毕业设计（论文）-基于VB和单片机的多点温度采集系统.doc

基于VB和单片机的多点温度采集系统
【摘要】: 测温系统是以数据采集原理为主要理论依据,将传感器DS18B20所测的温度转换成为电信号,再由AT89C51单片机对其进行量化编码,转化为整型数据和浮点型数据;整型数据为了方便AT89C51单片机与PC之间的通讯,浮点型数据是用来显示在液晶显示器12864上面的。根据串行通讯原理,设计了AT89C51单片机与PC机的接口电路,建立了AT89C51单片机与PC机之间的串行通讯协议,——将采集到的温度信号编码进行接受和描述,将其直接显示在可视的界面当中,对信号进行分析和处理,并将其用曲线实时显示出来。本设计在选择仪器方面的宗旨是使用起来方便快捷,成本低廉,而且大幅度提高了测量精度,最终目的能实现人机的对话且能及时知道系统的运行状况等功能。
【关键词】:AT89C51单片机,编码,温度,实时曲线,DS18B20,
Based on VB and MCU multipoint temperature collection system
Fang Li
(Grade08, Class4, Major Automation, Electrical Engineering Dept., Shaanxi University of Technology , Hanzhong 723003, Shaanxi
)
Tutor:Hu Bo
【Abstract】:Temperature measurement system to data collection principle as the main theoretical basis, the temperature sensor DS18B20 converted into electrical signals, again by AT89C51 single-chip puter the quantitative coding, into the whole model data and floating point type data; Integer data in order to facilitate the AT89C51 single-chip puter and of munication between a PC, the floating-point data is used to display type in LCD monitor above 12864. According to the munication principle, design the AT89C51 single-chip puter and PC interface circuit, established the AT89C51 single-chip puter and PC of munication between agreement, and use of temperature measurement system through realized the objectivity operation-will the collected temperature signal encoding to accept and description, its directly display in visual interface of the signal analysis and processing, and use its curve real-time  of this design choice of instrument is to use a convenient, low cost, and greatly improve the measurement accuracy, the ultimate aim to achieve the system of man-machine dialogue and can know in time to run status.
【Keywords】: VB; database; temperature; monitoring
目录
1引言 1
概述 1
国内、外现状 1
系统设计的任务要求 2
系统方案论证 2
系统设计原理框图及各部分功能简介 3
系统设计进度安排 3
2 系统硬件设计 4
控制器的设计 4
控制器的选择 4
AT89C52主要特性 4