The software of the chief station is composed of monitoring module and communicating module . the monitoring module involves the use of pc - labcards , the method of a precise timer , the principle of pid autocontrol and how to use it in the project , the realization of all kinds of reports with the ole automation skill , while the communicating module discusses the way of communication between the chief station and the scheduler based on the c / s structure . both monitoring module and communicating module are established on the database , so this paper particularly describes the access methods to ms sql server and the advantage of database stored procedure 论文先概要介绍了热网微机监控系统的需求分析和总体设计，然后在此基础上详细地阐述了首站软件实时监控模块和通信模块的实现细节，描述了工业采集卡的用法；提出了一种基于内核timer对象的精确定时方法；介绍了pid自动控制原理及其改进算法和现场控制参数的整定方法；用ole自动化技术扩充了visualbasic6 . 0的报表功能；在c / s用模型的基础上实现了首站和调度站的异步通信；讨论了visualbasic6 . 0对mssqlserver的数据存取方法和数据源驱动原理，在此基础上充分利用数据库存储过程完成了系统部分功能。
In this research , we have defined a best data model , a dispose pattern and the best method for memory and draw data , and we also established a database system that it can reflect relations between the information in the realistic world and can meet the user ' s acquirement , and it can also be accepted by the dbms and carry out it ' s system ' s goal 在开发中，我们对一个给定的应用环境，确定了最优的数据模型与处理模式以及数据库存贮结构与存取方法，并且建立了一个既能反映现实世界信息和信息之间联系，满足用户的需求，又能被dbms所接受并能实现系统目标的数据库系统。
