简易照度计的设计

本科毕业设计（论文）(2015届)题目：简易照度计的设计专业：电子信息工程班级：电工本一姓名：学号：指导教师：职称：副教授完成日期：2015年4月20日本科毕业论文I摘要在科技技术极速发展的现在，自然界所存在的一些物理特性，我们总能找到测量他们的方法，如温度、湿度、力度、速度或者声音甚至是光亮度，曾经的我们只能用手、耳朵、鼻子或者是眼睛这些器官去感受，去观察，去研究他们的规律以及生活中的功能，但这些方法总是笼统的，而现在，通过对应的传感器，我们就能将这些物理特性具体化，数据化，信息化，为我们的研究带来科学化的指导。就如照度计的诞生，就能把看得到却摸不到的光数据化，让我们不再是用某个形容词去概括光的亮度，而是用数据更加形象化的体现。本设计采用光敏电阻作为光传感元件，依据光敏电阻特性：其阻值随着光照强度的变化而变化（入射光强度增大，电阻减小；入射光强度减小，电阻增大），结合光敏电阻的光照特性，简易的完成对光的大小测量。本设计电路结构简单，成本低，操作简单，能够简单的对光强度进行测量。关键词：传感器；光敏电阻；光强度；本科毕业论文IIAbstractSpeedevelopmentoftechnologyinsciencenow,someofthephysicalcharacteristicsthatexistinnature,wecanalwaysfindtheirwaytomeasure,suchastemperature,humidity,intensity,speedorsoundevenbrightness,oncewecanonlyhands,ears,noseoreyes,theseorganstofeel,toobserve,tostudylawandtheirlifefunctions,butthesemethodsarealwaysvague,Andnow,throughthecorrespondingsensor,wewillbeabletothesespecificphysicalcharacteristics,data,information,guidanceforustobringscientificresearch.Asthebirthofilluminancemeter,willbeabletoseebutnottouch-basedopticaldata,sowearenolongeranadjectiveusedtosummarizethebrightnessoflight,butwiththedatamorefigurativeexpression.Thedesignusesaphotosensitiveresistanceasthelightsensor,basedonaphotosensitiveresistancecharacteristics:itsresistancewithchangesinlightintensitychanges(incidentlightintensityincreases,theresistancedecreases;theincidentlightintensitydecreases,theresistanceincreases),combinedphotoresistorilluminationcharacteristics,lightandeasytocompletesizing.Thedesignofthecircuitstructureissimple,lowcost,simpleoperation,thelightintensitycanbeeasilymeasured.Keywords：correspondingsensor；photoresistor；lightintensity；本科毕业论文III目录1绪论...............................................................................................................................-1-1.1前言......................................................................................................................-1-1.2照度计研究的意义及应用..................................................................................-1-1.3任务目标..............................................................................................................-1-1.4设计的主要工作..................................................................................................-2-1.5本文的主要内容..................................................................................................-2-2简易照度计的硬件设计...............................................................................................-3-2.1中央处理器STC89C52.......................................................................................-3-2.2光线采集模块......................................................................................................-4-2.2.1光敏电阻...........................................................................................................-4-2.2.2模数转换器ADC0832芯片............................................................................-4-2.3显示模块..............................................................................................................-5-3简易照度计的软件设计...............................................................................................-6-3.1主程序的设计......................................................................................................-6-3.2子程序设计..........................................................................................................-7-3.2.1ADC0832芯片子程序......................................................................................-7-3.2.2数据显示处理子程序.......................................................................................-8-4硬件检查、仿真调试、结果分析...............................................................................-9-4.1软件调试..............................................................................................................-9-4.2硬件检查.............................................................................................................-9-4.3结果分析.............................................................................................................-9-4.3.1“查表法”...........................................................................................................-9-4.3.2线性拟合法....................................................................................................-10-4.3.3非线性分段拟合............................................................................................-10-5结论...........................................................................................................................-13-致谢..........................................................................................................................-14-参考文献.........................................................................................错误!未定义书签。附录Ⅰ原理图.................................................................................错误!未定义书签。附录Ⅱ元件清单......................................................................................................-15-附录Ⅲ程序............................................................................................