【正文】 示模塊硬件設(shè)計(jì) ...................................................................................... 10 無線發(fā)射接收模塊設(shè)計(jì) ........................................................................................ 11 無線發(fā)射接收模塊簡(jiǎn)介 .............................................................................. 11 無線發(fā)射接收模塊硬件電路 ...................................................................... 12 主 控制電路設(shè)計(jì) .................................................................................................... 13 單片機(jī)簡(jiǎn)介 .................................................................................................. 13 單片機(jī)外圍電路 .......................................................................................... 13 報(bào)警模塊的設(shè)計(jì) ................................................................................................... 14 按鍵模塊的設(shè)計(jì) ................................................................................................... 14 系統(tǒng)整體設(shè)計(jì)原理圖 ........................................................................................... 15 4 系統(tǒng)軟件設(shè)計(jì) ................................................................................................................. 16 系統(tǒng)主程序流程圖 ................................................................................................ 16 系統(tǒng)中的子程序設(shè)計(jì) ............................................................................................ 17 5 仿真與調(diào)試 ................................................................................................................... 20 II Proteus 軟件簡(jiǎn)介 ................................................................................................... 20 系統(tǒng)的仿真與調(diào)試 ............................................................................................... 20 6 實(shí)物的制作與調(diào)試 ......................................................................................................... 22 實(shí)物制作 ............................................................................................................... 22 調(diào)試 ....................................................................................................................... 24 7 結(jié)論 ................................................................................................................................. 25 參考文獻(xiàn) ............................................................................................................................. 26 附 錄 ............................................................................................................................. 27 致 謝 ............................................................................................................................. 70 天津天獅學(xué)院 2020 屆本科生畢業(yè)設(shè)計(jì)（論文） 1 1 緒論 課題背景和研究意義 隨著我國的科技發(fā)展 ,汽車已經(jīng)成為居民生活中的代步必需品。 設(shè)計(jì)分為主控制端和報(bào)警端兩部分，其中負(fù)責(zé)信號(hào)采集的主控制端使用專用傳感器對(duì)汽車尾氣中的 CO 和 的濃度進(jìn)行檢測(cè)，當(dāng)有害氣體排放超過設(shè)定上限時(shí)， STC12C5A60S2 型單片機(jī)控制無線發(fā)射模塊給報(bào)警端信號(hào)，系統(tǒng)產(chǎn)生報(bào)警。本學(xué)位論文原創(chuàng)性聲明的法律責(zé)任由本人承擔(dān)。s maintenance work is not up to the requirements, regularly check is not strictly regulate. In this regard, the simple and portable automobile tail gas detection device, whether it is from the constraint owners increase their petitiveness on the vehicle maintenance of or from increase efforts to implement the monitoring department are harmless and beneficial. Design is divided into a main control terminal and alarm terminal, which is responsible for signal acquisition of the master control terminal using special sensor for automobile exhaust CO and concentrations were detected, when the harmful gas emissions exceed a set upper limit, STC12C5A60S2 MCU control wireless transmission module block to the alarm signal terminal, the system will generate a warning. At the same time, the vehicle emission information can be displayed in real time in LCD, and the main control can also set the alarm threshold reasonably.. This design has some research significance both in the present situation and the promotion and development of the future.. Key Words： SCM。高樓的拔地而起，空氣的流速變得遲緩。由于它在大氣中滯留時(shí)間長(zhǎng)，不僅使室外能見度降低，而且內(nèi)部含有大量的有毒致癌物 ,被人體的肺部吸入后，致使肺內(nèi)部 環(huán)境 被破壞，隨著肺部粘液的增加，會(huì)出現(xiàn)哮喘，支氣管肺炎，慢性支氣管炎等疾病。中低檔汽車內(nèi)自帶的尾氣檢測(cè)裝置不夠先進(jìn)，不能在汽車內(nèi)隨時(shí)顯示汽車尾氣中有害氣體的濃度 ，也不能夠及時(shí) 提醒駕駛 員 去 特定 部門維修汽車。由液晶 屏 顯示當(dāng)前檢測(cè)值的濃度，這樣檢測(cè)裝置實(shí)時(shí)性的特點(diǎn) 就顯現(xiàn)出來。 傳感器檢測(cè)模塊：采用 MQ2 氣體傳感器檢測(cè)以 CO 為主的有害汽車尾氣 ，用GP2Y1050AU0F 粉塵傳感器檢測(cè)排放尾氣中 固體顆粒物。它對(duì)檢測(cè)場(chǎng)所的溫度也有要求，在 10攝氏度到 50 攝氏度之間均可以正常使用，對(duì)檢測(cè)場(chǎng)所的溫度有要求是因?yàn)槠鋬?nèi)部有可以進(jìn)行調(diào)節(jié)的負(fù)載電阻，正常工作溫度下，此傳感器內(nèi)加熱電阻阻值在 31Ω左右，其內(nèi)部加熱電阻功耗小于等于 900mW，它內(nèi)部回路標(biāo)準(zhǔn)工作電壓（ AC 或 DC）在小于等于 15V 范圍內(nèi) ,其內(nèi)部加熱電壓（ AC或 DC）在 177。 MQ2 模塊與單片機(jī)接線設(shè)計(jì)如圖 34 所示 圖 34 MQ2模塊與單片機(jī)接線圖 天津天獅學(xué)院 2020 屆本科生畢