煤气泄漏自动检测系统――周涛(加软件)

洛阳理工学院毕业设计（论文）I煤气泄露自动检测系统摘要随着经济和科学技术的快速发展,人们对生活质量的提高和生活环境的改善越来越重视,液化气、煤气进入家庭的使用为人们带来了方便,也改善了城市的环境,但同时也给人们带来了潜在的危险,其中一氧化碳是最主要的危险源。一氧化碳是一种无色无味同时这些气体燃料在使用中，若管道和阀门密封不好，它们泄露出去，轻者引起中毒，重者造成火灾，危及人们的生命财产。由于这些原因，对于气体的检测与控制就变得很重要了，研究各种气体的检测方法与气体传感器也随之成为一个重要课题。本论文主要实现管道煤气泄露的测量与报警，系统主要以半导体气体传感器为研究对象，以单片机为核心构成一个具备数据采集、对象控制、结果显示、数据通信等功能的完整系统。通过虚拟仪器LabVIEW进行控制之后，再通过计算机I/O接口输出;输出信号驱动相应的驱动电路，分别控制报警灯、蜂鸣器及切断电路，实现对煤气泄露事故的实时监测及控制;程序实时监测系统状态。关键词：气体传感器，单片机，数据采集，LabVIEW洛阳理工学院毕业设计（论文）IIGASLEAKDETECTIONSYSTEMAUTOMATICALLYABSTRACTWiththerapiddevelopmentofeconomyandthesciencetechnology，peoplebecomepaymoreandmoreattentiontothequalityoflifeandimprovingtheenvironment,andgasintothefamilytheuseofconvenienceforpeople,butalsotoimprovetheurbanenvironment,butalsotopeoplewithtothepotentialdangers,includingtheriskofcarbonmonoxideisthemostimportantsource.Ifnotsealedpipesandvalves,theyleaked,lightcausedpoisoning,causedbyheavyfire,endangeringpeople'slivesandproperty.Forthesereasons,soitisveryimportantforustoinspectandcontrolthesegaseswell.Anditisobviouslyveryimportanttostudyontheinspectionmethodsandsensorsofallkindsofgases.Inthispaper,themaingasleakmeasurementandalarmsystemstothesemiconductorgassensorforthestudyinordertoconstituteasingle-chipmicrocomputerasthecorewithdataacquisition,objectcontrol,resultsshowedthatfeaturessuchasdatacommunicationsystemofintegrity.ThroughtheVirtualLabVIEWcontrolapparatus,andthenthroughcomputerI/Ointerfaceoutput;outputsignalsdrivethecorrespondingdrivingcircuits,respectively,controlthealarmlight,buzzerandcutoffthecircuit,therealizationofthegasleakonthereal-timemonitoringandcontrol;proceduresreal-timemonitoringofsystemstate.KEYWORDS:gassensor，Singlechipmicrocontroller,dataacquisition,LabVIEW洛阳理工学院毕业设计（论文）III目录前言................................................................................................1第1章绪论......................................................................................21.1论文研究来源、目的和意义.................................................21.1.1论文研究来源.............................................................21.1.2论文研究目的和意义.................................................21.2可燃性气体报警器的国内外现状.........................................31.3本论文主要任务....................................................................4第2章煤气泄露自动测试总体设计.................................................52.1设计要求................................................................................52.1.1煤气泄露测试的功能..................................................52.1.2煤气泄露测试系统框图...............................................52.1.2煤气泄露测试的各个功能模块...................................62.2设计原理................................................................................62.2.1气体传感器介绍..........................................................72.2.2气体传感器的选定......................................................72.3数据处理................................................................................92.3.1传感器非线性信号处理...............................................92.3.2数字滤波处理..............................................................9第3章煤气泄露自动测试硬件设计...............................................113.1温度补偿电路......................................................................113.1.1OP07低噪声高精度运算放大器...............................113.1.2温度补偿....................................................................123.2模/数转换器ADC0809........................................................123.2.1ADC0809的介绍.......................................................123.2.2引脚功能....................................................................133.2.3主要特性....................................................................143.3单片机AT89C51的概述.....................................................153.3.1AT89C51简介............................................................15洛阳理工学院毕业设计（论文）IV3.3.2主要性能参数............................................................153.3.3管脚说明....................................................................163.4声光报警与LED显示........................................................193.4.1声光报警单元............................................................193.4.2LED显示...................................................................203.5排气扇控制系统与切断阀..................................................213.5.1光电隔离器................................................................213.5.2继电器选择................................................................223.5.3光电隔离电路............................................................23第4章接口总线...............................................................................254.1RS-232接口总线.................................................................25第5章部分软件程序.....................................................................285.1部分单片机程序.................................................................285.1.1主程序........................................................................285.1.2数据采集程序............................................................295.1.3A/D转换程序........................................................