untitled

Size: px

Start display at page:

Download "untitled"

约亚房
4 years ago
Views:

1 Portable Electrode B B 量 ECG 路更量路 performance RF 量路 Portable Electrode 便利量 portable electrode 路濾濾行 electrode 類 FM modulation scheme ECG 類數 RF RF demodulate 利 Elvis Labview ECG 理理數 BPM portable electrode 路 data processing 論

2 portable electrode transmitter single-supply 來來 9V BJT voltage follower buffer 來 IC AD623 LP V GND -4.5V 流 ECG voltage follower 流 GND 不來 SNR 降說 single supply 惡 SNR ECG 不易 dual-supply IC +-5V 了量利 3V 串聯 +6V GND -6V 流率來 60Hz power supply 不理流 +5V GND -5V 流 Instrumentation amplifier: AD623 AD623 instrumental amplifier (IA) 來 OP741 amplifier schematic ref: AD623 datasheet 見 IA differential single pole design 60Hz 更 REF GND IA AD623 來 gain 不 gain input common mode voltage AD623 CMRR 不 saturation

Butterworth low-pass filter 7 Butterworth low-pass filter cut-off frequency 30Hz LP324 裡立 OPAMP OP741 路量 60Hz notch filter buffer 路 Twin-T 2 notch filter 來 60Hz notch filter input impedance 不了

3 Butterworth low-pass filter 7 Butterworth low-pass filter cut-off frequency 30Hz LP324 裡立 OPAMP OP741 路量 60Hz notch filter buffer 路 Twin-T 2 notch filter 來 60Hz notch filter input impedance 不了 OP741 buffer 1 st order high pass filter amplifier ECG notch filter output 見 amplitude 10~20mV 來路度不了更 ECG ECG DC offset saturation 令 RC high pass filter cut-off frequency 2Hz DC 濾 ECG 0 來利 OP741 量 ECG 理論 +VDD~-VDD 路 +5V~-5V OP741 ECG +4V~-3V saturate 來了 ECG 量便量見 P QRS complex T

IA 60Hz ECG 不易來便 modulation 27MHz FSK 率 4800bps 數 ECG 不 modulation 類 ECG 數來說類數 ADC 利 sequential output ADC 來 ADC0831 類 sequential output ADC synchronization 利說 synchronization 了 ECG 兩 parallel

4 IA 60Hz ECG 不易來便 modulation 27MHz FSK 率 4800bps 數 ECG 不 modulation 類 ECG 數來說類數 ADC 利 sequential output ADC 來 ADC0831 類 sequential output ADC synchronization 利說 synchronization 了 ECG 兩 parallel ADC0804 來利 8051 來 RS232 channel synchronization 8051 IC 率類 modulation 參利度率論 transmitter VCO modulation ECG 來率 receiver PLL demodulation track 率 transmitter ECG modulation scheme FM 利 LM566 transmitter 路

ref: 利度率 http://thesis.lib.cycu.edu.tw/etd-db/etd-search/getfile?urn=etd-0728104-133355& 見利來率率 receiver PLL 率 2.

5 ref: 利度率見利來率率 receiver PLL 率 2.27KHz Portable electrode receiver 不率 DC power supply demodulation 利易不率來利 LM565 PLL 來 demodulation ref: 利度率利來 PLL 率了率 2.27KHz VCO PLL 兩 2.27KHz

high-pass filter 零了 RC low-pass filter 不 ECG ECG 路 RC

6 ECG amplitude 兩率便不 demodulate ECG amplitude 100mV amplitude 濾 amplifier filter 利 OP741 PLL DC offset 了率 RC high-pass filter 零了 RC low-pass filter 不 ECG ECG 路 RC low-pass filter input output 見 RC filter input signal RC filter 便 output 量

ECG input signal amplitude output signal 見 input signal power portable electrode transmitter receiver ECG 量更兩度 ECG 來更濾 Labview 理更 performance Data processing Interface: PCI 6251 了 ECG 裡理利了

7 ECG input signal amplitude output signal 見 input signal power portable electrode transmitter receiver ECG 量更兩度 ECG 來更濾 Labview 理更 performance Data processing Interface: PCI 6251 了 ECG 裡理利了 PCI6251 Analog Voltage Channel 0 AI terminal configuration selection RSE mode DIFF(differential) RSE(referenced single ended) NRSE(non-referenced single ended) mode 不量 DIFF mode 兩 analog input channels 量不

noise mv RSE mode AI GND 讀 NRSE mode AI 讀 DAQ 不不 level 不 mode 量不 mode 不裡不說利 DAQ device mode 來 voltage level 了 offset 來 mode 便 output impedance 類 offset 不降讀 level 累 DAQ device 裡

8 noise mv RSE mode AI GND 讀 NRSE mode AI 讀 DAQ 不不 level 不 mode 量不 mode 不裡不說利 DAQ device mode 來 voltage level 了 offset 來 mode 便 output impedance 類 offset 不降讀 level 累 DAQ device 裡 instrumentation amplifier 便 DAQ voltage buffer buffer 量 ECG 了不 buffer Voltage input 5~-5V PCI bit Resolution 150uV ECG 率 250Hz 了 debug 便讀讀料來便利 Matlab 來 [p1]: NI M series user manual, CH4. Signal Processing RF 濾 DAQ device 不理 ECG waveform 裡參了濾 Labview7.0 便利 filter subvi 濾濾了 ECG waveform 便數便復 Butterworth Lowpass filter Notch(Bandstop) filter 理 15,16Hz 了理便 Labview Matlab

9 Hz db distortion 行 RF highpass filter 了 Hz peak 了 filter ripple 濾不行來串 bandstop filter Hz 不不 Butterworth 濾 cutoff

10 frequency 30Hz 復 ripple Time domain 理 Frequency domain Hz peak 2.Heart Beat Rate 來理數不來理數率 Pan-Tompkins algorithm ECG

integrator peak detection 類略 Differentiator Labview

11 Band-Pass Filter emphasize QRS complex Moving Average integrator Band-Pass Filter 裡類不理 moving averaging integrator peak detection 類略 Differentiator Labview Derivative x(t).vi 理 discrete differentiation LP filter 數數

12 濾 QRS complex peak 離來 QRS peak 不 threshold 不理理利 peak detector.vi peak 來 Peak Detector threshold 0.7 peak width 20 peak 來 moving averaging integrator 理 Labview 不便 peak detector peak 度 20 peak 不 0.08 peak width/sampling rate HBR 不例來 peak location index 62.44, , ,708.28, , 1.08,1.93, 2.8, 3.7 filter QRS complex interval 60 Heart beat rate data 裡 5 peak 4 率 67~72

13 3. 理數理數濾 QRS complex 來 P T 不不利兩理數 RS interval (i) R 利 Labview array R index R (ii) index 0.2 不 RS interval 0.1 S (iii) 兩 RS 兩 index RS interval 例來 QRS complex RS 0.175V RS interval 利類 R Q 類理數量

untitled

untitled 金金令金令不例律不令例金令 5 金數不金類類 5 90 年 8 20 (90) 09002177720 年年度律略.. 156 5 22 .. 金 272 行金例金金. 金易例金不金金六不利行不利金錄 23 異不異不不不令行金錄金理金金金金金金理金金更利金料來令 24 ()