無氣囊陣列式光學血壓感測器控制系統

Cuffless Non-invasive Blood Pressure Optical Sensor with array of LED/PD control by FPGA

洪越(Hong, Yue)

指導教授 ： 趙昌博

國立交通大學/電機學院/電機工程系所/碩士(2020年)

摘要

本論文設計一陣列式血壓感測器用於病患隨身測量血壓，以發光二極體發光打入皮膚後經過橈動脈再由光電二極體接收，以光體積描述法以測量血液流量變化計算血壓值。本儀器使用四個感測器截取四個不同訊號，再由FPGA選出最良訊號進入分析，感測器所截取道的訊號會先經過前端電路的電流電壓轉換器、帶通濾波器、可編程增益放大器隨後進入FPGA選擇適合的訊號傳入電腦運算血壓值，傳入電腦的媒介我以ARDUINO傳輸。另外以FPGA控制LED驅動電路控制光強度，帶通濾波器之頻帶範圍為0.3Hz~7.2Hz，可編程增益放大器有8個不同放大倍率可選擇，血壓感測器量測結果將與氣囊式血壓計OMRON HEM-7310做比較。

關鍵字

光體積描述法 ； 帶通濾波器 ； 可編程增益放大器 ； LED驅動電路

並列摘要

This thesis developed an optical PPG sensor device for measuring blood pressure. The device use four LED emit light into human skin then pass through the radial artery, and the photodiode receive the light come out from the skin. The device use photoplethysmography (PPG) to detect blood volume and calculate blood pressure. The signal come from the sensor will input the readout circuit include TIA, band pass filter, PGA then output four analog signal for ADC in FPGA. The FPGA will collect the suitable signal and transport into computer by ARDUINO. FPGA can also control the LED light intensity, and the bandwidth range of band pass filter is 0.3Hz ~ 7.2Hz, and the PGA used in this device have eight magnification to adjust. Measure result will compare with the cuff blood presure monitor by OMRON HEM-7310

並列關鍵字

photoelectric plethysmography (PPG) ； band-pass filter ； programmable gain amplifier (PGA) ； LED driver ； radial artery

參考文獻

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