本文關(guān)鍵詞： 火花探測 PIN硅光電二極管 DSP Modbus 觸摸屏　出處：《東北大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：除塵器中的粉塵爆炸防護(hù)一直是國內(nèi)外粉塵防爆領(lǐng)域重點(diǎn)研究的對象之一。引起除塵器中火災(zāi)和爆炸的因素有很多,其中一個很重要的因素就是由于火花通過除塵管道進(jìn)入除塵器中,若不進(jìn)行探測就可能會下被粉塵覆蓋,在密閉的除塵器中很容易滿足粉塵爆炸的條件從而引發(fā)火災(zāi)甚至爆炸。因此,設(shè)計(jì)針對除塵管道的火花探測與報(bào)警系統(tǒng),在火災(zāi)的初期將火花熄滅是當(dāng)前工業(yè)領(lǐng)域需要迫切解決的實(shí)際問題。本課題針對除塵管道的特點(diǎn),深入研究國外各種火花傳感器,設(shè)計(jì)了一套完整的火花探測與報(bào)警系統(tǒng)。本課題首先建立起了管道內(nèi)火花探測的數(shù)學(xué)模型,用MATLAB分析量化了影響火花探測輻照度的各種因素。完成了基于PIN硅光電二極管的放大電路設(shè)計(jì),實(shí)現(xiàn)了光電轉(zhuǎn)換和電壓脈沖轉(zhuǎn)換為核心思想的傳感器設(shè)計(jì)。設(shè)計(jì)了基于TMS320F2812的下位機(jī)系統(tǒng)控制電路,可以將傳感器信號進(jìn)行有效采集和處理,在檢測到有效的火花時(shí)可以進(jìn)行聲光報(bào)警。設(shè)計(jì)實(shí)現(xiàn)了下位機(jī)與上位機(jī)進(jìn)行通信的接口電路并為后續(xù)的熄滅系統(tǒng)開發(fā)預(yù)留了接口電路。在CCS3.3下開發(fā)完成了傳感器信號的采集處理程序。完成了基于Modbus的TMS320F2812與MCGS觸摸屏驅(qū)動程序開發(fā),可以有效實(shí)現(xiàn)觸摸屏發(fā)送幀的接收、解析和應(yīng)答。設(shè)計(jì)了基于MCGS嵌入版觸摸屏的上位機(jī)軟件系統(tǒng),可以實(shí)現(xiàn)與下位機(jī)DSP系統(tǒng)的實(shí)時(shí)通信。通過對觸摸屏的操作可以實(shí)時(shí)監(jiān)控下位機(jī)的報(bào)警信息和系統(tǒng)信息。具有不同的管理權(quán)限可以實(shí)現(xiàn)分權(quán)限火花探測與報(bào)警系統(tǒng)操作。設(shè)計(jì)了模擬除塵管道火花產(chǎn)生和運(yùn)動的實(shí)驗(yàn)平臺,可基于此平臺進(jìn)行了火花探測與報(bào)警系統(tǒng)的實(shí)驗(yàn)驗(yàn)證。
[Abstract]:Dust explosion protection in dust precipitator has been one of the important research objects in the field of dust explosion protection at home and abroad. There are many factors that cause fire and explosion in dust collector. One of the most important factors is the fact that sparks enter the dust collector through the dust removal pipe and can be covered by dust if not detected. It is very easy to meet the condition of dust explosion in a closed dust collector, which can lead to fire or even explosion. Therefore, a spark detection and alarm system is designed for the dust collection pipeline. Extinguishing sparks in the early stage of fire is a practical problem that needs to be solved urgently in the field of industry at present. In view of the characteristics of dust removal pipeline, this paper deeply studies all kinds of spark sensors in foreign countries. A complete spark detection and alarm system is designed. Firstly, the mathematical model of the pipeline spark detection is established. The various factors affecting the irradiance of spark detection are quantified by MATLAB analysis, and the amplifier circuit based on PIN silicon photodiode is designed. The sensor design of photoelectric conversion and voltage pulse conversion is realized, and the control circuit of lower computer system based on TMS320F2812 is designed. The sensor signal can be collected and processed effectively. Acousto-optic alarm can be used when detecting effective spark. The interface circuit of communication between lower computer and upper computer is designed and realized, and the interface circuit is reserved for the subsequent development of extinguishing system. The interface circuit is developed under CCS3.3. It is the acquisition and processing program of sensor signal, and the development of TMS320F2812 and MCGS touch screen driver based on Modbus is completed. It can effectively realize the receiving, parsing and answering of the sending frame of the touch screen. The software system of the host computer based on the MCGS embedded touch screen is designed. Through the operation of touch screen, the alarm information and system information of the lower computer can be monitored in real time. Operation of alarm system. An experimental platform is designed to simulate the generation and movement of dust removal pipeline spark. The experimental verification of spark detection and alarm system based on this platform is carried out.
【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：X932

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本文編號：1469367