【正文】 畢業(yè)生畢業(yè)論文 題 目 : 基于無(wú)線傳輸?shù)耐咚節(jié)舛葯z測(cè)儀設(shè)計(jì) I 摘要 在我國(guó)，煤炭行業(yè)中的瓦斯爆炸事故始終是煤礦安全生產(chǎn)的大敵，目前己成為制約煤礦安全生產(chǎn)的主要因素。因此，實(shí)時(shí)檢測(cè)瓦斯氣體的濃度變化，對(duì)礦井安全運(yùn)行，人身安全及環(huán)境保護(hù)有著十分重要的作用。而目前國(guó)內(nèi)礦井中用于瓦斯檢測(cè)的設(shè)備比較落后，這些設(shè)備探測(cè)范圍小，反應(yīng)時(shí)間長(zhǎng)，數(shù)據(jù)傳輸采用有線方式，且具有成本高、功耗高和設(shè)備龐大等特點(diǎn)，不適應(yīng)大多數(shù)煤礦的需求，因此需要研制一種集成化、智能化、小型化、無(wú)線化的新型瓦斯檢測(cè)報(bào)警 設(shè)備，增強(qiáng)礦井的安全監(jiān)測(cè)能力。 本論文將 無(wú)線傳輸技術(shù)引入礦井瓦斯監(jiān)測(cè)數(shù)據(jù)傳輸過(guò)程中，從而 設(shè)計(jì)了一種基于無(wú)線傳輸?shù)耐咚節(jié)舛葯z測(cè)儀。 使其實(shí)現(xiàn)即走即測(cè)、即測(cè)即發(fā)的功能 ,論文研究成果為礦井安全監(jiān)測(cè)提供了一套切實(shí)可行的新的解決方案。 該瓦斯?jié)舛葯z測(cè)儀分為現(xiàn)場(chǎng)部分和手持部分兩部分，現(xiàn)場(chǎng)部分是處于瓦斯檢測(cè)點(diǎn)的部分，這部分主要由瓦斯傳感器、信號(hào)調(diào)理、 A/D轉(zhuǎn)換器、單片機(jī)、無(wú)線發(fā)射模塊 PTR20xx組成。而手持部分主要由無(wú)線接收模塊 PTR20xx、單片機(jī)、顯示單元、報(bào)警單元等組成。硬件部分主要對(duì)如何應(yīng)用低功耗的 AT89C51單片機(jī)來(lái)完成數(shù)據(jù)的采集、處理判斷、數(shù)據(jù)的顯示和傳輸?shù)纫幌盗泄δ茏髁酥攸c(diǎn)地分析和闡述。而軟件部分則對(duì)各部分的程序流程作了詳細(xì)說(shuō)明。 關(guān)鍵詞 ：瓦斯?jié)舛?； 無(wú)線傳輸 ； 檢測(cè)儀 ； AT89C51 II Title Design of Gas Concentration Detector Based on the Wireless Transmission Technology Abstract In China, the gas explosion accident has always been the greatest problem in the coal industry. At present, it even has bee the main factor constraining the safe producing of the coal. Therefore, the realtime detection of the change of gas concentration plays a very important role on the safe operation of mining, personal safety and environmental protection. But in current, domestic detection equipment hung behind the other counties. The detected scopes of these equipments are small, the reaction times are long, and using wire transmission approach in data transmission, these equipment do not meet the needs of majority of coal mines because of the high cost and high power needs and large volumes. It was necessary to develop an integrated, intelligent, small and the new wireless gas detection and alarm equipment. This equipment can enhance the mine safety monitoring capabilities. This paper introduced the wireless data transmission technology in mine environmental monitoring data transmission process. Thus, a gas concentration detector is designed which based on the wireless transmission technology. So it can moving then detecting and detecting then transmission. This paper’s research findings provided a new feasible solution scheme of mine safety. The detector posed of two parts, the scene part and the handheld part. The scene part is at the gas detection point, the main ponents of it are gas sensor, signal conditioning circuit, A/D converter, MCU and Wireless transmitter module PTR20xx. While the handheld part mainly consists of wireless receiver module PTR20xx, MCU, displaying unit, alarming unit and so on. In the hardware design, this paper analyses and elaborates how to plete the data acquisition, processing judgments, display and transmission of data, such as a series of function across the lowpower AT89C51 MCU. While in the part of software, the paper described the III program flow in detail. Key Words Gas concentration； Wireless transmission； Detector； AT89C51 IV 目 次 1 緒論 ............................................................................................................................ 1 煤礦瓦斯氣體概述 ................................................................................................. 1 國(guó)家關(guān)于煤礦安全濃度的規(guī)定 ............................................................................. 2 無(wú)線傳輸技術(shù)概述 ................................................................................................. 3 煤礦瓦斯檢測(cè)儀的發(fā)展?fàn)顩r ................................................................................. 4 本課題的研究意義 ................................................................................................. 5 本課題的主要工作內(nèi)容 ......................................................................................... 5 2 系統(tǒng)總體方案設(shè)計(jì) .................................................................................................... 7 系統(tǒng)總體構(gòu)成及工作原理 ..................................................................................... 7 系統(tǒng)設(shè)計(jì)要求 ......................................................................................................... 8 系統(tǒng)設(shè)計(jì)原理 ......................................................................................................... 9 3 系統(tǒng)硬件設(shè)計(jì) .......................................................................................................... 15 系統(tǒng)電源設(shè)計(jì) ....................................................................................................... 15 數(shù)據(jù)采集與信號(hào)調(diào)理電路部分設(shè)計(jì) ................................................................... 16 模數(shù)轉(zhuǎn)換芯片 AD574A 原理及連接方法 .......................................................... 17 無(wú)線傳輸模塊 PTR20xx 原理及應(yīng)用 ................................................................. 20 LED 顯示電路設(shè)計(jì) ............................................................................................... 21 報(bào)警電路 ............................................................................................................... 22 電池電量監(jiān)測(cè)電路設(shè)計(jì) ....................................................................................... 23 4 系統(tǒng)軟件設(shè)計(jì) .......................................................................................................... 25 現(xiàn)場(chǎng)單片機(jī)主程序設(shè)計(jì) ....................................................................................... 25 手持部分單片機(jī)主程序設(shè)計(jì) ............................................................................... 25 串行口子程序設(shè)計(jì) ............................................................................................... 26 傳感器控制程序設(shè)計(jì) ........................................................................................... 27 結(jié) 論 .......................................................................................................................... 29 致 謝 .......................................................................................................................... 30 參考文獻(xiàn) ........................................