摘要：本文设计的基于430单片机的室内煤气与天然气泄漏报警器，采用气敏传感器检测空气中燃气的浓度。当气敏传感器遇到燃气时，传感器电导率随燃气浓度而变化，随之产生的电信号的变化经过调理电路处理后，输入到单片机内与已知数据进行比较，并将所得结果显示在液晶屏上。若空气中燃气浓度大于预设的安全值，则触发声光报警装置。同时再利用温度传感器，检测室内温度，并通过类似的方法显示在液晶屏上。本课题所设计的天然气泄漏报警器不仅显示结果醒目、精确，而且具有体积小、功耗低、使用方便等优点。本文给出了系统的设计方案以及各个部分硬件设计原理。
关键词 天然气泄漏报警器 单片机 传感器
毕业设计说明书外文摘要
Title Design of Indoor Gas and Natural Gas Leakage Alarm Based On Single Chip Microcomputer
Abstract：In this paper, design of the gas leakage alarm system based on 430 single chip microcomputer, use gas sensor to detect the concentration of the gas in the air. When gas sensor in the gas sensor resistance varies with gas concentration changes, the resulting signals by modulation circuit processing, comparing with the known data input to the single chip microcomputer, and the results displayed in the LCD screen. If the air in the gas concentration is greater than the set of TVC, trigger the acousto-optic alarm device. Recycle temperature sensor at the same time, the detection of indoor temperature, and through a similar method displayed on the LCD screen. This topic designed by gas leak alarm display the results not only smart, accurate, and has advantages of small volume, low power consumption, easy to use. This paper presents a design scheme of the system and the hardware design principle of all parts.
Keywords Gas leakage alarm Gas sensor Single chip microcomputer
目 次
1 绪论 1
1.1 设计背景及意义 1
1.3 设计任务及要求 2
2 燃气报警器的系统设计方案 4
2.1 系统总体框图 4
2.2 测量原理简介 4
3 燃气泄漏报警器的硬件设计 5
3.1 MSP430单片机电路设计 5
3.2 气体传感器模块与接口电路 8
3.3 温度采样电路 10
3.4 键盘输入电路 12
3.5 声光报警模块 12
3.6 液晶显示模块 13
4 燃气泄漏报警器的软件设计 19
4.1 软件设计任务 19
4.2 软件设计工具 19
4.3 主程序 20
4.4 气体传感器程序 21
4.5 温度采样程序 22
4.6 声光报警程序 23
4.7 液晶显示程序 24
4.8 按键输入程序 MSP430单片机室内煤气和天然气泄漏报警器的设计:http://www.chuibin.com/zidonghua/lunwen_206404.html