基于51单片机的数字温度计-毕业设计

西南科技大学本科毕业论文I数字测温计设计摘要：随着时代的进步和发展，单片机技术已经普及到我们生活、工作、科研、各个领域，已经成为一种比较成熟的技术。在工业生产中温度是常用的被控参数，而采用单片机来对这些被控参数进行控制已成为当今的主流。本文主要介绍了一个基于AT89S51单片机的测温系统，详细描述了利用数字温度传感器DS18B20开发测温系统的过程，重点对传感器在单片机下的硬件连接，软件编程以及各模块系统流程进行了详尽分析，对各部分的电路也一一进行了介绍,该系统可以方便的实现实现温度采集和显示，并可根据需要任意设定上下限报警温度，它使用起来相当方便，具有精度高、量程宽、灵敏度高、体积小、功耗低等优点，适合于我们日常生活和工、农业生产中的温度测量，也可以当作温度处理模块嵌入其它系统中，作为其他主系统的辅助扩展。DS18B20与AT89S51结合实现最简温度检测系统，该系统结构简单，抗干扰能力强，适合于恶劣环境下进行现场温度测量，有广泛的应用前景。关键词：单片机；温度传感器；数字温度计西南科技大学本科毕业论文IIDesignOfTheDigitalDhermometerAbstract：Withtheprogressanddevelopmentofera,microcontrollertechnologyhasbecomepopularinourlife,inthework,thescientificresearchandvariousfields,hasbecomearelativelymaturetechnology.Thetemperaturemeasurementmethodanddeviceofthehighlightsisveryimportant.Posedbythesinglechiptemperaturesensorandtemperaturemeasurementsystemcanbewidelyappliedinmanyfields.ThearticlemainlyintroducedbasedontheAT89S51monolithicintegratedcircuit'stemperaturemeasurementsystem,describedtheusedigittemperaturesensorDS18B20developmenttemperaturemeasurementsystem'sprocessindetail,keytosensor'sundermonolithicintegratedcircuithardwareconnection,thesoftwareprogrammingaswellasthevariousmodulessystemflowhascarriedontheexhaustiveanalysis,11hasalsocarriedontheintroductiontovariouspartofelectriccircuits.Thissystemmayfacilitaterealizestemperaturegatheringandthedemonstration,andmayaccordingtoneedtoestablishtheboundwarningtemperaturewillfully,itusesquiteconveniently,hastheprecisiontobehigh,themeasuringrangewidth,thesensitivityarehigh,thevolumeissmall,thepowerlosslowstatusmerit,suitsinourdailylifeandtheindustry,theagriculturalproductiontemperaturesurvey,mayalsotreatasthetemperatureprocessingmoduletoinsertinothersystems,takesotherhostsystem'sauxiliaryexpansion.DS18B20andat89S51unionrealizesthemostJantemperatureexaminationsystem,thissystemstructureissimple,antijammingability,suitsundertheadversecircumstancecarriesonthescenetemperaturesurvey,hasthewidespreadapplicationprospect.Keywords:microcontroller;temperaturesensor;temperaturemeasurementsystem西南科技大学本科毕业论文III目录第1章绪论.........................................................................................................................11.1温度计的介绍.........................................................................................................11.2选题的目的和意义.................................................................................................21.2.1选题的目的....................................................................................................21.2.2选题的意义....................................................................................................2第2章数字温度计的设计方案.........................................................................................42.1设计方案的确立及论证.........................................................................................42.1.1温度传感器DS18B20的选择.....................................................................42.1.2显示器的选择...............................................................................................52.1.3单片机AT89S51的选择..............................................................................5第3章系统硬件电路的设计.............................................................................................73.1主控制器.................................................................................................................73.1.1AT89S51的介绍............................................................................................73.1.2DS18B20的介绍...........................................................................................93.1.3DS18B20使用的注意事项.........................................................................163.2单片机最小系统设计...........................................................................................173.2.1时钟电路.....................................................................................................173.2.2复位电路...................................................................................................183.2.3最小系统.....................................................................................................193.3DS18B20与单片机接口电路的设计...................................................................203.4显示电路的设计...................................................................................................203.4.11602LCD液晶简介.....................................................................................20第4章系统程序的设计...................................................................................................244.1系统设计内容.......................................................................................................244.1.1主程序.........................................................................................................244.1.2读出温度子程序.........................................................................................244.1.3温度转换命令子程序.................................................................................254.1.4计算温度子程序..................................................................