【摘要】：氯氣消毒法具有很高的性價比,被我國大部分自來水廠用于消毒處理,出廠水余氯(free chlorine)含量的指標(biāo)反映出了自來水水質(zhì)的好壞。隨著生活水平的提高,飲用水中的余氯檢測越來越受到人們的重視,余氯的檢測對于嚴(yán)格控制水質(zhì)質(zhì)量,保證用水安全具有十分重要的實用價值。本文介紹了余氯檢測的研究背景,飲用水的處理工藝技術(shù)和國內(nèi)外研究現(xiàn)狀及發(fā)展趨勢,利用化學(xué)傳感技術(shù)和嵌入式技術(shù)結(jié)合的方法實現(xiàn)了三電極余氯檢測的技術(shù)研究,并以此為出發(fā)點開發(fā)出高性能的余氯檢測系統(tǒng)。文中重點介紹了三電極余氯傳感器的研制過程和系統(tǒng)的軟硬件設(shè)計方案,并對檢測系統(tǒng)完成了標(biāo)定與測試。本文首先,闡述了三電極余氯傳感器的檢測原理;其次,詳細(xì)給出了檢測系統(tǒng)的硬件設(shè)計,包括了余氯傳感器的制作方案和檢測電路的設(shè)計方法,分別對余氯傳感器的電極材料的選擇、腔體結(jié)構(gòu)的設(shè)計以及制作過程進(jìn)行了詳細(xì)說明,并給出了余氯檢測系統(tǒng)的PCB和樣機；再次,設(shè)計了余氯檢測的系統(tǒng)架構(gòu),在此基礎(chǔ)上分析了嵌入式實時操作系統(tǒng)RT-Thread的文件體系結(jié)構(gòu),并根據(jù)實時操作系統(tǒng)運行原理說明了余氯檢測、溫度采集、pH測量任務(wù)以及檢測系統(tǒng)標(biāo)定程序的設(shè)計流程。最后介紹了余氯檢測系統(tǒng)的標(biāo)定實驗,分析了標(biāo)定結(jié)果,同時對余氯檢測系統(tǒng)進(jìn)行了測試。經(jīng)過實驗驗證,具有穩(wěn)定性好,精度高等優(yōu)點,可用于日常飲用水、發(fā)電廠鍋爐給水和廢水處理中的余氯濃度檢測。
[Abstract]:Chlorine disinfection method has a high performance-price ratio and is used for disinfection treatment in most waterworks in China. The index of residual chlorine (free chlorine) content in factory water reflects the quality of tap water quality. With the improvement of living standard, people pay more and more attention to the detection of residual chlorine in drinking water. The detection of residual chlorine is of great practical value for strictly controlling the quality of water quality and ensuring the safety of water. This paper introduces the research background of residual chlorine detection, the treatment technology of drinking water, the research status and development trend at home and abroad, and realizes the technical research of residual chlorine detection with chemical sensing technology and embedded technology. Based on this, a high performance residual chlorine detection system is developed. In this paper, the development process of the three-electrode residual chlorine sensor and the software and hardware design scheme of the system are introduced, and the calibration and test of the detection system are completed. In this paper, the detection principle of the three-electrode residual chlorine sensor is described. Secondly, the hardware design of the detection system is given in detail, including the fabrication scheme of the residual chlorine sensor and the design method of the detection circuit. The selection of electrode material for residual chlorine sensor, the design of cavity structure and the fabrication process are described in detail, and the PCB and prototype of residual chlorine detection system are given. Thirdly, the system architecture of residual chlorine detection is designed. On this basis, the file architecture of embedded real-time operating system (RT-Thread) is analyzed, and the design flow of residual chlorine detection, temperature acquisition and pH measurement and calibration program is explained according to the principle of real-time operating system. Finally, the calibration experiment of residual chlorine detection system is introduced, the calibration results are analyzed, and the residual chlorine detection system is tested. It is proved by experiments that it has the advantages of good stability and high precision. It can be used to detect the residual chlorine concentration in daily drinking water, boiler feedwater and wastewater treatment in power plant.
【學(xué)位授予單位】：北京化工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X832;TP212

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本文編號：2241845