基于ispPAC20的温度测控系统的设计

The Design of a Temperature Monitoring System Based on ispPAC20

系统可编程模拟器件 isp PAC2 0实现分布式测控系统 ,主要由 isp PAC2 0和 AT89C51单片机构成 ,能够完成对被测对象温度的控制 ,并通过 RS-485接口与计算机进行通讯 ,将控制温度传输到上位机。它具有控制温度的设置和显示 ,实时温度的控制 ,控温信号的输出等功能。与传统的温度控制系统相比 ,它的控制精度较高 ,温度控制范围可调整 。

A new method for implementing a distributed monitoring system based on the 'In System Programmable' analog circuit ispPAC20 is brought forward in this paper.ispPAC20 is employed to control the temperature of the object to be measured.The system is designed to set and indicate the monitoring tempaerature,monitor the real time temperature,and give the control signals.Compared with its predecesso rs,this new system bear better properties,such as higher monitor precision,variable ranges of the monitoring temperature;fine re programmability,and simple hardware construction.