基于串口通信多点温度测试系统课程设计说明书.docVIP

基于串口通信的多点温度测试系统AT89C51单片机和多片DS18B20单总线型数字温度传感器的多点温度检测系统，主要由AT89C51单片机，温度传感器模块，外加串口电路，报警电路，键盘模块以及显示模块组成。由芯片DS18B20采集温度信号传输给微控制器，通过外围设备显示现场温度值，并设计上位机程序通过串口通信实时获取温度。系统设计包括硬件电路设计、软件设计。单片机程序采用C51，在KEIL开发环境中调试通过完成；PC后台软件采用VB6.0完成。本次设计的基于串口通信的多点温度测试系统的精度0.5℃；测量范围指标是 -55℃～+125℃；最后经过proteus与keil的联调可以基本实现预期目标。 关键词：远程监测 多点温度 DS18B20 AT89C51 串口 Abstract: In order to realize the real-time remote monitoring of the ambient temperature of the application, avoid the environmental temperature is too high or too low, in order to ensure the normal work of the proposed a design scheme based on serial communication of the multipoint temperature test system. Based on serial communication of multi-point temperature measurement system is designed based on AT89C51 single chip and multi chip DS18B20 single bus digital temperature sensor of multi point temperature detection system, mainly by the AT89C51 single-chip microcomputer, temperature sensor module, plus serial circuit, alarm circuit, keyboard module and display module. The temperature signal is transmitted to the microcontroller through the chip DS18B20, and the temperature value is displayed on the peripheral device, and the host computer program is designed to obtain the temperature through the serial communication. System design includes hardware circuit design, software design. MCU program using C51, in the KEIL development environment, through the completion of the debugging; PC background software using VB6.0 complete. The design of the precision index of serial communication of multi-point temperature measurement system based on nonlinear error is + 0.5 DEG C; measuring range index is 55 to + 125C DEG C; Finally through the Proteus and keil of the link can basically achieve the desired goal. Keywords: remote monitoring temperature,AT89C51,DS18B20,serial communication 目录 1 前言 1 2 整体方案设计 3 2.1 方案论证 3 2.2 方案比较 4 3 单元模块设计 5 3.1 AT89C51单片机电路设计 5 3.2 温度传感器接口设计模块 6 3.3 LED温度显示模块 7 3.4 键盘模块 7 3.5 报警模块 8 3.6 电平转换模块 8 4 软件设计 1