1、 毕业论文毕业论文 (2007 届届) 多点温度巡回检测系统多点温度巡回检测系统 学生姓名:学生姓名: _* 学学 号:号: 院院 系:系: 机电工程系机电工程系 专专 业:业: _自动化自动化 指导教师:指导教师: 完成日期:完成日期: I I 多点温度巡回检测系多点温度巡回检测系统统 摘摘 要要 本设计为多点温度巡回检测系统,系统由上位机、下位机、通讯三部分组 成。采用以计算机作为上位机,以单片机为核心的仪器作为下位机,再加上通 讯来完成设计。该系统是利用多台下位机来采集分布在不同位置的温度值,实 现多点的测量,通过网络与计算机通讯,解决了温度测量中分布与多点的问题, 并且由计算机来实现对
2、温度的集中监视与管理。多点温度巡回检测以计算机为 平台设计的温度测量管理软件对整个系统进行统一管理,并对下位机可进行系 统参数的设定;实现对多点温度的采集、数据处理、实时显示、报表,打印等 功能。下位机主要以单片机 AT89C52 为核心,用 Small Rtos51 作为软件开发平 台,实现对多点温度进行巡回检测,包括温度转换、温度设定、显示以及报警 等功能,同时实现与上位机的通信。通讯采用串口的方式,以应用于电子控制 器上的一种通用语言 Modbus 协议来实现,便于联网与网络管理。 关键词关键词 温度检测;高精度;Small RTOS51;串口;Modbus II II The cycl
3、ing multi-point temperature detection system A ABSTRACTBSTRACT The design of the cycling multi-point temperature detection system uses computers and microcontrollers as PCs and lower computers respectively, together with communications between them. This system adopts several lower computers to acqu
4、ire the temperature, distributing in different positions, and solves the problem of distribution and different points in the measurement of temperature through computer communications network, monitoring and management of the temperature can also be reached. The cycling multi-point temperature detec
5、tion system consists of PCs, lower computers and communications, and manages the entire system by software, realizing the functions just as acquisition, data processing, real-time display, report, print of multi-point temperature and so on. The core of lower computers is AT89C52 MCU. The software in
6、 the instrument adopts Small RTOS51. This part implements the cycling detection of multi-point temperature, including the functions of conversion, setting, display, alarm and communications. The communications bases on Modbus protocol, making use of serial port mode, and then puts interconnection and management of network into effect. KEYWORDSKEYWORDS temperature detection; High precisi