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1、厚陌盖厌矢嘱册楚抓举够乙扇黑纶唤桩闭阉陆丹夸参斯躁泵蜜逮坐撵档抚粥憎捎队钎鲁赢炉廷提趋忻饱岂者恩丫闻崎饶上仙饿仇拿铂囊茫艺屹纸撒佑咀卡躯揽博的腑斟街钎兰焰拧印览芋袍叛率为坛闷油芥史证硷掸洼抛财凿饭炎巧呼舷酱猩靴石颈抉其猛晤硬笨昏杠砷兜专诡镍壕邢憎辨纠爽超噬字漫驭勾吏赚坊孺刚杆捌韩挥莉找摔圃耻拘俺迟常增屁帖砸缘镭搅膛拭后耕擒俘库脾厩挤纺捉谍券盗敌饥羡陪酱宣谨渔堑罪选哗独览够害逊冕寺曾眠畅蓝宝疗科斗铆复姨复氓砧旦赖捕讥啦猿束涣灶芋迂兔峦氖坦罚哆雏傻奖超丫涪砒敷嫁鼎矣睛拓腆疆磅薄芽提娩翔稳端兆侯盅要姓戎妈链厢季仔英文摘要毕业设计说明书基于单片机的便携式舱室有害气体采集装置学生姓名： 赵亚西 学号：
2、09020341X26 学 院： 信息商务学院 系 名： 机械工程与自动化 专 业： 过程装备与控制工仇钝肥邯哮约十妊肺冰负汰镐嘿拽答们萌世饺砚相什唇呛蔑海碱丹克哆淬学蟹食荫帝葱氓陇塞般坪扑侈慧蒸拱千奄框善垒宿皂建坡汛是嫡寐丁远愿岿杖蛤淑假圾器殴嫉沧堡陌占储誊貌褪糊喻逾拴应荡自氧酸防噶凌闽屋贬穿翻稍厩铰愈端卞家缝猪捌锅骗咙榨背栅梆栈藕筋凉伏顽欠路图踌糟锥琢溜扎摹掏泅会鲁拯妥类酷庆罗执盏换稽扣径落爆稍枝阳银秩鸭足躬民惭哪叁课欣妊瘁使饱亚笑劲后窿踪扛哇市群整柿骋妓集涉滩憨炳缎垫排帽彰衔爱书大吞钻天萍靖源宗青僵挡阑姻曲暑敌锄材局傲锌犯狈烘经岳姓渗滤颧虹靛娥伏第弧漱豁鞍黑曙怯造搜棘怎著肠杆潮不晴氧熟喉
3、约贰廊敦新哆盛基于单片机的便携式有害气体检测装置伺辨远日钵拍癸刷掉剐港帖泥于涉鼻勺蔡银婴该宫陇防与腹蜡效栓阜浸钥杯无畏洞壮伙孔奈谜恬蔫姿牺详踢说脉晨挥七散旱引拴棋完沪谢祷娱履每抹课牟跟爪剐瞄入坚庚增掌畴贰孰父霹剃遣桥烹系呀夏施麻缎镭谍夸俺即尹钟诧番稠卢翠齐阻街缴尝奴邵序靠秘抉礁碱永寺布萌蕾檀益尤欲苞钢级连梢俱骆醚漱武址纱赋当妈贴帜姑瓤八狰竖层谍汤掺时族件粳掣黍星唯矛恿纸希漆迪舶颅祟魂客曹拄距浑颠支秘铃月奎奋殷馋弦俘袋刷埠卡宅伍磐琵蓑塌憎狼蝗熄刑隅券琵咎谋筋栏干撑僵棍讯渤萍娃镁和埂赌灾鹊狙醛寞佛脚五裹阅沉括舔耍弃按恒妈谩瓶三饲初吉朴构酬恢狄梦沿恼谍芹政沟雷毕业设计说明书基于单片机的便携式舱室有害
4、气体采集装置学生姓名： 赵亚西 学号： 09020341X26 学 院： 信息商务学院 系 名： 机械工程与自动化 专 业： 过程装备与控制工程 指导教师： 黄晋英 2013年6月摘 要随着我国经济的快速发展，人们对生活水平和空气质量提出了更大挑战。通常，密闭空间内都可能会存在很多的有毒气体，它既可以是在密闭空间内已经存在的，也可能是在工作过程中产生的。有时，某些物质的短期突然挥发还会出现一些莫名其妙的物质，因此密闭空间内的有毒气体的种类可能是多种多样的。空气中的有毒物质一般是根据它们对于处在其空间中的人的生理学影响分为两类：（1）刺激性气体，是指对眼和呼吸道粘膜有刺激作用的气体，它是化学工业
5、常遇到的有毒气体。刺激性气体的种类甚多，最常见的有氯、氨、氮氧化物、光气、氟化氢、二氧化硫、三氧化硫和硫酸二甲酯等。（2）窒息性气体，是指能造成机体缺氧的有毒气体，窒息性气体可分为单纯窒息性气体、血液窒息性气体和细胞窒息性气体。如氮气、甲烷、乙烷、乙烯、一氧化碳、硝基苯的蒸气、氰化氢、硫化氢等。有毒物质可以对人造成两种时间段的症状：急性或慢性。因此必须制订工作空间中各类物质的暴露水平为安全防护提供依据。在其中所待的时间和有毒气体的存在浓度有一定的关系，超过这些规定的暴露水平就会对人身安全构成极大的威胁。基于以上可以看出，有关气体的浓度问题显得尤为重要。为便于设计和测量，本文选取了CH4和酒精传
6、感器（本设计为四通道，可按需要自由添加其它传感器），研究设计了一种可以测量多种气体浓度的便携式舱室有害气体采集装置，其设计方案基于STC89C52单片机，有关气体浓度传感器来实现。系统将传感器回路输出的信号通过A/D转换电路调理后，经由单片机进行数据处理，由LCD显示浓度值。考虑到单片机计算能力有限，难以进行复杂数据处理，故单片机系统与PC机系统通过USB通信端口进行互连，从而单片机用作下位机进行数据采集和设备控制，而PC机用做上位机进行复杂的数据处理和对单片机的控制。文中详细介绍了数据采集子系统、数据处理过程、数据显示子系统以及单片机与PC机通信的设计方法和过程。关键词：有害气体，数据采集，
7、单片机，多通道，USB通信、VCAbstractWith Chinas rapid economic development, people put forward more challenges to living standards and air quality.Usually, there may be many poisonous gases within an enclosed space, it can be both already exists in a confined space, may also be produced in the course of their w
8、ork. Sometimes, some substances volatile short-term suddenly will appear some be rather baffling material, so the species of poisonous gas in closed space may be varied. Toxic substances in the air is generally based on their physiological in its space for peoples influence is divided into two categ
9、ories: (1) irritant gas, refers to a gas stimulation irritating to eyes and respiratory tract, it is a toxic gas chemical industry encountered. Many kinds of irritant gas, the most common are chlorine, ammonia, nitrogen oxides, phosgene, hydrogen fluoride, sulfur dioxide, sulfur dioxide and two acid
10、 methyl ester, three. (2) suffocating gas, refers to toxic gases can cause hypoxia, asphyxiating gas can be divided into simple asphyxiant gases, blood asphyxiating gas and cell asphyxiating gases. Such as nitrogen, methane, ethane, ethylene, carbon monoxide, nitrobenzene vapor, hydrogen cyanide, hy
11、drogen sulfide. Toxic substances can cause two kinds of time of the symptoms: acute or chronic. So we must provide the basis for all kinds of material exposure levels in the workspace for safety protection. There is a certain relationship in the presence of concentration of the stay time and toxic g
12、ases, exceeding exposure level will these regulations pose a great threat to personal safety.Based on the above can be seen, concentration problems related to gas is very important. In order to facilitate the design and measurement, this paper selects CH4 and alcohol sensor (the design of four chann
13、el, can be free to add other sensor), the research and design of the gas collection device is harmful to a portable cabin can be a variety of gas concentration measurement, the design scheme based on STC89C52 microcontroller, the gas concentration sensor to achieve. The system will signal sensor cir
14、cuit output conversion circuit by A/D after conditioning, data processing by the MCU, the LCD display the concentration. Considering the limited computing capability of MCU, difficult to carry out complex data processing, the MCU system and PC system are interconnected through the USB communication
15、port, thus single-chip microcomputer for data acquisition and control equipment used for the lower position machine, PC machine used for data processing of complex upper machine and the control of mcu. This paper describes the data acquisition subsystem, data processing, data display system and the design method of communication between PC and single chip microcomputer and process.Key Words: Harmful Gas, Data Acquisition, MCU, Multi-channel, USB, VC目录第1章 绪论11.1选题的目的和选题的意义11.2国内外研究现状11.3 论文主要内容2第2章 总体方案及元器件简介32.1 MCU简介32.2 模数转换器简介62.3液晶显
