锌电解整流及监控系统的研究

【作者】 荣飞；

【导师】 罗安；

【作者基本信息】 中南大学 ， 控制理论与控制工程， 2003， 硕士

【摘要】 目前电解行业中用于整流的设备，普遍采用的是小规模集成控制电路，其可靠性很难得到保证，并且没有监视环节，不能够实时掌握系统的运行状况。为了有效解决这些问题，提高企业的生产效率，促进企业的现代化步伐，保证企业的市场竞争能力，必须采用新的控制策略来重新实现整流监控系统。近年来随着微电子技术的突破，微处理器性能的提高，价格的下降，中断响应和处理速度的提高，使得在微处理器或微计算机系统基础上实现生产过程的计算机控制和管理成为现实。为此，本文提出了一种直接用工控机来完成对晶闸管进行控制的数字监控系统，首次把控制和监视环节融为一体，为生产带来了很大的方便。 本系统在实现整流的基础上，设计了电流闭环回路，采用神经网络PID调节器在线实时控制电解电流，同时设计了监视环节对整个系统的工作状况进行监视。本系统着重解决了工控机用于实时控制精度不高的问题，提出了在软件设计上采取一系列方法加以弥补：设计多线程技术让CPU并行处理用户交互，晶闸管触发，PID参数的自整定三个任务；采用快速交流采样法完成采样过程以节省采样时间；直接对硬件编程实现高精度定时等。实际运行情况表明，该系统同时兼有单片机的实时性和工控机的方便性，在满足了生产需要的同时减少了硬件设备。更多还原

【Abstract】 Now the equipment of rectification that used in electrolysis profession, generally adopt small-scale integrated control circuit. Its reliability can not be guaranteed, and because it don’t have monitor, so can’t grasp systematic operation condition in real time. To solve these problems efficiently, raise the production efficiency of enterprise, promote the developmental step of enterprise,guarantee the competitive ability of enterprise, we must come to carry out new control system. In recent years, with the breakthrough of microelectronics technology, the raising of tiny processor property, the dropping of price, the raising of handling speed responded for interrupt, make the computer control of production course on tiny processor or tiny computer systematic foundation become reality. This paper introduced a kind of figure supervisory system that directly use computer to control the thyristors. For the first time, we combine the control and the monitor, and brought great convenience to produce.On the foundation that realizes rectification , this system designed the closed current loop , and adopt NN PID regulator to control current on real time.Additional,the system can keep watch on the working condition.The system solved the problem emphatically that the computer control precision used in real time is not high. And bring forward a series of software method to remedy: Design multithread to let CPU parallel handle three task of user interface, thyristor trigger and adjust PID parameter; select fast sampling method to complete sample; directly program for hardware to realize high accuracy timer and so on. Actual operation condition shows , this system both has the advantage of single flat machine and the convenientance of computer, while having satisfied the needs of the production,reduced the hardware equipments.更多还原