文档介绍：关键词:数字温度传感器;单总线;通信协议;DS18B20;AT89C2051;LED显示器;报警信号。
Abstract
   Temperature detection and control of industrial production process, one of the more typical applications, with sensors in production and life is more widely used, using a new single-bus digital temperature sensor to achieve the test and control the temperature more rapidly development, this paper is designed based on AT89C51 temperature detection and alarm systems. The system will be more than a single-bus temperature sensor DS18B20 and connected to a port on the controller, the temperature sensors on each loop collection, the temperature will be collected pare with the set value, when the temperature exceeds the upper limit set , through the ISD1420 voice circuit gives voice prompts and alarm signal. In this paper, a single data lines extend multiple temperature sensor design methods and gives the system implementation of hardware and software flow diagram. The experimental tests show that this high accuracy, strong anti-interference ability, alarm timely and accurate, with a certain reference value. The system design and layout simple pact structure, small size, light weight, anti-jamming capability, cost-effective to expand convenience, in large warehouses, factories, construction and other areas of intelligent multi-point temperature measurement in a wide range of applications prospects.
Key words: digital temperature sensor; single bus; communication protocols; DS18B20; AT89C2051; LED display; alarm signal.
目录
摘要 I
ABSTRACT II
目录 III
第一章:绪论 1
:课题背景 1
:温度检测与及报警系统的国内外状况 1
:温度参数、温度检测和语音报警 3
温度参数 3
温度检测 3
语音报警 3
第二章:系统总体设计方案 3
单片机语音温度报警系统的总体设计 3
系统的基本工作过程 4
第三章:单片机温度控制和语音报警系统硬件设计 5
温度控制和报警主机 5
5
AT89S51特点 5
AT89S51主要功能特性: 6
温度检测和报警主机硬件电路设计 9
10
语音电路 11
ISD1420芯片简述 11
芯片引脚介绍 12
芯片工作原理 13
芯片工作模式 13
14
DS18B20芯片简介 14
14