分布式热网参数计量采集系统

介绍了适用于城市集中供热热网参数计量采集管理系统，系统为上、下二级分布式结构。系统下位机包括热网首端计量仪，以及６０个通用供热网点参数计量终端机，下位机系统主要完成整个热参数实时检测及供热量计算。系统上位机为由４８６兼容机，彩色显示器，打印机及缓图仪组成的数据采集管理系统。系统具有全网通讯和数据管理功能，以及计算数据存盘（软盘）等，系统数据通讯采用串行异步通讯，有线传输，最远传输距离可达１５ｋｍ。

DISTRIBUTED PARAMETER MEASUREMENT AND COLLECTION SYSTEM IN HEATING NETWORK

The system presented here is parameter measurement and collection system which is applied for urban heating network.It is composed of tow-stage distributed subsystem:upper subsystem and lower subsystem.Lower subsystem consists of head metering device, terminal computer for collecting parameter in relay pump station, and terminal computer for measurement of parameter in 60 general heating points.The main target of lower subsystem is the inspection of entirely heating parameters and measurement of heating supply in whole system, upper subsystem, which takes charge of date collection and management,comprises of compatible computer 486 colour display, printer,and mapper. The functions of upper subsystem includs all pass communication network . data management. display of data conceming on screen.statist chart print. ploting operating mode of heating network as well as paraments storage (tape) and so on. The system adapts serial asynchronous communication,wire transmission whose maximum distance can reach 15 kilometers.