基于MSP430F149单片机的手持式室内气体检测仪的设计（毕业学术论文设计）.doc

目录 PAGE XXXIV PAGE XXXIV 摘 要 本设计采用以超低功耗为最大特点的MSP430F149单片机为主控制器，采用数字式温湿度一体的传感器DHT11采集室内温湿度，MQ系列中的MQ2气敏传感器检测CO危险气体等信息。当温湿度超过预设的上限值，CO浓度超过安全值时，能够及时进行声光报警，并在LCD显示器上显示检测结果及报警信息，达到保护人身和财产安全的目的。设计同时结合按键控制和实时时钟功能，共同完成基于MSP430F149为核心控制器，以手持式、便携式、低功耗为目的手持式室内气体检测仪的设计。本设计功能多、灵敏度较高、可靠性、实用性强。本设计说明书从气体的检测原理入手，详细阐述了室内气体的检测过程，及相应的硬件设计和软件设计。 关键词：MSP430F149单片机，传感器，气体检测，LCD显示 Abstract The design use MSP430F149 microcontronller which featuring in lowest power consumption as the main controller,sellect digital sensor DHT11 integrated temperature and humidity,MQ2 gas sensitive sensor of MQ serials for detecting CO gas information.When temperature or humidity upper than default value,CO density exceed security value,it make acoustooptical alarm and shows gases density, humidity and alarm information on a LCD monitor to protect people’s lives and properties. The design also has key-press control and real time clock,completed based MSP430F149 as the core controller,witha hand-held,portable,low power consumption for the purpose of hand-held interior design of gas detector.The design is multi-functional, highly sensitive, reliable and pragmatic.The design introduction from gas detection theory as start, illustrated the procedure of indoor gas detection in detailed,and the hardware design ,software design. Key words: MSP430microcontronller, sensor, gas dectect, LCD display PAGE I 目 录TOC \o 1-3 \h \u HYPERLINK \l _Toc22674 第1章 绪论 PAGEREF _Toc22674 1 HYPERLINK \l _Toc11340 1.1 手持室内气体检测仪概述 PAGEREF _Toc11340 1 HYPERLINK \l _Toc29357 1.1.1 选题的目的及意义 PAGEREF _Toc29357 1 HYPERLINK \l _Toc6862 1.1.2 国内外发展情况 PAGEREF _Toc6862 2 HYPERLINK \l _Toc12500 1.2 需求分析 PAGEREF _Toc12500 4 HYPERLINK \l _Toc758 1.2.1 市场需求分析 PAGEREF _Toc758 4 HYPERLINK \l _Toc20898 1.2.2 可行性分析 PAGEREF _Toc20898 5 HYPERLINK \l _Toc20822 第2章 总体方案设计 PAGEREF _Toc20822 6 HYPERLINK \l _Toc7740 2.1总体设计结构 PAGERE