爱华网题目院（系）专
年业级电子与信息技术系智能产品开发Mars作者姓名二○一六年十二
月
摘要
随着社会文明的发展，人类科学技术的进步，各个行业都在使自己的产品智能化、数字化，而传统的空气净化仪一般采用内部滤网净化，采用负离子进行净化的产品比较少，即使有，其价格也是相当昂贵，不能很好的满足大部分老百姓日常对洁净空气的追求。现在在市场上出现的既可以显示温度、湿度、PM2.5值以及烟雾值，又可以有净化和烟雾报警功能，还可以通过手机云端进行控制的产品必定是非常昂贵的奢侈品。本产品是基于物联网平台，利用PWM脉宽调制技术和可控硅开关技术相结合，通过负离子发生器产生负离子以实现智能净化空气的目的，并且可以通过不同模式的选择来调整净化空间以及净化功率的大小。
关键词：PWM脉宽调制、可控硅开关、物联网、负离子、空气净化。
Abstract：Withthedevelopmentofsocialcivilization,theprogressofhumanscienceandtechnology,variousindustriesaremakingtheirproductsintelligent,digital,andthetraditionalairpurificationinstrumentgenerallyusetheinternalfilterpurification,theuseofnegativeionstopurifytheproductisrelativelysmall,,Thepriceisquiteexpensive,notverygoodtomeetmostpeople'sdailypursuitofcleanair.Nowappearonthemarketcandisplaythetemperature,humidity,PM2.5valueandthesmokevalue,butalsocanhavepurificationandsmokealarmfunction,butalsothroughthemobilephonecloudcontrolproductsmustbeveryexpensiveluxury.ThisproductisbasedontheInternetofThingsplatform,theuseofPWMpulsewidthmodulationtechnologyandsiliconswitchingtechnologycombinedthroughthenegativeiongeneratortoproducenegativeionstoachievethepurposeofintelligentairpurification,andthroughdifferentmodesofchoicetoadjustthepurificationspaceandpurificationThesizeofthepower
Keywords:PWMpulsewidthmodulation,Thyristorswitch,Internetofthings,Anion,Airpurification.
目录
摘要................................................................................................................................................................2
关键词：............................................................................................................................................................2
目录................................................................................................................................................................3
第一章绪论......................................................................................................................................................5
1.1课题研究的历史背景：.....................................................................................................................5
1.2课题研究的目的及意义：.................................................................................................................6
1.3国内外同类产品分析：.....................................................................................................................7
1.4本章小结..............................................................................................................................................7
第2章系统概述............................................................................................................................................8
2.1系统参数及技术指标........................................................................................................................8
2.2系统功能介绍.....................................................................................................................................9
2.3工作原理及工作流程........................................................................................................................9
2.4本章小结...........................................................................................................................................10
第3章方案论证..........................................................................................................................................10
3.1传感器的选择...................................................................................................................................10
3.1.1.1温湿度传感器的种类........................................................................................................10
3.1.1.2温湿度传感器的主要参数................................................................................................11
3.1.1.3温湿度传感器性能说明....................................................................................................12
3.1.1.4温湿度传感器典型应用电路............................................................................................12
3.1.1.5串行接口（单线双向）..................................................................................................13
3.1.2.1PM2.5传感器的选择..........................................................................................................14
3.1.2.2PM2.5传感器的原理..........................................................................................................15
3.1.2.3PM2.5传感器的驱动条件.................................................................................................15
3.1.2.3PM2.5传感器的检出方法.................................................................................................15
3.1.2.4烟雾传感器的选择............................................................................................................16
3.2电机驱动芯片的选择......................................................................................................................18
3.2.1电机驱动芯片的介绍...........................................................................................................18
3.2.2电机驱动芯片参数...............................................................................................................19
3.2.3L298N电机驱动芯片管脚参数............................................................................................19
3.2.4TLP521光耦隔离芯片参数..................................................................................................20
3.2.5TLP521光耦隔离芯片规格..................................................................................................22
3.3可控硅的选择...................................................................................................................................22
