摘要本次系统设计是以AT89C51单片机以及DS18B20温度传感器为硬件基础的多点温度测量系统。以51单片机为主控模块，完成各个测点的准确温度测量，并添加了温度数值显示以及温度提醒等。保持显示模块LCD1602A以进行识别和显示。LCD1602A作为液晶显示器,形象直观的显示测出的温度值。选取DS18B20作为温度数据采集端，对测点实施有效温度测定，该传感器模块精度较高，误差在0.1℃范围内。此文首先在绪论中详细的介绍了此系统的发展背景以及使用的功能及其意义。第二章确定设计方案。在第三章论述了总体的设计过程，确定了技术指标和元件的选择进行了设计中的硬件框图设计、硬件电路设计及所系统中各种芯片功能与使用方法。第四章则着重分析了设计的每个过程。最后一章是对系统设计过程中的软件以及调试环节进行了具体阐述。多点温度测定是基于AT89C51完成开发，具备模块构造简单和多点温度检测功能、数字显示、精准度高使用范围广范的特点，在实际的生产、生活中得到广泛应用。关键词：数字温度传感器，AT89C51单片机，单总线AbstractThesystemmainlyusesadistance-freemulti-pointtemperaturemeasurementsystembasedonAT89C51single-chipmicrocomputerandDS18B20temperaturesensor.ThesystemusesAT89C51single-chipmicrocomputertosequentiallydetectthetemperatureofeach1monitoringpointtorealizethefunctionsoftemperaturedetection,displayandoverheating.Thesystemmainlyusesthesingle-chipAT89C51microcomputerasthecontrolcoreofthemainsystem.ThedisplaymoduleLCD1602Aisheldforidentificationanddisplay.LCD1602Aisusedasaliquidcrystaldisplaytovisuallydisplaythemeasuredtemperaturevalue.ThedigitaltemperaturesensorDS18B20isusedtodetectthetemperatureofeachchannel,andthemonitoringaccuracycanreach0.1°C.Thisarticlefirstintroducesindetailthedevelopmentbackgroundofthesystemandthefunctionsusedanditssignificanceintheintroduction.Thesecondchapterdeterminesthedesign.Inthethirdchapter,theoveralldesignprocessisdiscussed,andthetechnicalindicatorsandcomponentselectionaredetermined.Thehardwareblockdiagramdesign,hardwarecircuitdesignandvariouschipfunctionsandusagemethodsinthesystemarecarriedout.Thefourthchapterfocusesontheanalysisofeachprocessofdesign.Thefinalchapterdetailsthedebuggingsoftwareanddebuggingissuesofthesystem.Themulti-pointtemperaturemeasurementandcontrolsystemisbasedonasingle-chipAT89C51single-chipmicrocomputer.Ithasasimplehardwarestructure,multi-pointtemperaturedetectionfunction,digitaldisplay,highprecisionandwiderangeofapplications.Itiswidelyusedinactualproductionandlife.Keywords：digitaltemperaturesensor,AT89C51singlechip,single-bus2目录摘要..........................................................-1-第1章绪论.................................................-4-第2章系统方案设计.............................................-6-2.1方案设计..................................................-6-2.2方案论证..................................................-7-第3章系统设计.................................................-8-3.1工作原理..................................................-8-3.2单元电路设计.............................................-10-3.2.1DS18B20与单片机接口电路设计..........................-10-3.2.2键盘电路设计..........................................-18-3.2.3显示电路设计..........................................-21-3.2.4报警电路设计.........................................-24-第4章系统软件设计...........................................-25-4.1软件设计总体思路及主程序流程图...........................-25-4.2测温模块流程图...........................................-26-4.2.1温度的采...
