental accumulation of middling. Three kinds of work conditions were used to verify the monitoring system. It was found that the system achieved continuous monitoring during the separation process and analyzed the received data. The system also gave comprehensible feedback for the accidents (material blockage in the feed inlet and high-voltage breakdown). The alarm signals not only helped operators to solve the problems in time, but provided input signals for improving the intelligence of the automatic line. From the alarm system, the monitoring system also saved human cost and helped the new technology to replace primordial methods as quickly as possible.
keywords: Real-time Monitoring Waste PCB X-mR control chart.
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破碎电路板高压静电分离的在线监测研究
摘要:高压静电分选技术已经成功应用于破碎废旧印刷电路板的资源化回收,但在工业应用中仍然存在函待解决的问题。如非金属颗粒聚团以及高压击穿现象不仅会破坏分选的进程,而且无法在生产过程中监测预防。本文提出一种实时监控系统,该系统由硬件与软件两部分组成。软件部分应用Labview编写程序实时监测高压静电分选废旧印刷电路板的中间体物料量。程序功能包括:1)高压静电分选机物料产量的实时监测;2)中间体物料增量的实时监测;3)历史数据存档;4)中间体物料增量的统计学分析。利用三种不同的工况条件验证了该实时系统的运行。该实时监测系统可实现分选过程的连续监测任务并采集运行参数数据。同时对分选过程中的非正常现象(入料不均匀或高压击穿现象)给出综合性反馈。该系统的报警系统为操作人员提供及时的反馈信息并加强整条生产工艺的智能化,同时节省了人员成本。
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