Cov txheej txheem:
- Kauj Ruam 1: Txheeb xyuas Cov Lim thiab Cov Amplifiers Yuav Siv Li Cas
- Kauj Ruam 2: Tsim Cov Khoom Siv Hluav Taws Xob thiab ntsuas nws
- Kauj Ruam 3: Tsim Nthuav Dej Lim thiab Xeem Nws
- Kauj Ruam 4: Tsim Tsawg-dhau Lim thiab Xeem Nws
- Kauj Ruam 5: Muab tag nrho 3 Cheeb Tsam thiab Simulate Electrocardiogram (ECG)
- Kauj Ruam 6: Teeb DAQ Pawg Thawj Coj
- Kauj Ruam 7: Qhib LabView, Tsim Txoj Haujlwm Tshiab thiab teeb tsa DAQ Tus Pabcuam
- Kauj Ruam 8: Code LabView los Txheeb Xyuas Cheeb Tsam ntawm ECG Teeb Meem thiab Xeem Lub Plawv Lub Plawv
- Kauj Ruam 9: Ua ke ntawm Circuit thiab LabView Cheebtsam thiab Nqa mus rau tus neeg tiag
Video: ECG thiab Lub Plawv Tus Nqi Tus Neeg Siv Kev Sib Tham: 9 Kauj Ruam
2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:29
Txog qhov kev qhia no, peb yuav qhia koj yuav tsim lub Circuit kom tau txais koj lub plawv dhia thiab tso nws mus rau tus siv virtual interface (VUI) nrog cov duab tso tawm ntawm koj lub plawv dhia thiab koj lub plawv dhia. Qhov no xav tau kev sib xyaw ua ke yooj yim ntawm cov khoom siv hluav taws xob thiab software LabView los tshuaj xyuas thiab tso tawm cov ntaub ntawv. Qhov no tsis yog khoom siv kho mob. Qhov no yog rau lub hom phiaj kev kawm tsuas yog siv cov cim ntsuas. Yog tias siv qhov kev ntsuas no rau kev ntsuas ECG tiag tiag, thov xyuas kom lub Circuit Court thiab Circuit-to-instrument txuas tau siv cov txheej txheem cais tawm kom raug.
Khoom siv
Circuit Court:
- Breadboard:
- Resistors:
- Capacitors:
- Op Amps:
- Cov xov hluav taws xob (suav nrog hauv Breadboard txuas)
- Cov nab kuab
- Txiv tsawb chords
- Agilent E3631A DC Fais Fab Khoom
- Muaj nuj nqi Generator
- Oscilloscope
LabView:
- LabView software
- DAQ pawg thawj coj saib
- Cov xov hluav taws xob
- Raug rho tawm Analog Input
- Muaj nuj nqi generator
Kauj Ruam 1: Txheeb xyuas Cov Lim thiab Cov Amplifiers Yuav Siv Li Cas
Txhawm rau sawv cev rau ECG lub teeb liab, peb theem sib txawv ntawm qhov Circuit Court tau tsim thiab siv los: ntsuas qhov ntsuas qhov ntsuas, ntsuas qhov ntsuas, thiab lim qis. Cov cuab yeej siv suab nrov ua kom lub teeb liab zoo li thaum tau txais los ntawm cov ncauj lus feem ntau me me thiab nyuaj rau pom thiab txheeb xyuas. Lub ntsuas phoo siv los tshem tawm suab nrov ntawm 60Hz vim tias ECG teeb liab tsis muaj cov cim ntawm 60Hz. Thaum kawg lub lim lim qis tshem tawm cov zaus ntau dua kom tshem suab nrov los ntawm lub teeb liab thiab ua ke nrog lub ntsej muag lim pom tsuas yog tso cai rau hauv cov zaus uas sawv cev hauv ECG teeb liab.
Kauj Ruam 2: Tsim Cov Khoom Siv Hluav Taws Xob thiab ntsuas nws
Lub tshuab hluav taws xob xav tau kom muaj qhov nce ntawm 1000 V/V thiab raws li nws tuaj yeem pom, lub suab nrov tau ua los ntawm ob theem. Yog li, qhov nce yuav tsum tau muab faib sib npaug ntawm ob theem, nrog K1 yog qhov nce ntawm thawj qib thiab K2 yog qhov nce ntawm theem ob. Peb txiav txim siab K1 yog 40 thiab K2 yog 25. Cov no yog qhov muaj txiaj ntsig zoo vim qhov tseeb tias thaum sib koom ua ke, tau txais txiaj ntsig ntawm 1000 V/V tau txais, 40 x 25 = 1000, thiab lawv yog qhov sib piv, nrog qhov sib txawv ntawm 15 V/V. Siv cov txiaj ntsig no rau qhov tau txais, qhov kev tawm tsam kom raug tuaj yeem suav tau. Cov zauv hauv qab no yog siv rau cov laij lej no:
Theem 1 Tau Txais: K1 = 1 + 2R2R1 (1)
Theem 2 Tau Txais: K2 = -R4R3 (2)
Peb txiav txim siab xaiv tus nqi ntawm R1, hauv qhov no nws yog 1 kΩ, thiab tom qab ntawd daws rau tus nqi R2. Plugging cov txiaj ntsig yav dhau los rau hauv qhov sib npaug rau theem 1 nce, peb tau txais:
40 = 1 + 2R2*1000⇒R2 = 19, 500 Ω
Nws yog ib qho tseem ceeb kom ntseeg tau tias thaum xaiv qhov kev tawm tsam, lawv nyob hauv kOhm ntau vim tias txoj cai ntawm tus ntiv tes xoo uas loj dua tus tiv thaiv yog, lub zog ntau dua tuaj yeem nyab xeeb kom tsis muaj kev puas tsuaj. Yog tias qhov kev tiv thaiv me me thiab muaj qhov loj heev dhau ntawm qhov tam sim no, yuav muaj kev puas tsuaj rau tus tiv thaiv thiab ntxiv rau lub Circuit Court nws tus kheej yuav tsis tuaj yeem ua haujlwm. Ua raws li cov txheej txheem qub rau theem 2, peb tau xaiv tus nqi ntawm R3, 1 kΩ, thiab tom qab ntawd daws rau R4. Plugging cov txiaj ntsig yav dhau los rau hauv qhov sib npaug rau theem 2 nce, peb tau txais: 25 = -R4*1000 ⇒R4 = 25000 Ω
Qhov tsis zoo kos npe yog negated raws li kev tawm tsam tsis tuaj yeem tsis zoo. Thaum koj muaj cov txiaj ntsig no, tsim cov duab hauv qab no. Tom qab ntawd sim nws!
Lub Agilent E3631A DC Lub Hwj Huam Muab lub zog ua haujlwm ua haujlwm nrog tso tawm ntawm +15 V thiab -15 V mus rau tus pin 4 thiab 7. Teem lub tshuab hluav taws xob ua haujlwm kom tso tawm Lub plawv Waveform nrog zaus ntawm 1 kHz, Vpp ntawm 12.7 mV, thiab ib qho offset ntawm 0 V. Cov tswv yim no yuav tsum yog tus pin 3 ntawm cov khoom siv ua haujlwm tau zoo hauv thawj theem ntawm Circuit Court. Qhov tso tawm ntawm lub tshuab hluav taws xob, los ntawm tus pin 6 ntawm lub tshuab ua haujlwm ntawm theem ob, tau tshwm rau ntawm channel 1 ntawm oscilloscope thiab qhov ntsuas hluav taws xob siab-rau-ncov yog ntsuas thiab kaw. Txhawm rau kom ntseeg tau tias qhov ntsuas qhov ntsuas tau nce tsawg kawg yog 1000 V/V, qhov ntsuas hluav taws xob siab-rau-ncov yuav tsum yog yam tsawg 12.7 V.
Kauj Ruam 3: Tsim Nthuav Dej Lim thiab Xeem Nws
Lub tshuab lim dej yuav tsum tau tshem tawm 60 Hz suab nrov los ntawm biosignal. Ntxiv rau qhov yuav tsum tau ua, vim tias lub lim dej no tsis xav tau suav nrog kev nthuav dav ntxiv, qhov ua tau zoo tau teeb tsa rau 1. Raws li nrog cov cuab yeej ntsuas qhov ntsuas, peb xub txiav txim siab qhov tseem ceeb rau R1, R2, R3, thiab C siv cov qauv hauv qab no sib npaug rau lub lim dej lim: R1 = 1/(2Q⍵0C)
R2 = 2Q/(⍵0C)
R3 = R1R/(2R1 + R2)
Q = ⍵0/β
β = ⍵c2 -c1
Qhov twg Q = qhov ua tau zoo
⍵0 = 2πf0 = nruab nrab zaus hauv rad/sec
f0 = qhov nruab nrab zaus hauv Hz
β = bandwidth hauv rad/sec
⍵c1, ⍵c2 = txiav tawm zaus (rad/sec)
Peb txiav txim siab xaiv tus nqi C, qhov no nws yog 0.15 µF, thiab tom qab ntawd daws rau tus nqi R1. Plugging hauv qhov txiaj ntsig yav dhau los teev tseg ntawm qhov ua tau zoo, qhov nruab nrab zaus, thiab lub peev xwm, peb tau txais:
R1 = 1/(2 (1) (2π60) (0.15x10-6)) = 1105.25 Ω
Raws li tau hais los saum toj no thaum tham txog kev tsim qauv ntawm lub ntsuas qhov ntsuas, nws tseem yog ib qho tseem ceeb kom ntseeg tau tias thaum daws qhov kev tawm tsam uas lawv nyob hauv kOhm ntau yam yog li tsis muaj kev puas tsuaj rau lub Circuit Court. Yog tias thaum daws qhov kev tawm tsam, ib qho me me dhau, tus nqi yuav tsum tau hloov pauv, xws li lub peev xwm, kom ntseeg tau tias qhov no tsis tshwm sim. Zoo sib xws los daws qhov sib npaug rau R1, R2 thiab R3can daws tau:
R2 = 2 (1)/[(2π60) (0.15x10-6)] = 289.9 kΩ
R3 = (1105.25) (289.9x103)/[(1105.25) + (289.9x103)] = 1095.84 Ω
Ib qho ntxiv, daws qhov bandwidth txhawm rau kom nws ua tus nqi theoretical los sib piv rau tus nqi sim tom qab:
1 = (2π60)/β⇒β = 47.12 rad/sec
Thaum koj paub qhov kev tiv thaiv qhov tseem ceeb tsim hluav taws xob ntawm lub khob cij.
Tsuas yog theem ntawm Circuit no yuav tsum tau sim ntawm qhov no, yog li nws yuav tsum tsis txhob txuas nrog lub cuab yeej ntsuas qhov ntsuas. Agilent E3631A DC Lub Hwj Huam Siv tau siv los ua haujlwm lub zog ua haujlwm nrog qhov tso tawm ntawm +15 V thiab -15 V mus rau tus pin 4 thiab 7. Lub tshuab hluav taws xob ua haujlwm tau teeb tsa los ua sinusoidal waveform nrog thawj zaus ntawm 10 Hz, Vpp ntawm 1 V, thiab qhov offset ntawm 0 V. Cov tswv yim zoo yuav tsum txuas nrog R1 thiab cov tswv yim tsis zoo yuav tsum txuas nrog hauv av. Cov tswv yim tseem yuav tsum txuas nrog channel 1 ntawm oscilloscope. Qhov tso tawm ntawm lub ntsej muag lim, los ntawm tus pin 6 ntawm lub tshuab ua haujlwm ua haujlwm tau tshwm rau ntawm channel 2 ntawm oscilloscope. AC cheb raug ntsuas thiab sau tseg los ntawm qhov sib txawv ntawm 10 Hz txog 100 Hz. Qhov zaus tuaj yeem nce ntxiv los ntawm 10 Hz kom txog thaum nce mus txog 50. Tom qab ntawd nce ntxiv ntawm 2 Hz yog siv txog 59 Hz. Thaum mus txog 59 Hz, nce ntxiv ntawm 0.1 Hz yuav tsum tau ua. Tom qab ntawd, tom qab 60 Hz mus txog, qhov nce ntxiv tuaj yeem nce ntxiv ib zaug. Qhov Vout/Vin piv thiab lub kaum sab xis yuav tsum tau sau tseg. Yog tias Vout/Vin piv tsis tsawg dua lossis sib npaug rau -20 dB ntawm 60 Hz, qhov kev tiv thaiv qhov tseem ceeb yuav tsum tau hloov kho kom ntseeg tau qhov piv txwv no. Cov lus teb cov lus teb zaus thiab cov lus teb cov lus teb tau tsim los ntawm cov ntaub ntawv no. Cov lus teb zaus yuav tsum zoo li ntawd hauv kab ntawv, uas ua pov thawj tias cov zaus ib puag ncig 60Hz raug tshem tawm, uas yog yam koj xav tau!
Kauj Ruam 4: Tsim Tsawg-dhau Lim thiab Xeem Nws
Qhov kev txiav tawm ntawm qhov lim qis dhau yog txiav txim siab li 150 Hz. Tus nqi no tau xaiv vim tias koj xav khaws tag nrho cov zaus uas muaj nyob hauv ECG thaum tshem tawm cov suab nrov dhau, tshwj xeeb yog pom ntawm ntau zaus. Qhov zaus ntawm T yoj nyob ntawm thaj tsam ntawm 0-10 Hz, P yoj nyob ntawm thaj tsam ntawm 5-30 Hz, thiab QRS txoj hauv thaj tsam 8-50 Hz. Txawm li cas los xij, kev hloov pauv hauv lub plawv tsis zoo yog qhov ua rau muaj ntau zaus, feem ntau siab dua 70 Hz. Yog li ntawd, 150 Hz tau raug xaiv los ua qhov txiav tawm zaus kom ntseeg tau tias peb tuaj yeem ntes txhua zaus, txawm tias ntau zaus ntau dua, thaum txiav tawm lub suab nrov nrov. Ntxiv rau 150 Hz txiav tawm zaus, qhov ua tau zoo, K, tau teeb tsa rau 1 vim tias tsis xav tau kev nthuav dav ntxiv. Peb xub txiav txim siab qhov tseem ceeb rau R1, R2, R3, R4, C1, thiab C2 siv cov qauv tsim hauv qab no rau qhov lim qis dhau:
R1 = 2/
R2 = 1/[bC1C2R1⍵c^2]
R3 = K (R1+ R2)/(K -1) thaum K> 1
R4 = K (R1+R2)
C2 txog 10/fc uF
C1 <C2 [a2 + 4b (K -1)] 4b
Qhov twg K = nce
=c = txiav tawm zaus (rad/sec)
fc = txiav tawm zaus (Hz)
a = lim coefficient = 1.414214
b = lim coefficient = 1
Vim tias qhov nce yog 1, R3 tau hloov pauv los ntawm kev qhib hluav taws xob thiab R4is hloov los ntawm luv luv Circuit Court uas ua rau nws ua raws qhov hluav taws xob. Yog li ntawd, cov txiaj ntsig no tsis tas yuav daws. Peb xub daws qhov txiaj ntsig ntawm C2. Plugging cov txiaj ntsig yav dhau los rau hauv qhov sib npaug, peb tau txais:
C2 = 10/150 uF = 0.047 uF
Tom qab ntawd, C1 tuaj yeem daws tau siv tus nqi ntawm C2.
C1 <(0.047x10^-6) [1.414214^2 + 4 (1) (1 -1)]/4 (1)
C1 <0.024 uF = 0.022 uF
Thaum qhov ntsuas qhov muaj peev xwm tau daws rau, R1 thiab R2 tuaj yeem suav ua raws li hauv qab no:
R1 = 2 (2π150) [(1.414214) (0.047x10-6) + ([1.4142142 + 4 (1) (1 -1)] 0.047x10-6) 2-4 (1) (0.022x10-6) (0.047) x10-6))] R1 = 25486.92 Ω
R2 = 1 (1) (0.022x10-6) (0.047x10-6) (25486.92) (2π150) 2 = 42718.89 Ω
Nrog rau txoj cai tiv thaiv tsim cov kab hluav taws xob pom hauv daim duab kos.
Qhov no yog theem kawg ntawm kev tsim qauv tag nrho thiab yuav tsum tau tsim ntawm lub khob cij ncaj qha mus rau sab laug ntawm lub thais lim nrog qhov tso tawm ntawm lub thais lim thiab cov hluav taws xob nkag rau qhov lim qis. Lub voj voog no yuav tsum tau tsim los siv tib lub rooj noj mov ib yam li yav tas los, nrog rau kev suav kom raug qhov kev tiv thaiv thiab lub peev xwm, thiab ib lub tshuab ua haujlwm ua haujlwm. Thaum tsim lub Circuit Court siv daim duab kos duab hauv daim duab 3, nws tau sim. Tsuas yog theem no yog yuav tsum tau sim ntawm qhov no, yog li nws yuav tsum tsis txuas nrog ib qho cuab yeej siv lub tshuab ua suab nrov lossis lub ntsej muag lim. Yog li ntawd, Agilent E3631A DC Power Supply tau siv los ua lub zog ua haujlwm nrog qhov tso tawm ntawm +15 thiab -15 V mus rau tus pin 4 thiab 7. Lub tshuab hluav taws xob ua haujlwm tau teeb tsa los ua sinusoidal waveform nrog thawj zaus ntawm 10 Hz, a Vpp ntawm 1 V, thiab qhov offset ntawm 0 V. Cov tswv yim zoo yuav tsum txuas nrog R1 thiab cov tswv yim tsis zoo yuav tsum txuas nrog hauv av. Cov tswv yim tseem yuav tsum txuas nrog channel 1 ntawm oscilloscope. Qhov tso tawm ntawm lub ntsej muag lim, los ntawm tus pin 6 ntawm lub tshuab ua haujlwm ua haujlwm tau tshwm rau ntawm channel 2 ntawm oscilloscope. AC cheb raug ntsuas thiab sau tseg los ntawm qhov sib txawv ntawm 10 Hz txog 300 Hz. Qhov zaus tuaj yeem nce ntxiv 10 Hz nce ntxiv kom txog thaum txiav tawm ntawm 150 Hz. Tom qab ntawd, qhov zaus yuav tsum nce los ntawm 5 Hz kom txog 250 Hz. Kev nce qib siab dua ntawm 10 Hz tuaj yeem siv los ua kom tiav qhov cheb. Vout/Vin piv thiab lub kaum sab xis tau sau tseg. Yog tias qhov txiav tawm zaus tsis yog 150 Hz, tom qab ntawd qhov kev tiv thaiv qhov tseem ceeb yuav tsum tau hloov kho kom ntseeg tau tias tus nqi no yog qhov tseeb txiav tawm zaus. Cov lus teb cov lus teb yuav tsum zoo li daim duab uas koj tuaj yeem pom tias qhov txiav tawm zaus yog nyob ib puag ncig 150Hz.
Kauj Ruam 5: Muab tag nrho 3 Cheeb Tsam thiab Simulate Electrocardiogram (ECG)
Txuas tag nrho peb theem los ntawm kev ntxiv cov xaim nruab nrab ntawm cov khoom siv hluav taws xob kawg ntawm cov khoom tiv thaiv yav dhau los rau qhov pib ntawm cov khoom tiv thaiv tom ntej. Lub Circuit Court tag nrho yog pom hauv daim duab.
Siv lub tshuab hluav taws xob ua haujlwm, sim lwm lub teeb liab ECG los ntawm Yog tias cov khoom tau tsim thiab txuas nrog ua tiav, koj cov zis ntawm oscilloscope yuav tsum zoo li qhov hauv daim duab.
Kauj Ruam 6: Teeb DAQ Pawg Thawj Coj
Saum toj ntawm DAQ pawg thawj coj tuaj yeem pom. Txuas nws mus rau tom qab ntawm lub khoos phis tawj kom txhawb nws thiab tso Isolated Analog Input hauv channel 8 ntawm pawg thawj coj (ACH 0/8). Ntxig ob lub xov hlau rau hauv lub qhov cim "1" thiab "2" ntawm Isolated Analog Input. Teeb tsa lub tshuab hluav taws xob ua haujlwm kom tso tawm ECG teeb liab ntawm 1Hz nrog Vpp ntawm 500mV thiab qhov pib ntawm 0V. Txuas cov zis ntawm lub tshuab hluav taws xob ua haujlwm rau cov xov hlau tso rau hauv Isolated Analog Input.
Kauj Ruam 7: Qhib LabView, Tsim Txoj Haujlwm Tshiab thiab teeb tsa DAQ Tus Pabcuam
Qhib LabView software thiab tsim txoj haujlwm tshiab thiab qhib VI tshiab hauv qab cov ntawv qhia zaub mov nco. Txoj cai nyem rau ntawm nplooj ntawv kom qhib lub qhov rai tivthaiv. Tshawb nrhiav 'DAQ Assistant Input' thiab rub nws mus rau qhov screen. Qhov no yuav cia li rub thawj lub qhov rai.
Xaiv Tau Txais Cov Teeb Meem> Analog Input> Voltage. Qhov no yuav rub lub qhov rai thib ob.
Xaiv ai8 vim tias koj tso koj cov Isolated Analog Input hauv channel 8. Xaiv Finish los rub lub qhov rai kawg.
Hloov Hom Kev Tau Txais mus rau Cov Qauv Txuas Mus Ntxiv, Cov Qauv Nyeem Ntawv rau 2k thiab Tus Nqi rau 1kHz. Tom qab ntawd Xaiv Khiav nyob rau sab saum toj ntawm koj lub qhov rais thiab cov zis zoo li uas pom saum toj no yuav tsum tshwm. Yog tias ECG teeb liab hloov pauv, tsuas yog hloov qhov sib txuas los ntawm lub tshuab hluav taws xob ua haujlwm rau DAQ pawg thawj coj ncig. Qhov no qhia tau tias koj ua tiav tau txais lub teeb liab ECG! (Yay!) Tam sim no koj yuav tsum tau sau nws los tshuaj xyuas nws!
Kauj Ruam 8: Code LabView los Txheeb Xyuas Cheeb Tsam ntawm ECG Teeb Meem thiab Xeem Lub Plawv Lub Plawv
Siv cov cim hauv daim duab hauv LabView
Koj twb tau tso DAQ Tus Pabcuam. Tus Pab DAQ siv lub teeb liab nkag mus, uas yog lub teeb liab sib piv, piv txwv los ntawm lub tshuab hluav taws xob ua haujlwm lossis tau txais ncaj qha los ntawm ib tus neeg txuas rau kom tsim nyog tso hluav taws xob. Tom qab ntawd nws siv lub cim no thiab sau nws los ntawm A/D hloov pauv nrog kev ntsuas txuas mus tas li thiab tsis ntsuas ntawm 2000 qhov kev kuaj kom tau nyeem, tus lej 1 kHz piv txwv thiab nrog qhov siab tshaj plaws thiab qhov hluav taws xob qhov tseem ceeb yog 10V thiab -10V feem. Qhov teeb meem tau txais no yog tom qab tso tawm ntawm kab ntawv kom nws tuaj yeem pom qhov muag. Nws kuj tseem siv qhov kev hloov pauv yoj yoj ntxiv thiab ntxiv 5, kom ntseeg tau tias nws suav rau qhov tsis zoo thiab tom qab ntawd muab sib npaug los ntawm 200 kom ua rau qhov siab tshaj qhov sib txawv, loj dua thiab yooj yim dua rau kev tshuaj xyuas. Nws tom qab txiav txim siab qhov max thiab min tus nqi ntawm qhov ua haujlwm hauv lub qhov rai muab ntawm 2.5 vib nas this los ntawm qhov ua haujlwm siab/min. Tus nqi siab tshaj xav tau yuav tsum tau muab sib npaug los ntawm ib feem pua uas tuaj yeem hloov pauv tab sis feem ntau yog 90% (0.9). Tus nqi no yog tom qab ntxiv rau tus nqi min thiab xa mus rau qhov siab tshaj plaws ua haujlwm raws li qhov pib. Raws li qhov tshwm sim txhua lub ntsiab lus ntawm kab teeb duab nthwv dej uas tshaj qhov pib no tau txhais tias yog lub ncov thiab tau txais kev cawmdim raws li qhov ntau ntawm qhov siab tshaj plaws nyob rau hauv lub ncov ntsuas pom tus neeg teb xov tooj. Qhov array ntawm qhov siab tshaj plaws yog tom qab ntawd xa mus rau ob txoj haujlwm sib txawv. Ib qho ntawm cov haujlwm no tau txais ob qho txiaj ntsig siab tshaj plaws thiab cov txiaj ntsig ua haujlwm los ntawm tus nqi siab tshaj. Tsis pub dhau txoj haujlwm no, dt, ob lub tswv yim no tau hloov pauv mus rau lub sijhawm muaj txiaj ntsig rau txhua qhov siab. Qhov ua haujlwm thib ob suav nrog ob tus neeg ua haujlwm ntsuas uas coj qhov chaw tso tawm ntawm qhov ua kom pom tseeb tshaj plaws thiab ntsuas lawv sib cais kom tau txais qhov chaw nyob ntawm 0th ncov thiab 1st ncov. Qhov sib txawv ntawm ob qhov chaw no tau suav los ntawm tus neeg ua haujlwm rho tawm thiab tom qab ntawd suav nrog lub sijhawm qhov txiaj ntsig tau los ntawm dt muaj nuj nqi. Qhov no tso tawm lub sijhawm, lossis lub sijhawm nruab nrab ntawm ob qhov siab tshaj hauv vib nas this. Los ntawm kev txhais, 60 faib los ntawm lub sijhawm muab BPM. Tus nqi no yog tom qab ntawd dhau los ntawm kev ua haujlwm kom paub tseeb tias cov txiaj ntsig ib txwm muaj qhov zoo thiab tom qab ntawd muab sib npaug rau tus lej ze tshaj. Qhov no yog cov kauj ruam kawg hauv kev suav thiab thaum kawg tso lub plawv dhia mus rau tib lub vijtsam ib yam li cov duab tso tawm. Thaum kawg qhov no yog dab tsi daim duab thaiv yuav tsum zoo li thawj daim duab.
Tom qab ua tiav daim duab thaiv, yog tias koj khiav qhov program koj yuav tsum tau txais cov duab tso tawm.
Kauj Ruam 9: Ua ke ntawm Circuit thiab LabView Cheebtsam thiab Nqa mus rau tus neeg tiag
Tam sim no rau qhov lom zem ib feem! Ua ke koj lub Circuit zoo nkauj thiab LabView program kom tau txais ECG tiag tiag thiab suav nws lub plawv dhia. Txhawm rau hloov kho qhov Circuit Court kom ua raws li tib neeg thiab tsim lub teeb pom kev zoo, qhov nce ntawm qhov ntsuas qhov ntsuas yuav tsum raug txo kom nce mus rau 100. Qhov no yog vim qhov tseeb tias thaum txuas nrog ib tus neeg, muaj qhov offset uas tom qab ntawd saturates kev ua haujlwm amplifier. Los ntawm kev txo qis qhov nce, qhov no yuav txo qhov teeb meem no. Ua ntej, qhov nce ntawm thawj theem ntawm qhov ntsuas qhov ntsuas tau hloov pauv mus rau qhov nce ntawm 4 kom tag nrho cov txiaj ntsig yog 100. Tom qab ntawd, siv qhov sib npaug 1, R2is teeb tsa rau 19.5 kΩ, thiab R1is pom raws li hauv qab no:
4 = 1 + 2 (19, 500) R1⇒R1 = 13 kΩ Tag nrho cov kev sib txuas tau txuas nrog thiab lub Circuit Court tuaj yeem sim siv LabView. Lub Agilent E3631A DC Lub Hwj Huam Lub Hwj Huam ua haujlwm rau lub zog ua haujlwm nrog qhov tso tawm ntawm +15 V thiab -15 V mus rau tus pin 4 thiab 7. ECG cov tshuab hluav taws xob txuas nrog rau cov ntsiab lus nrog cov hmoov txhuas zoo (G1) mus rau sab laug pob taws, cov hmoov txhuas tsis zoo (G2) mus rau lub dab teg sab xis, thiab hauv av (COM) mus rau pob taws sab xis. Tib neeg cov tswv yim yuav tsum yog tus pin 3 ntawm cov khoom siv ua haujlwm hauv thawj theem ntawm Circuit Court nrog cov hlau lead zoo txuas nrog tus pin 3 ntawm thawj lub tshuab ua haujlwm ua haujlwm tsis zoo thiab cov hlau lead tsis zoo txuas nrog tus pin 3 ntawm lub tshuab ua haujlwm thib ob. Cov av txuas mus rau hauv av ntawm lub khob cij. Qhov tso tawm ntawm lub tshuab hluav taws xob, los ntawm tus pin 6 ntawm cov lim qis dhau, txuas nrog DAQ pawg thawj coj. Nco ntsoov kom nyob ntsiag to thiab nyob ntsiag to thiab koj yuav tsum tau txais cov txiaj ntsig hauv LabView uas zoo ib yam li hauv daim duab.
Lub teeb liab no pom tseeb tias muaj suab nrov ntau dua li lub teeb liab zoo tshaj los ntawm lub tshuab hluav taws xob ua haujlwm. Raws li qhov tshwm sim koj lub plawv dhia yuav dhia ntau tab sis yuav tsum hloov pauv nrog qhov ntau ntawm 60-90 BPM. Thiab muaj koj muaj nws! Ib txoj hauv kev lom zem ntawm kev ntsuas peb tus kheej lub plawv dhia los ntawm kev tsim hluav taws xob thiab ntsuas qee cov software!
Pom zoo:
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