嵌入式系統技術應用於可攜式多重離子感測系統之研究

Study on a portable multi-ions sensing system based on an embedded system technology

楊俊秋(Gin-Chou Yang)

指導教授 ： 熊慎幹

中原大學/工學院/電子工程研究所/碩士(2006年)

https://doi.org/10.6840/CYCU.2006.00432

摘要

快速參數檢測分析方法與系統於醫學及環境領域愈來愈受到重視，簡易操作之可攜式檢測裝置更逐漸取代複雜的分析系統與儀器，若進一步結合可拋棄式之感測器，則可降低系統製作成本與增加即時檢測之彈性。

本論文係以射頻濺鍍法研製電壓式固態二氧化錫酸鹼感測器之架構為基礎，結合鉀、鈉及氯等高分子離子選擇薄膜，完成具備檢測酸鹼、鉀、鈉及氯離子等多重離子感測器之研製。多重離子感測器訊號擷取電路設計係依據各離子感測器之特性與規格，設計第ㄧ級訊號擷取電路、高通濾波器、增益級放大器、準位調整電路與低通濾波器等前端類比讀出電路，並進行感測器類比訊號擷取及最佳化之處理。最後結合嵌入式系統技術，使用PIC微控制器進行感測訊號之類比/數位轉換及數位訊號處理，將溶液之感測結果 (即酸鹼、鉀、鈉及氯離子等參數)即時顯示於液晶顯示器，此外亦可藉由通用序列匯排流與通用非同步收發傳輸器等傳輸介面，將感測結果即時傳送至電腦端，完成可攜式多重離子感測系統之研製。

關鍵字

可攜式多重離子感測系統 ； PIC微控制器 ； 嵌入式系統技術 ； 多重離子感測器 ； 二氧化錫酸鹼感測器

並列摘要

A rapid determination of different analytically relevant parameters is developed in medical and environmental applications. A simple and easy-to-handle instrument replaces more complex analytical systems. The advantages of such portable instruments combined with the disposable sensors are the low cost and capability of real-time detection.

In this thesis, the disposable multi-ions sensors and the embedded system technology were applied to realize the portable multi-ions sensing system for the pH, pK, pNa and pCl detections. First, the SnO2 pH electrode was fabricated by the radio frequency (R.F.) sputtering method on the indium tin oxide (ITO)/glass substrate. As for the fabrications of the disposable multi-ions sensors based on the SnO2 pH electrode, the ion selective membranes were deposited on the SnO2 membrane-based pH sensor for the fabrication of the potassium ion selective electrode (ISE), the sodium ISE and the chlorine ISE. After combining with the embedded system technology, the portable multi-ions sensing system in this thesis consists of the disposable multi-ions sensors, front-ended analog readout circuits, PIC microcontroller, liquid crystal display (LCD) module, Universal Serial Bus (USB) module and RS232 module. Finally, the measurement results obtained from the disposable multi-ions sensors can be displayed on the LCD and transmitted to the computer with both USB and Universal Synchronous Asynchronous Receiver Transmitter (USART) interfaces. According to the experimental results, the portable multi-ions sensing system has the advantages of stable response voltages, fast response time, high detection resolution, battery-powered, displaying the results immediately on the LCD and transmitting the results to computer with the USB and RS232 transmission lines.

並列關鍵字

PIC microcontroller ； embedded system technology ； multi-ions sensors ； portable multi-ions sensing system ； SnO2 pH electrode

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