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  本文選題：激光誘導熒光光譜　切入點：DSP　出處：《安徽理工大學》2015年碩士論文　論文類型：學位論文

【摘要】：我國煤炭行業(yè)近幾十年來開采力度的加大,開采量的不斷增加,導致煤礦開采地區(qū)的地形結(jié)構(gòu)發(fā)生了較大變化,不同含水層發(fā)生了位移移動,造成部分地區(qū)發(fā)生了煤礦突水事故,給煤礦帶來了一系列嚴重的后果,煤礦礦井被淹沒摧毀,煤礦工人安全受到威脅。為了防范突水事故的發(fā)生,應該通過各類技術(shù)檢測含水層的地殼變化和不同地區(qū)水有沒有發(fā)生大量滲透,如果發(fā)生變化,根據(jù)采集回來的數(shù)據(jù)和數(shù)據(jù)庫進行對比分析,最終應該給出相應的結(jié)果和發(fā)出預警。隨著半導體技術(shù)和傳感器技術(shù)的高速發(fā)展,使得水質(zhì)的監(jiān)測技術(shù)的實現(xiàn)成為可能,本文提出了一種基于DSP的煤礦突水在線檢測系統(tǒng)的研究。 在本文中,主要介紹了煤礦發(fā)生突水事故的現(xiàn)實情況和分析其發(fā)生的主要原因,介紹了激光誘導熒光光譜的監(jiān)測技術(shù),以激光誘導熒光的技術(shù)為基礎(chǔ),設(shè)計了基于DSP的熒光光譜監(jiān)測子系統(tǒng),在硬件上采用405nm波長的激光器發(fā)出激光打在水樣上,激發(fā)的熒光由光電倍增管接收,再經(jīng)由信號處理電路處理和24位AD模數(shù)轉(zhuǎn)換電路采樣,通過485總線送到上位機。為了真正實現(xiàn)監(jiān)測水質(zhì)的動態(tài)變化,本文還設(shè)計了水質(zhì)的電導率監(jiān)測和PH監(jiān)測子系統(tǒng)設(shè)計,分析了電導率和PH值監(jiān)測的原理,對比了多種監(jiān)測方案,最終給出了系統(tǒng)的設(shè)計。在軟件上移植了UCOS_Ⅱ?qū)崟r操作系統(tǒng),實現(xiàn)了多任務(wù)系統(tǒng)的設(shè)計,方便了后期系統(tǒng)的維護與升級,在通訊協(xié)議上采用ModBus通訊協(xié)議,減小了系統(tǒng)通信的誤碼率,提高了系統(tǒng)的可靠性。 本文給出了基于DSP的煤礦突水在線檢測系統(tǒng)的具體設(shè)計方案,并搭建了系統(tǒng)進行了系統(tǒng)實驗測試,針對五種不同的水樣進行了采樣對比,測試結(jié)果表明,本文的研究取得了一定成果,開發(fā)出來的硬件采集系統(tǒng)滿足了課題的要求。
[Abstract]:In recent decades, with the increase of mining intensity and the increasing of mining quantity, the topographic structure of coal mining areas in China has changed greatly, and different aquifers have been shifted. In order to prevent the occurrence of water inrush accidents, a series of serious consequences have been brought to the coal mines. The coal mines have been submerged and destroyed, and the safety of coal miners has been threatened. All kinds of technologies should be used to detect the crustal changes of aquifers and whether there is a large amount of water permeation in different areas. If changes occur, they should be compared and analyzed based on the collected data and the database. With the rapid development of semiconductor technology and sensor technology, it is possible to realize water quality monitoring technology. In this paper, an on-line detection system of coal mine water inrush based on DSP is proposed. In this paper, the actual situation of water inrush accident in coal mine is introduced and the main reasons are analyzed. The monitoring technology of laser induced fluorescence spectrum is introduced, which is based on laser induced fluorescence technology. A fluorescence spectrum monitoring subsystem based on DSP is designed. In hardware, a laser with a wavelength of 405 nm is used to hit the water sample, and the excited fluorescence is received by a photomultiplier tube. Then the signal processing circuit and 24 bits AD A / D conversion circuit are sampled and sent to the upper computer via 485 bus. In order to truly realize the dynamic change of monitoring water quality, this paper also designs the electrical conductivity monitoring and PH monitoring subsystem of water quality. The principles of conductivity and PH monitoring are analyzed, and several monitoring schemes are compared. Finally, the design of the system is given. The UCOSII real-time operating system is transplanted on the software, and the design of the multitask system is realized. It is convenient to maintain and upgrade the system in the later period. The ModBus communication protocol is adopted in the communication protocol, which reduces the bit error rate of the system communication and improves the reliability of the system. In this paper, the specific design scheme of the on-line detection system of coal mine water inrush based on DSP is given, and the system is set up to carry out the systematic experiment test, and the sampling and comparison of five different water samples are carried out. The test results show that, Some achievements have been made in this paper, and the developed hardware acquisition system meets the requirements of the subject.
【學位授予單位】：安徽理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD745;TP274

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