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（2015年7月15日课程设计说明书学校代码：10128学号：201220302029题目：高、低限越限声光报警器电路设计学生姓名：孙振山学院：机械学院班级：测控12-2指导教师：徐永祥徐刚内蒙古工业大学测控电路课程设计论文摘要声光报警电路被广泛用于生活和工作当中，用发光和发声等信号来提醒人们。温度报警电路中温度检测是重要的一环。将现场温度控制在一定范围内，是在各种实际应用的重要保证和前提。因此温度检测系统在工业控制领域中十分重要。本论文主要是针对被测量是温度的高低限越限声光报警设计。电路主要由检测电路，放大电路、比较电路、报警电路三部分构成，论文分别针对每一部分的电路进行了展开设计。检测电路采用热敏电阻接在电桥放大电路中，将输出送入到电压比较电路中，电压比较电路采用的是窗口电路。电桥电路的输入值和比较电路的阈值进行比较，如果不在设定的阈值范围内，将会输出高电平触发报警电路，报警电路由555定时器和扬声器、二极管构成。得到高电平信号后扬声器会发出一定频率的声音，二极管会被点亮实现声光报警。此系统的设计可应用于仓库测温、楼宇空调控制和生产过程监控等领域，将来也可以渗入到人们工作和生活的各个角落，有力地推动各行业的技术改造和产品的更新换代，相信会有较好的应用前景。关键字：热敏电阻；越限报警；温度检测；声光报警内蒙古工业大学测控电路课程设计论文AbstractThealarmcircuitiswidelyusedinourdailylifeandwork,remindingpeoplewiththelightandsoundsignals.Temperaturedetectionisanimportantpartintemperaturealarmcircuit.Keepingthetemperatureonspotinacertainrangeisakeyguaranteeandpremiseofvariouspracticalapplications.Therefore,temperaturecontrolsystemisveryimportantinindustrialcontrollingarea.Thisthesisismainlyaimedatthemeasurementofthehighandlowlimitofthetemperatureofthesoundandlightalarmdesign.Thealarmcircuitismadebythedetectioncircuit,theamplifyingcircuit,thecomparisoncircuitandthealarmcircuit.Wedesigneachpartofthecircuitindetail.Thedetectioncircuitcontactsthethermistorintheelectricbridgeamplifyingcircuitandtheoutputisfedintothevoltagecomparatorcircuit,whichusedthewindowcircuit.Theinputvalueofthebridgecircuitiscomparedwiththethresholdofthecomparisoncircuit.Ifitisoutofthethresholdrange,thehighleveltriggerwillbeoutputtothealarmcircuit,whichiscomposedof555timerandspeakeranddiode.Highlevelsignalisobtainedafterthespeakerwillemitacertainfrequencyofsound,thediodewillbelittoachievesoundandlightalarmfinally.Thissystemcanbeappliedtothestoragetemperaturemeasurement,air-conditioningcontrolinbuildings,andproductionprocessmonitoring,andotherareas.Itcanbewidelyusedincommonpeople’slife,wheretheyworkandlive.Itcanbeastrongimpetusfortheupgradingoftechnologyandproductsinmanyindustries.Itisboundtohaveabrightfuture.Keywords:Thermistor;Transcendrangealarm;Temperaturedetection;Soundandlightalarm内蒙古工业大学测控电路课程设计论文目录第一章概论..................................................................................................................11.1研究目的及意义..............................................................................................11.2国内外研究现状..............................................................................................11.2.1国外温度控制系统的发展情况..........................................................11.2.2国内温度控制系统的发展概况..........................................................2第二章温度检测声光报警器设计..............................................................................32.1总体设计方案..................................................................................................32.2.1基于单片机的温度报警电路...............................................................32.2.2基于热敏电阻的温度报警电路...........................................................42.2温度检测电路的设计......................................................................................42.2.1温度检测分类......................................................................................42.2.2温度检测元件......................................................................................52.2.3电路设计及参数计算...........................................................................52.3比较电路的设计..............................................................................................62.3.1窗口比较器介绍..................................................................................62.3.2电位器...................................................................................................72.3.3电路设计及参数计算..........................................................................72.4报警电路设计..................................................................................................82.4.1越限报警原理......................................................................................82.4.2555定时器............................................................................................92.4.3扬声器..................................................................................................92.4.4电路设计以及参数计算.....................................................................102.5总体电路结论................................................................................................11第三章总结及展望....................................................................................................123.1课题研究成果...............................................................................................123.2工作总结........................................................................................................123.3展望................................................................................................................13参考文献......................................................................................................................14内蒙古工业大学测控电路课程设计论文1第一章概论1.1研究目的及意义声光报警器（Audibleandvisualalarm）又叫声光警号，是为了满足客户对报警响度和安装位置的特殊要求而设置。同时发出声、光二种警报信号。报警器经常应用于系统故障、安全防范、交通运输、医疗救护、应急救灾、感应检测等领域，如红外报警