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研究生:姚凱文
研究生(外文):Kai-Wen Yao
論文名稱:人工電子眼中無線傳輸端評估與設計
論文名稱(外文):Evaluation and Design of the Wireless Transmitter in Artificial Eye
指導教授:張寅張寅引用關係
指導教授(外文):Yin Chang
學位類別:碩士
校院名稱:國立陽明大學
系所名稱:醫學工程研究所
學門:工程學門
學類:生醫工程學類
論文種類:學術論文
論文出版年:2006
畢業學年度:94
語文別:中文
論文頁數:51
中文關鍵詞:E類功率放大器視網膜晶片假體
外文關鍵詞:class-E power amplifierretinal chipphantom
相關次數:
  • 被引用被引用:1
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  • 收藏至我的研究室書目清單書目收藏:2
人透過雙眼來觀看世界上美好的景物,但眼睛的疾病卻往往困擾著我們。色素性視網膜炎與老年黃斑部退化為現今最常見的視網膜疾病。人工電子眼便是一種可望恢復因感光細胞壞死而導致失明之視盲患者部份視力的方法。其中,無線傳輸端更是決定整個電子眼系統穩定度最關鍵的一環。
在人工電子眼系統中,將外部影像訊號傳入眼內的方式可分為有線和無線兩種傳輸方式。傳統有線傳輸方式的系統較為簡單、穩定度高,不過會有感染的風險存在。使用無線傳輸的方式便不怕被感染,但衍生而來的便是系統複雜度、通道編碼複雜度與正確性、頻段與系統功率之限制及其所長時間接收電磁波而產生的生物熱效應等問題。
本研究是使用E類功率放大器與線圈作為發射器,並配合已知視網膜晶片參數,製作接收端電路,再針對仿眼球假體的進行製作。最後量測眼球假體內整體溫度的改變並評估不同距離所造成電磁能量衰減與溫度改變的情況,以便日後相關研究設計的考量。
People see the scenery over the world through their eyes, however, many eye diseases would congenitally or gradually affect the vision. Today RP and AMD are two of the most common diseases for retina. Artificial eye is a way to restore some sight for the blind people in whom the photoreceptors have already degenerated. Wireless transmitter is the most important part which can decide the stability in the whole system.
Kinds of ways to transmit image signals from external unit in artificial eye are the wire type and the wireless type. Traditional transmission systems connected by wires are easier to design and have higher stability, but they have danger of infection. Contrary, the wireless way will not be infected but cause some problems in systematic complexity, complexity and correctness of channel coding, limitation of frequency band and systematic power, and bioheat effect from long-term receiving electromagnetic wave.
In this study we used a class-E power amplifier and coil to transmit energy and data. Then we designed received circuits and fabricated the phantom of an eye based on parameters of the retinal chip.
The temperature change was measured in the phantom and evaluated for the conditions of energy attenuation and temperature variation in different distances. And finally, we got a new design consideration for future studies.
中文摘要...................................................i
英文摘要..................................................ii
目錄.....................................................iii
圖索引.....................................................v
表索引...................................................vii

第一章、緒論...............................................1
1-1、研究背景與動機........................................1
1-2、研究目的..............................................1
第二章、原理...............................................3
2-1、視覺機制..............................................3
2-1-1、生理構造............................................3
2-1-2、動作電位............................................4
2-2、喪失視覺原因..........................................5
2-2-1、色素性視網膜炎......................................5
2-2-2、老年性黃斑部退化....................................6
2-3、視網膜晶片刺激原理....................................7
2-3-1、下視網膜刺激........................................7
2-3-2、上視網膜刺激........................................7
2-3-3、三明治型電刺激......................................8
2-4、人工電子眼架構........................................9
2-5、植入式無線傳輸系統...................................11
2-5-1、ASK調變解調原理....................................12
2-5-2、E類功率放大器......................................13
2-5-3、線圈感應...........................................15
2-6、生物效應.............................................16
第三章、研究方法..........................................18
3-1、研究流程.............................................18
3-2、傳輸電路設計.........................................19
3-2-1、ASK解調電路........................................20
3-2-2、時脈產生電路.......................................21
3-2-3、整流濾波電路.......................................21
3-2-4、低壓降線性穩壓電路.................................22
3-3、溫度感測.............................................24
3-3-1、假體設計...........................................25
3-3-2、溫度控制系統.......................................26
3-3-3、訊號擷取電路.......................................27
第四章、結果..............................................28
4-1、傳輸電路量測結果.....................................28
4-2、接收端電路模擬結果...................................31
4-3、溫度校正.............................................34
4-4、訊號擷取.............................................36
4-5、假體溫度變化量測.....................................37
4-6、電場量測.............................................40
第五章、討論..............................................44
第六章、結論..............................................47
參考文獻 ................................................ 48
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