摘要
研究了以单回路智能调节仪与上位机构建分布式液位监控系统。制定了数据传输过程中所遵循的协议,并以VB 6.0实现了上位机监控系统与现场系统之间的通讯和动态曲线显示,通过单回路智能调节仪可实现实时液位监控和灵活的控制参数设置。讨论了监控系统中基于VB串行通讯的关键技术和有关错误预防办法。试验结果证明,该设计系统能实现现场系统连续的信号采集和趋势图绘制、分析处理等功能,且使用方便、安全可靠。
A distributed liquid level control system is studied based on single loop programmable controller and superior computer. The communication protocol of data transferring is designed. The dynamic display figure and the communication between superior computer and location system are realized. In the system, real-time control of liquid level and parameter setting are ilexible. The key technique and prevention method in the serial communication are discussed based on Visual Basic. The experiment result shows that the system can implement so＇me function of data sampling, tendency chart drawing, data analysis and process on some continuous signal, and it is safe and convenient.
出处
《控制工程》
CSCD
2007年第4期404-406,409,共4页
Control Engineering of China
基金
湖南省教育厅自然科学基金资助项目(05C590)
关键词
单回路控制器
液位控制
串行通信
校验码
single loop controller
liquid level control
serial communication
check-up codes
