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研究生:泰清秀
研究生(外文):Thanh-Tu Thai
論文名稱:基於光電體積變化偵測元件於穿戴式裝置實現低功耗心率變異度量測
論文名稱(外文):Wearable and Low-Power Design for Measuring HRV using SpO2 Sensor
指導教授:宋啟嘉
學位類別:碩士
校院名稱:國立虎尾科技大學
系所名稱:光電與材料科技研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2015
畢業學年度:103
語文別:英文
論文頁數:41
中文關鍵詞:低功耗處理器血氧濃度心率變異心率變異度分析
外文關鍵詞:low-power MCUblood oxygenportable heart rateHRV
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本論文是基於光電體積變化偵測元件(PPG)用來量測心率變異度,它是一個非侵入性在手指上測量血體積變化的方法,使用一個光源跟一個檢測器的原理。心率變異度是一種很重要的數據以表示自律神經系統的狀態;它可以用來診斷病人的狀況或是使用者的平衡度。經由處理器裡面的整合周圍類比模組獎光電體積變化的類比訊號放大後轉換成數位訊號。後端,算出來的結果可透過藍牙4.0或是UART傳遞到電腦。本論文也有運用Berger 方法來偵測跟追蹤R-R間隔,有研發一個在低階的處理器來運算傅利葉演算法。在低功耗方面利用一個基於睡眠模式來進行省電;睡眠模式是根據一些條件來讓中央處理器輪流跑和停止,這樣可以讓它在不必要的時間進行運作。這是一種在醫院監控病人的醫療儀器和提供醫生於分析病人狀況透過他們的心跳和心率變異度。該計劃使用裡面有整合類比周圍模組的低功耗的處理器來運算,所以縮小整體面積和複雜度,以及降低成本。

This thesis is based on the principle of photoplethysmography (PPG) to trace for the Heart Rate Variability figure in people body which is a non-invasive method of measuring the variation in blood volume in tissues using a light source and a detector. The HRV is an important figure to indicate the working situation of the Autonomic Nervous System; hereby it is able to diagnose the patient status or normal user’s health balance. The PPG signal is amplified and converted to digital by the integrated analog peripheral in the micro-controller. Afterward, sending results to computer through the Bluetooth 4.0 wireless communication or UART. The thesis also applied the Berger method to detect and track for the R-R interval. The method of calculating Fast Fourier Transform with low-resource micro-controller is also developed within this project. The thesis also include a basic power saving algorithm to reduce the battery power, the algorithm based on the sleeping mode of the CPU and depend on some conditions of waking-up. This is a medical instrument for monitoring the patient in the hospital and supports the doctors in analyzing their situation through HBR, HRV. The thesis takes advantage of using low-cost micro-controller with integrated analog peripherals to reduce the circuit complexity as well as price.

English Abstract...........................................i
Chinese Abstract..........................................ii
Acknowledgements.........................................iii
Contents..................................................iv
List of Tables.............................................v
List of Figures...........................................vi
Chapter 1 Introduction...............................1
1.1 Research Motivations...............................1
1.2 Background.........................................3
Chapter 2 Heart Rate Variability.....................6
2.1 PPG and ECG Comparison.............................6
2.2 R-R Interval.......................................9
2.3 Heart Rate Variability............................10
2.4 HRV Applications..................................11
Chapter 3 System Architecture.......................12
3.1 System Hardware...................................12
3.2 System Design.....................................15
3.3 Fast Fourier Transform............................25
Chapter 4 Experiment Results........................27
4.1 HBR Comparison....................................27
4.2 HRV Comparison....................................29
Chapter 5 Conclusion and Future Works...............31
References................................................32
Appendix I................................................35
Appendix II...............................................40
Curriculum Vitae..........................................41


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