【作者】 区志励；

【导师】 张光新；

【作者基本信息】 浙江大学 ， 检测技术与自动化装置， 2006， 硕士

【摘要】 随着自动化技术的发展和深入应用,企业对综合信息管理系统的需求越来越广泛。浙江石梁啤酒有限公司35万吨/年纯生啤酒发酵生产过程综合自动化系统针对高档纯生啤酒的自动化发酵生产过程研制开发,系统满足了大中型啤酒厂高质量啤酒发酵生产的全自动化控制、网络化管理的需求,采用自行开发的专用软件,可以适应啤酒发酵生产中的各种特殊要求。 本文以该系统作为工程背景,对生产过程中的综合自动化技术、以及与信息管理系统的集成进行了详细的分析、研究和开发。 该系统采用多操作站和多控制站的PLC_Based DCS系统架构,底层以西门子S7-300/400系列PLC(10套)为控制核心,OS为IPC(4套),二者实现35万吨/年纯生啤酒发酵生产过程的全自动控制。论文首先针对OS/CS间MPI网络传输速率低的特点,设计了三层Control Station/Server/Client(控制站/服务器/客户端)网络结构,利用单一功能的服务器作为上下位机之间的通信枢纽,充分利用了以太网的高带宽,尽最大可能减轻了MPI网络的通信负荷,实现了上下位机之间高效、可靠的实时数据通信。通过该网络设计,该系统实现了对操作站IPC、控制站PLC,尤其是第三方控制系统单机的柔性无缝集成,极大地提高了可实时性和可扩展性。 啤酒发酵过程自动化系统规模庞大,本文还从提高系统的可维护性和升级部署速度出发,对该系统的监控软件进行了相关研究。基于Web的B/S(浏览器/服务器)结构近年来受到广泛的关注,它已逐渐成为监控软件发展的一个新趋势,与传统的C/S结构相比,B/S结构具有客户端“零部署”的优点,以及更广泛的平台适应性。然而,B/S结构采用的是“请求—响应”的交互模式,数据通信的实时性不高,成为B/S结构应用于工业监控软件的瓶颈。2005年出现的AJAX(Asynchronous Javascript XML,异步Javascript和XML)技术,通过异步模式实现了浏览器、服务器之间的实时数据交互。本文针对发酵过程自动化系统,对基于AJAX的B/S结构的监控软件进行了前期的设计、开发和应用实现。B/S结构的应用,能够大幅度减少操作站的升级、维护工作量,使其具有更高的可扩展性,并且将系统的集成范围扩展到在广域网范围上。更多还原

【Abstract】 With the development and application of automatic technology, the demand for integrated automatic systems had been increasing rapidly. Aimed at yeilding high quality beer products, an automatic control system for beer fermentation was developped in Shiliang Group Co.Ltd, which production is up to 350,000 ton per year. In order to satisfy full-automatic control and supervision for the entire manufacture process of the beer fermentation, a kind of special system framework was introduced.Based on the upper fermentation system, the technique for the integration of sub-control system and information management were analysised and lucubrated, a set of integrated full-automatic systems and corresponding software were developed and applied successfully.The system was composed of control stations and operation stations which based on PLC. The core of the structure was 10 S7-300/400 PLCs and 4 IPCs. Aimed at the low rate of MPI network between OS/CS, a kind of Control Station/Server/Client architecture was designed and applied successfully. In order to achieve high-rate realtime data interactivity between operation station and control station, in this architecture, a fixed-function server as the hinge between OS/CS was introduced. In this way, the fast Erthernet could be used suficiently and the load of MPI network could be reduced largely. Furthermore, for the flexible seamless integration of IPC, PLC, and especially single equipment system, the real-time capability and expandability were improved greatly.Since the beer fermentation control system is always very large, in this thesis, the conveinience to deploy and update of the supervisory software was also considered and represented in details. B/S (Browser/Server) archietacture based on web is a new trend of the supervisory software development. Compared with the traditional C/S (Client/Server) archietacture, B/S archietacture achieved "Zero Deployment" in the client, and it could work across platforms. But with the traditional web application model the response was not rapid enough, then AJAX (Asynchronous Javascript XML) technology was introduced. With an asynchronous application model, AJAX could achieve realtime data interactivity between C/S. In this thesis, an supervisory software for the beer automation system based on AJAX and B/S archietacture was designed, developped and applied successfully.更多还原