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研究生: 陳書群
Chen, Shu-Chun
論文名稱: 無線多通道電化學感測系統
Wireless Multi-Channel Electrochemical Signal Sensing System
指導教授: 羅錦興
Luo, Ching-Hsing
共同指導教授: 黃弘一
Huang, Hong-Yi
學位類別: 碩士
Master
系所名稱: 電機資訊學院 - 電機工程學系
Department of Electrical Engineering
論文出版年: 2010
畢業學年度: 98
語文別: 中文
論文頁數: 92
中文關鍵詞: 無線傳輸生醫感測居家照護數位濾波微控制器
外文關鍵詞: wireless, sensor, potentiostat, digital filter, MCU, microprocessor
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  • 隨著科技的發展,人們的生活品質得以改善,再加上醫療技術的進步,使得國民的平均年齡逐漸增加,本論文以可居家健康監控的看護系統做為目標,整合現今的生物感測技術及晶片技術,透過無線傳輸,配合嵌入式系統,完成整合型的無線多通道電化學生醫感測平台系統,方便使用者居家使用,並透過此無線平台,配合嵌入式系統,可將個人的健康資訊傳透過網路送到家人或醫療人員,減少來回醫院之時間及成本,可以讓專業的醫生充分了解使用者的身體狀況,並做長期追蹤。
    本系統之前端之類比多工器使用市售晶片提供4個通道,數位類比轉換電路也使用市售晶片完成,具備8位元的解析度,微控制器本論文使用Altera 公司出產的MAX||系列晶片完成中心微控制器。系統供應電壓為3.3V,而工作時脈由外部石英振盪給予50MHz之振盪頻率,前端每單一通道讀取頻率為24Hz,後端傳輸之UART波特率為1200bits/sec。系統中心微控制器使用有限狀態機完成輪循控制,並建立睡眠模式切換之機制用以節能,而整體發射端處於工作模式與處於睡眠模式時所相差之功耗可達70mW左右,此外,訊號處理單元以共用元件之概念完成可節省邏輯閘數,並且設計為可調式階數訊號處理,使處於不同環境下可調整為最佳階數以節省功耗及增加此系統之應用性。而此微控制器之功耗約為46mW。無線傳輸利用微控制器控制市售模組達到傳輸功能,資料傳送時最高約為20mW,包含讀取電路、數位類比轉換、微控制器、無線傳輸模組及所有燒錄電路之整體發射端工作時供號約為192.31mW,休眠時為118.23mW,而此系統發射端的面積為57mm*87mm,接收端包含模組為18mm*40mm。

    The development of technology improves people's quality of life and makes average age of people gradually increase. The target of this paper is to build a home health care system, which integrates bio-sensor technology and chip technology, through wireless transmission and back-end software systems to realize an integrated wireless multi-channel electrochemical biomedical sensor platform. This proposed system can not only be used easily at home but also transmits personal health information through the network to his family or medical staff. By this way, it can reduce turnaround time and cost, Morover, the doctors can monintor the patients’ health information continuously.
    System center microcontroller adopts the finite state machine to control function block sequentially and establish the sleep mode mechanism to save power consumption. The power consumption of sleep mode is less by 70mW than work mode. In addition, the digital signal process unit is implemented by using the construct of sharing components to reduce the number of logic gates. The orders of filter in this work can be adjusted in different environment for user to choose the order of the filiter to reduce power consumption and increase the applicability of this system. This paper adopts Altera's MAX | | Series programmable digital chip to complete the microcontroller center. The proposed system is supplied by the voltage of 3.3V. The working clock frequency is generated by external quartz oscillator, wihose operation frequency is 200kHz. The sample rate of each channel is 24Hz and the baud rate of the UART in the back-ebd transmission is 1200bits/sec. Finally, the board size of the transmitter is 57mm * 87 mm and the board size of the receiver which includes modules is 18mm * 40mm.

    摘要 I 誌謝 III 目錄 IV 圖目錄 VI 表目錄 X 第一章 序論 1 1.1 研究動機 1 1.2 論文架構 3 第二章 研究背景及文獻回顧 4 2.1 研究背景 4 2.2 生物感測器 5 2.3 尿液分析 6 2.4 數位訊號處理 6 2.5 無線傳輸技術發展 9 2.6 整合電路參考 10 第三章 初步雛型系統驗證 12 3.1 初步雛型架構簡介 12 3.2 微控制器C8051_F310簡介 12 3.3 初步前端電流式讀取電路簡介 14 3.4 初步前端電位式讀取電路簡介 14 3.5 無線傳輸模組IP-Link122X簡介 15 3.6 微控器動作原理及初步發射端電路整合 15 3.7 初步接收端電路整合 19 3.8 初步雛型整合 22 3.9 初步雛型驗證 24 第四章 微控制器( MCU )設計 27 4.1 微控制器( MCU )主要架構設計簡介 27 4.2 類比數位轉換器控制設計簡介 28 4.3 類比多工器控制設計簡介 33 4.4 移動平均濾波器 37 4.5 數位訊號處理單元設計簡介 40 4.6 UART轉換單元 47 4.7無線模組控制及模式選擇 52 4.8控制單元介紹 54 第五章 整合系統及驗證 58 5.1微控制器訊號流程模擬 58 5.2訊號處理單元模擬 61 5.3 微控制器電路合成 63 5.4 無線傳輸模組APC220-43簡介 66 5.5 前端讀取電路簡介 68 5.6 資料庫軟體介面 69 5.7 系統整合 71 5.8 系統實體量測 77 5.8.1微控制器電路實體量測 77 5.8.2整合後端軟體實體量測 83 5.8.3整合感測器量測 85 第六章 總結與未來研究方向 89 6.1 總結 89 6.2 未來研究方向 89 Reference 91

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