This application report discusses the design of non-invasive optical plethysmography also called as pulsoximeter using the MSP430FG437 Microcontroller (MCU). The pulsoximeter consists of a peripheral probe combined with the MCU displaying the oxygen saturation and Pulse rate on a LCD glass. The same sensor is used for both heart-rate detection and pulsoximetering in this application. The probe is placed on a peripheral point of the body such as a finger tip, ear lobe or the nose. The probe includes two light emitting diodes (LEDs), one in the visible red spectrum (660nm) and the other in the infrared spectrum (940nm). The percentage of oxygen in the body is worked by measuring the intensity from each frequency of light after it transmits through the body and then calculating the ratio between these two intensities.
標簽: plethysmography non-invasive application discusses
上傳時間: 2014-01-17
上傳用戶:天誠24
gmsk modulation of numerical data generated by a random source, the output of the modulator give two signals, the first is gmsk signal and the other is gaussien frequency Pulse shape
標簽: modulation generated numerical modulator
上傳時間: 2014-01-19
上傳用戶:dongbaobao
Matlab code for simulation of radar received power versus range. There are other files for additional features like aperture area, swirling objects and Pulse integration Happy learning!
標簽: simulation additiona for received
上傳時間: 2017-08-12
上傳用戶:helmos
The function applies the Madsen method for Doppler Centroid estimation. The input are: 1) the raw data, the parameter of the distance between samples in azimuth to be correlated and the PRF (Pulse repetition frequency)
標簽: estimation The the Centroid
上傳時間: 2017-08-12
上傳用戶:pinksun9
linux下通訊軟件skype的源碼安裝包,用gunzip解壓后即可使用。若不出聲,需選擇選項—聲音設置中的Pulse驅動
上傳時間: 2017-08-24
上傳用戶:123啊
AM26C31CLow Power, I CC = 100 ƒ ⊂ A Typ Operate From a Single 5-V Supply High Speed, t PLH = t PHL = 7 ns Typ Low Pulse Distortion, t sk(p) = 0.5 ns Typ High Output Impedance in Power-Off Conditions Improved Replacement for AM26LS31
標簽: Operate Single Supply Power
上傳時間: 2014-01-20
上傳用戶:gtzj
Most satellite dish actuators send a series of Pulses to indicate their position. By counting Pulses the positioner knows where the dish is pointing. It is possible to use a serial port and Linux with RTAI patches in order to count these Pulses, thus minimising the external hardware required for a positioner. The zip contains instructions, circuit diagrams and example code.
標簽: satellite actuators counting indicate
上傳時間: 2014-12-03
上傳用戶:netwolf
空間矢量脈寬調制(Space Vector Pulse Width Modulation) SVPWM的主要思想是:以三相對稱正弦波電壓供電時三相對稱電動機定子理想磁鏈圓為參考標準,以三相逆變器不同開關模式作適當的切換,從而形成PWM波,以所形成的實際磁鏈矢量來追蹤其準確磁鏈圓。傳統的SPWM方法從電源的角度出發,以生成一個可調頻調壓的正弦波電源,而SVPWM方法將逆變系統和異步電機看作一個整體來考慮,模型比較簡單,也便于微處理器的實時控制。 普通的三相全橋是由六個開關器件構成的三個半橋。這六個開關器件組合起來(同一個橋臂的上下半橋的信號相反)共有8種安全的開關狀態. 其中000、111(這里是表示三個上橋臂的開關狀態)這兩種開關狀態在電機驅動中都不會產生有效的電流。因此稱其為零矢量。另外6種開關狀態分別是六個有效矢量。它們將360度的電壓空間分為60度一個扇區,共六個扇區,利用這六個基本有效矢量和兩個零量,可以合成360度內的任何矢量。 當要合成某一矢量時先將這一矢量分解到離它最近的兩個基本矢量,而后用這兩個基本矢量矢量去表示,而每個基本矢量的作用大小就利用作用時間長短去代表。 在變頻電機驅動時,矢量方向是連續變化的,因此我們需要不斷的計算矢量作用時間。為了計算機處理的方便,在合成時一般是定時去計算(如每0.1ms計算一次)。這樣我們只要算出在0.1ms內兩個基本矢量作用的時間就可以了。由于計算出的兩個時間的總合可能并不是0.1ms(比這小),而那剩下的時間就按情況插入合適零矢量。 由于在這樣的處量時,合成的驅動波形和PWM很類似。因此我們還叫它PWM,又因這種PWM是基于電壓空間矢量去合成的,所以就叫它SVPWM了。
上傳時間: 2016-04-25
上傳用戶:bijiaohao22
BUCKBOOST電路原理分析uck變換器:也稱降壓式變換器,是一種輸出電壓小于輸入電壓的單管不隔離直流變換器。 圖中,Q為開關管,其驅動電壓一般為PWM(Pulse、width、modulation脈寬調制)信號,信號周期為Ts,則信號頻率為f=1/Ts,導通時間為Ton,關斷時間為Toff,則周期Ts=Ton+Toff,占空比Dy=、Ton/Ts。 Boost變換器:也稱升壓式變換器,是一種輸出電壓高于輸入電壓的單管不隔離直流變換器。 開關管Q也為PWM控制方式,但最大占空比Dy必須限制,不允許在Dy=1的狀態下工作。電感Lf在輸入側,稱為升壓電感。Boost變換器也有CCM和DCM兩種工作方式 Buck/Boost變換器:也稱升降壓式變換器,是一種輸出電壓既可低于也可高于輸入電壓的單管不隔離直流變換器,但其輸出電壓的極性與輸入電壓相反。Buck/Boost變換器可看做是Buck變換器和Bo
上傳時間: 2021-10-18
上傳用戶:
MAX30102芯片心率血氧傳感器模塊傳感器模塊軟硬件設計資料包括STM32測試源碼AD設計原理圖及心率及血氧參考設計資料:參考代碼及實驗數據工程文件及庫心率及血氧參考設計資料芯片數據手冊1771.pdf2ES Teck PEMS White Paper.pdf31930_accessories.pdf5273c08fe2b6b_1_4264142A_EN_p.pdfAvant 2120 Brochure.pdfcelyon-1057-daeg.pdfDr. Bob case study for dental.pdfenvitec.pdfgclarke-2015-MASc-thesis.pdfiadt02i4p261.pdfIHE_PCD_Suppl_POI.pdfijcsit2014050679.pdfIMECS2009_pp1537-1540.pdfLuksSwensonPulseOximetryatHighAltitude.pdfMI_CCHD_Screener_Tips_Flier_3-21-13_422078_7.pdfMoon.pdfnotes6.pdfpansw_spo2_sensor.pdfPK_EN_MAsimo2008Product Catalog.pdfpm-60a-spo2-report-4.pdfPulse-oximetry-at-home.pdfPulse-oximetry.pdfPulse.pdfPulseOxFinal_low.pdfPulse_ox.pdfpxc3976461.pdfReusable SpO2 Sensors.pdfSP02-cross-reference-sensor.pdfsprt533.pdfsszb140.pdfview.pdf
上傳時間: 2021-11-24
上傳用戶:fliang