基于单片机的温度数据采集器  

Temperature Data Acquisition Instrument Based on the Single Chip Computer

作　　者：吴琳[1] 杨林[1] 赵桂丰[1] 

机构地区：[1]大连工业大学,辽宁大连116034

出　　处：《现代电子技术》2008年第19期110-113,共4页Modern Electronics Technique

摘　　要：介绍了基于单片机的多通道温度数据采集器的设计,采用AT89C52单片机作为CPU,设计了能与多种温度传感器配合使用的信号调理接口电路,并且提出基于软、硬件相互配合解决了热电偶测量过程中冷端温度补偿的方法,通过分析干扰对系统的危害性,设计了"看门狗"电路;设计了RS 485串行通信接口,以便与上位机进行数据通讯。同时设计了一部分和硬件配套的软件,编写了串行通讯程序和A/D转换子程序。The design process of multi- channel data acquisition instrument based on the single chip computer is introduced. Using AT89C52 single chip computer as CPU, the interface circuit of signal mediation to interface with many sensors are designed, and a method based on software and hardware to solve the problems of cold junction compensation of thermocoupie in the course of measurement. According to analyze the fatalness of the anti -jamming to the system, ＂watching dog timer＂ and RS 485 communication interface in order to communicate with PC are designed. At the same time.a part of corresponding software, series communication and A/D convert programmer are designed too.

关 键 词：数据采集 冷端补偿 数据通讯 热电偶测量 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]