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当前位置: 首页 > 文章 > 基于AT89S52和DS18B20的多点温度检测报警系统 农机化研究 2007 (5) 121-123
Position: Home > Articles > Multiple Points Temperature Measuring & Alarm System Based on AT89S52 SCM and DS18B20 Journal of Agricultural Mechanization Research 2007 (5) 121-123

基于AT89S52和DS18B20的多点温度检测报警系统

作  者：
丁幼春;熊利荣;黄剑
单  位：
华中农业大学工程技术学院
关键词：
自动控制技术;多点温度测量;设计;DS18B20;AT89S52;单总线
摘  要：
为了对温室大棚室温实施监测、避免局部温度过高,利用多片DS18B20单总线型数字温度传感器,采用外部供电方式,结合AT89S52单片机,外加串口电路、报警电路以及显示模块,设计了多点温度测量并报警的硬件系统。依据DS18B20型温度传感器操作指令,首先读取各传感器的序列号,并确定传感器对应的各点位置关系,定时循环读出各个传感器的温度值并循环显示,单片机依据设定的报警温度上下限做出报警处理;同时,也可利用串口把各点的温度值传给上位机作进一步的处理。实例表明,该系统工作稳定,操作方便,成本低廉,实现了温室大棚中的多点温度检测以及越限报警功能,测温误差在±0.5oC以内。
译  名：
Multiple Points Temperature Measuring & Alarm System Based on AT89S52 SCM and DS18B20
作  者：
DING You-chun, XIONG Li-rong, HUANG Jian (School of Engineering & Technology, Huazhong Agricultural University, Wuhan 430070, China)
关键词：
auto-control technology; multiple points temperature measuring; design; DS18B20; AT89S52; 1-wire bus
摘  要：
In order to get the greenhouse different position's temperature, a multiple points temperature measuring & alarm hardware system had been designed which was composed of one AT89S52 SCM ,serial interface circuit, alarming circuit, display module and several DS18B20s,using the external power supply mode. In the software aspect, according to the DS18B20's operation command, the sensor's serial number had been read out which indicated the different position's temperature values, and then the different points temperature had been read out and displayed circularly from the DS18B20's register in time. The system would give the alarm signal by the temperature value; meanwhile it could transfer the date to the upper computer. Example indicated that the system with low cost, worked steady and could be operated easily, realized the multiple points temperature measuring and alarming. The error of measuring temperature was in the section of -0.5, 0.5 ℃.

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