具有远程监控功能的真空退火炉控制系统的研究与开发

发布时间：2019-07-07 19:54

【摘要】：网络技术的进步使得远距离通讯获得迅猛发展,真空退火加热技术作为传统工业重要组成部分,它与新技术的结合是未来工业发展的方向之一。真空退火处理在工业中占有特殊地位,它是实现加工精良器件必不可少的技术。远程监控一直是困扰工业自动化的难题,涉及技术多,如何保证在安全、实时、准确的前提下实现对远程设备的监测、控制、诊断是未来研究的方向之一。针对真空退火炉在真空设备自动化中的广泛应用,本地系统分别从硬件和软件两个方面设计了一种基于OMROM CJ2M-CPU31 PLC、先进温控仪与工业以太网的退火炉控制系统。阐述硬件系统基本组成和具体设计实现,对下位机PLC进行软件程序设计,在VS 2010、My SQL5.7、Crystal Reports 2008平台上采用C#语言自主开发本地上位监控软件,实现现场工况的监控、数据存储、报表打印和曲线显示等功能。智能温控仪表所带的自整定PID模块对不同温区进行控制,采用SYSMAC Compolet+Fins Gateway与CJ2M-CPU31进行以太网通讯,与其他仪表采用MODBUS协议通讯,使得控制系统在温控精度方面的性能得到很大提高。为解决工业数据信息在远程传输时面临的各种难题,本系统通过采用VPN技术构建虚拟双向通道实现远程监控功能。从成本和安全性角度考虑采用Open VPN实现远程监控,Open VPN作为SSL VPN的一种具体实现,性能优秀,同时对SSL VPN的不足做出较大改进。本地控制系统的客户端与远程监控中心的服务器端设计也是在.NET 4.0框架上采用C#语言实现,采用Socket套接字技术实现两地数据实时双向传输,开辟多线程减少数据传输延时,同时服务器将采集的数据存入数据库方便以后查找和诊断。本文最后从本地和远程两个方面介绍控制系统的调试,由调试数据得出本套具有远程监控功能的真空退火炉控制系统具有控制精度高、可靠性好、安全性强等优点。
文内图片：

图片说明：PLC硬件模块组态图
[Abstract]:With the progress of network technology, long-distance communication has been developed rapidly. Vacuum annealing heating technology, as an important part of traditional industry, its combination with new technology is one of the directions of industrial development in the future. Vacuum annealing plays a special role in industry, and it is an indispensable technology to realize well-machined devices. Remote monitoring has always been a difficult problem in industrial automation, involving many technologies. How to ensure the monitoring, control and diagnosis of remote equipment under the premise of safety, real-time and accuracy is one of the research directions in the future. Aiming at the wide application of vacuum annealing furnace in vacuum equipment automation, the local system designs an annealing furnace control system based on OMROM CJ2M-CPU31 PLC, advanced temperature controller and industrial Ethernet from two aspects of hardware and software. This paper expounds the basic composition and concrete design and implementation of the hardware system, designs the software program of the lower computer PLC, and develops the local upper monitoring software with C # language on the platform of VS 2010, my SQL5.7,Crystal Reports 2008, so as to realize the functions of field working condition monitoring, data storage, report printing and curve display. The self-tuning PID module of intelligent temperature control instrument controls different temperature regions. SYSMAC Compolet Fins Gateway and CJ2M-CPU31 are used for Ethernet communication and MODBUS protocol is used to communicate with other instruments, which greatly improves the performance of the control system in the aspect of temperature control accuracy. In order to solve all kinds of problems faced by industrial data information in remote transmission, the system realizes remote monitoring function by using VPN technology to construct virtual bidirectional channel. From the point of view of cost and security, it is considered that Open VPN is used to realize remote monitoring, Open VPN as a concrete implementation of SSL VPN, and the performance is excellent. At the same time, the shortcomings of SSL VPN are greatly improved. The client side of the local control system and the server side of the remote monitoring center are also realized by C # language on the. Net 4.0 framework. Socket socket technology is used to realize the real-time two-way transmission of the data between the two places, which opens up multithreading to reduce the delay of data transmission. At the same time, the server stores the collected data into the database to find and diagnose. At the end of this paper, the debugging of the control system is introduced from the local and remote aspects. From the debugging data, it is concluded that the vacuum annealing furnace control system with remote monitoring function has the advantages of high control accuracy, good reliability and strong security.
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP273;TB75

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