基于单片机的智能型电导监测仪的设计

I摘要伴随着科学技术的飞速发展，单片机的应用正在不断地走向深入，同时带动智能检测技术的高速发展。在实时检测的单片机应用系统中，单片机往往是作为核心来使用，但仅有单片机方面知识是不够的，还应根据具体硬件结构，以及针对具体应用对象特点的软件结合，以使设计、生产更加完美。随着科学技术的不断创新，越来越多的领域需要对液体内部的粒子含量和成分进行精确检测。本装置就是采用STC89C51单片机作为核心，辅以温度检测电路、电导率测量电路以及一些必须的单片机外围电路来实现对溶液中电导率的检测。检测电导池中粒子的含量并记录下来为系统的主要功能，其主要模块除单片机控制部分外，还有温度检测，电导率检测。以及通过扩展8155H芯片完成键盘和显示电路的设计。并具有报警等功能，使用灵活方便。关键词：STC8155H电导率粒子8155HIIThetesterofConductivityAbstractWiththerapiddevelopmentofscienceandtechnologytheapplicationofSCMiscontinuouslytowarddeeperanddeeper.Meanwhiledrivesmartdetectionoftechnologydevelopmentinhighspeed.Inreal-timedetectionofmicrocomputerapplicationsystem,theSCMisoftenusedasacore.Butonlymicrocontrolleraspectsknowledgeisnotenough,stillshouldaccordingtothespecifichardwarestructureandtheviewofthespecificapplicationobjectcharacteristicsofsoftwarecombinedtomakeadesign,productionmoreperfect.Alongwiththescienceandtechnologyunceasinginnovation,moreandmorefieldsofliquidinternalparticlesneedaccuratetestingcontentandconstituents.ThisdeviceisusingSTC89C51asthecore,andcomplementarywithtemperaturedetectioncircuit,conductivitymeasurementcircuitandsomeSCMbuffercircuitforsolutiontorealizetheconductivitydetection.Detectionandtorecordoftheparticlecontentofconductancepoolarethesystem'smainfunction.Itsmainmoduleexceptsingle-chipmicrocomputercontrolpartoutside,andtemperaturedetection,conductivitydetection.Andbyextensionchipsof8155Htoachievekeyboardanddisplaycircuitdesign.Andhasthealarmfunctions,useagileandconvenient.Keyword:STC8155HConductivityParticles8155HI目录第一章绪论.........................................................................................................................11.1课题研究的目的及意义..........................................................................................11.2课题研究背景及国内外研究现状.........................................................................11.3课题研究的主要内容.............................................................................................2第二章系统总体设计方案.................................................................................................42.1主要技术指标..........................................................................................................42.2系统总体方案论证..................................................................................................42.3电导率测试仪硬件结构图......................................................................................62.4系统软件流程图......................................................................................................7第三章系统硬件介绍及电路原理.....................................................................................83.1AT89C51单片机特性及管脚接线介绍..................................................................83.1.1AT89C51性能介绍........................................................................................83.1.2AT89C51主要接线介绍...............................................................................93.1.3振荡器特性.................................................................................................103.1.4芯片擦除.....................................................................................................113.1.5C51单片机处理器状态..............................................................................113.1.6C51单片机的中断系统..............................................................................113.1.7AT89C51最小系统......................................................................................123.2温度部分的选择...................................................................................................123.2.1温度传感器的选择.....................................................................................123.2.3模拟开关电路..............................................................................................133.2.4A/D转换器和ADC0809简介....................................................................143.2.5MCS-51单片机控制ADC的工作过程..................................................153.2.6温度检测电路.............................................................................................163.3电导率测量部分...................................................................................................163.3.1电导率测试仪的工作原理.........................................................................163.4方波激励电路的设计............................................................................................173.5键盘和显示部分...................................................................................................193.5.18155H简介..................................................................................................193.5.2按键部分.....................................................................................................203.5.3显示部分.....................................................................................................21II3.5.4键盘和显示部分电路图.............................................................................223.6电源电路................................................................................................................223.7报警电路设计..................................