【作者】 袁雪；

【导师】 陈斌；

【作者基本信息】 江苏大学 ， 测试计量技术及仪器， 2008， 硕士

【摘要】 微生物发酵工程是生化工程和现代生物技术及其产业化的基础。发酵过程测控系统是发酵系统中重要的组成部分,直接影响着发酵过程生产。通过测控系统对发酵过程实施有效的监测与控制,确保发酵过程生产正常运行,提高发酵的产量和质量。随着微生物技术的迅速发展,发酵工业的生产规模不断扩大,迫切要求对发酵过程进行先进的控制和优化。目前,Labview在发酵过程在线监测与自动化控制领域已经有了一些成功的应用,并越来越受到欢迎,但是大多数研究以上下位机的控制方式为主,对发酵过程进行异地网络化监控少有报道,同时,随着Internet技术与Web数据库技术的迅速发展,建立开放式、可扩展的远程监控系统已成为现实,基于网络的数据共享、数据发布以及远程监控是大势所趋。由于Labview能方便地与Internet相连,为数据的自动采集和远程实时监测提供了一种理想的解决方案,本课题就是在这样的背景下提出来的,对上下位机的控制方式进行了改进,研究并实现了基于Internet的生物发酵过程远程监控。整个系统采用模块化、层次化的设计方法,综合利用了传感器技术、可编程逻辑控制技术、数据采集、RS-485总线技术和网络通信技术,具有接口简单、适应性强、升级扩展方便等特点,具有良好的开放性。本文首先阐述了监控系统总体设计思想,详细论述了系统硬件构成和软件设计思想及实现,该系统利用上位机作为服务器,网络上的任意一台PC机作为客户端,采用LabVIEW 7.1作为前台开发工具,以SQL Server 2000作为后台数据库,以PLC作为下位机,采用模块化设计思想,主要分为八个模块:参数设置模块、数据采集模块、网络通信模块、监测报警模块、实时曲线监控模块、数据分析处理模块、结果分析和用户管理模块。实现了对发酵过程多个信号参量采集、处理、分析和显示。此外,还对基于CGI、RDA、ActiveX、TCP/IP、DataSocket远程测控技术进行了研究,通过对这几种技术在实时性、远程控制、开发难度和可靠性方面的性能比较,得出DataSocket技术更符合本远程测控系统设计的要求,研究了基于C/S模式的网络实时监控系统关键技术,并以此实现了远程测控端对多个测试点的实时监控。更多还原

【Abstract】 The micro bio-fermentation engineering is the basis of biochemistry engineering and the modern biological technology industrialization. The fermentation process monitoring system takes an important role in the whole fermentation process, which immediately affects the result of fermentation process production. Through effective monitoring and controlling, fermentation process production can be operated normally and the product quality and output can be promoted.With the rapid development of microbe technique and the increasing enlargement of manufacturing dimensions in the ferment industry, it is urgent to carry through advanced optimization and control for the fermentation process. Presently, LabVIEW as a new development tool has been successfully applied in the monitoring and on-line control of biological ferment field, and becoming more and more popular, however, most of the researches are limited to the mode of host computer controlling slave computer, and remotely monitoring for the ferment process is rarely reported. At the same time, with swift advancement the technology of Internet and web database, it has become true to establish an open and extensible remote monitoring system, and data sharing, data publishing and remote control based on network will be the future development tendency. Since LabVIEW can conveniently connect with Internet, which provide a perfect resolution to the data automatic acquisition and remote control. According to the above-mentioned background, this paper improved the control mode of master computer controlling slave computer, realized remote monitoring for the ferment process based on Internet.The overall system was adapted modular and hierarchical design method, combined with sensor technology, programmable logical control technology, data acquisition, RS-485 Bus technique and the network communication technology, which had lots of advantages and openness such as simple interface, strong compatibility, easy to upgrade and convenient expansion.This paper firstly gives a brief introduction for the overall design idea of ferment process monitoring system, and then detailedly discussed system hardware constitution, software design thought and realization. The host computer was applied as system server, an arbitrary PC as client, LabVIEW as development tool, and PLC as slave computer, using the modulation design concept, which was mainly divided into eight modules: Parameter establishment module, data acquisition module, network service module, monitor warning module, real-time curve monitoring module, data analysis processing module, result analysis and user administration module. Accordingly multiple signal parameter acquisition, processing, analysis and display were realized.In addition, some technology related to the remote control such as CGI, RDA, ActiveX, TCP/IP and DataSocket have been researched in this paper, through comparison with those technologies on the characteristic of real-time, remote control, development difficulties and reliability, the conclusion was drawn that DataSocket is the most suitable method to realize ferment process remote on-line monitoring, multiple points real-time remote control has been realized based on C/S pattern network in this ferment on-line testing monitoring system.更多还原