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将集中式智能控制系统常用的二层结构改进为智能化的三层结构的设计方案,即传感器、智能巡检仪和上位机;上位机既可以直接读取传感器的数据也可读取智能巡检仪的数据,通过一定的通讯方式与PLC执行计算机连接,读取数据,分析计算,并像执行的计算机发出指令的设备;此方案较好地解决了二层结构所出现的问题,并且也适合较大规模的其它类型的控制系统;这种设计方案存在当规模大时上位机采集数据出现丢失的现象;文章提出了利用数据库的历史数据及控制曲线的线性特征数据采集算法,较好地解决了数据丢失的问题;并以温控系统为例仿真了在较大规模控制环境下的试验结果,已经研制出相应的产品并应用于实际的工业生产和教学实验中。
The centralized intelligent control system commonly used two-tier structure improved intelligent three-tier structure of the design program, that is, sensors, intelligent inspection device and the host computer; PC can read the sensor data can also be read Intelligent Patrol Check the instrument data, through a certain means of communication with the implementation of the computer connected to the PLC, read data, analysis and calculation, and instructions issued by the implementation of the computer equipment; This program to better solve the two-tier structure of the problems, and Suitable for larger scale other types of control system; this design exists when the large-scale acquisition of host computer data loss phenomenon; the article proposed the use of database historical data and control curve linear feature data acquisition algorithm, better Solves the problem of data loss; and uses the temperature control system as an example to simulate the test results in a larger scale control environment. Corresponding products have been developed and applied to actual industrial production and teaching experiments.