本文選題：PH + 嵌入式系統(tǒng)��； 參考：《南京郵電大學》2013年碩士論文

【摘要】：在工業(yè)生產過程中，工廠排出的化學廢液中含有許多有用的離子，，如果直接排放掉，不僅會造成資源浪費，甚至會污染環(huán)境。離子的回收對溶液酸堿度有一定要求。因此，如果研究設計出一種能夠測量出水溶液酸堿濃度的測試儀，顯然具有較大理論意義和實用價值。 本文根據實際應用的需求，基于嵌入式技術、離子選擇性電極和稀釋測量法，研究并設計出一種具有低功耗、操作便捷的嵌入式PH值和高于PH值的堿百分比濃度測試分析儀。該分析儀不僅能測量0~14范圍的PH值，而且能測量出PH值高于14的堿百分比濃度。 本文首先研究了離子選擇性電極測量法和稀釋測量方法，同時分析了溫度對測量結果的影響；然后結合測試儀實際工作流程，以處理器LPC2214作為主控芯片，設計出本文的硬件系統(tǒng)，包括信號處理電路、A/D轉換電路、觸摸屏電路、串口通信電路、D/A，換電路、報警電路、液體進樣電路、光電檢測電路等；最后，在硬件系統(tǒng)的基礎上，采用模塊化的軟件設計方法，開發(fā)出相應的軟件系統(tǒng)，包括A/D采集軟件模塊、D/A輸出軟件模塊、觸摸屏控制軟件模塊、數據處理軟件模塊等。 經測試儀的軟硬件整體調試和使用，表明測試分析儀工作穩(wěn)定、人機交互良好，操作方便；通過對實際水溶液的測試與數據分析可知，測量準確度能夠達到課題設計要求。
[Abstract]:In the process of industrial production, the chemical waste liquid discharged from the factory contains many useful ions. If it is discharged directly, it will not only cause waste of resources, but also pollute the environment. The recovery of ions requires the pH of the solution. Therefore, it is of great theoretical significance and practical value to design a measuring instrument which can measure the concentration of acid and base in aqueous solution. According to the requirement of practical application, based on embedded technology, ion selective electrode and dilution measurement method, a kind of embedded pH and alkali percentage concentration analyzer with low power consumption and convenient operation is studied and designed. The analyzer can not only measure the PH value in the range of 0 ~ 14, but also measure the percentage concentration of alkaloids with PH value higher than 14. In this paper, the ion-selective electrode measurement method and dilution measurement method are studied, and the influence of temperature on the measurement results is analyzed, and then the processor LPC2214 is used as the main control chip combined with the actual work flow of the tester. The hardware system of this paper is designed, including signal processing circuit, touch screen circuit, serial communication circuit, switch circuit, alarm circuit, liquid injection circuit, photoelectric detection circuit, etc. Finally, on the basis of the hardware system, Using the modular software design method, the corresponding software system is developed, including the A / D acquisition software module, the touch screen control software module, the data processing software module and so on. Through the whole debugging and using of the software and hardware of the tester, it is shown that the test analyzer works stably, the man-machine interaction is good, and the operation is convenient. Through the testing and data analysis of the actual aqueous solution, it can be known that the measuring accuracy can reach the design requirements of the project.
【學位授予單位】：南京郵電大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TQ056.1;TP368.1

【參考文獻】

相關期刊論文 前10條

1 何立民;嵌入式系統(tǒng)的定義與發(fā)展歷史[J];單片機與嵌入式系統(tǒng)應用;2004年01期

2 姜U

本文編號：1813419