2.2.1 调压系统简介 ..................................................................................10
2.2.2 监控系统的主要功能 ......................................................................11
第 3 章 天然气调压站监控系统硬件设计 ...................................................................13
3.1 电气控制柜的设计 ........................................................................................13
3.2 模拟量采集电路 ............................................................................................15
3.3 信号转换与隔离 ............................................................................................15
3.4 PLC 控制电路 ................................................................................................16
3.5 显示器电路 ....................................................................................................17
3.6 通信网络的设计 ............................................................................................18
3.6.1 网络拓扑 ..........................................................................................18
3.6.2 传输介质 ..........................................................................................18
3.6.3 通信接口 ..........................................................................................18
第 4 章 天然气调压站监控系统软件设计 ...................................................................20
4.1 系统总体执行逻辑的设计 ............................................................................21
4.2 模拟量数据的处理 ........................................................................................24
4.3 与流量计的通信 ....................................................................................................25
第 5 章 天然气调压站监控系统可靠性设计 ...............................................................28
5.1 环境条件的考虑 ....................................................................................................28
5.2 监控系统的硬件抗干扰设计 ................................................................................28
5.3 软件可靠性设计 ....................................................................................................29
致谢 .................................................................................................................................31
参考文献 .........................................................................................................................32