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jabbar_2008
Joined: 05 May 2009
Posts: 1
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 18 Jul 2009 8:23 ecg filters |
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Hi!
i have build ECG acquisition hardware and then acquired this signal in MATLAB and LabVIEW using DAQmx(Data Acquisition device). the sampling ratewas 500Hz.
is this rate ok?
please help me with further filtering process, either IIR or FIR
My design is here
the output is here
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doraemon
Joined: 21 Jun 2009
Posts: 141
Helped: 17
Location: Japan
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18 Jul 2009 10:07 notch filter ecg |
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Hello!
For some reason your signal is extremely noisy.
I'm not sure about the hardware design. In my case, I took a reference design
from Texas Instruments. It looks similar...
I get about 1V peak to peak. 500 Hz is OK. The signal I get is clean (even
before filtering),
Apparently you have a very strong noise in the high frequencies so you should
try first to find the reason of all this noise. One other possibility is that your
signal is too weak, which makes the noise look a lot too strong. What is the
vertical unit? Are these volts?
What kind of electrode are you using?
Dora.
| jabbar_2008 wrote: |
Hi!
i have build ECG acquisition hardware and then acquired this signal in MATLAB and LabVIEW using DAQmx(Data Acquisition device). the sampling ratewas 500Hz.
is this rate ok?
please help me with further filtering process, either IIR or FIR
My design is here
the output is here
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akss_here
Joined: 12 Feb 2009
Posts: 52
Location: Bangalore
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19 Jul 2009 15:40 iir digital ecg filter |
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gud....
your design does not include any filter...
it would be better if you add some bandpass filter of 1-100Hz and T-notch filter for removing electrical noises from the circuit... that will suppress noise and your peaks will be clear,...
HAPPY 
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zigan
Joined: 04 Feb 2009
Posts: 3
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20 Jul 2009 0:08 ecg filters in or |
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| akss_here wrote: |
gud....
your design does not include any filter...
it would be better if you add some bandpass filter of 1-100Hz and T-notch filter for removing electrical noises from the circuit... that will suppress noise and your peaks will be clear,...
HAPPY |
please post your circuit and send me email : zigan(at)ymail.com
thank b4,,
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akss_here
Joined: 12 Feb 2009
Posts: 52
Location: Bangalore
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20 Jul 2009 4:51 iir notch filter ecg |
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follow simple steps...
search for specifications.. its not that much tough...
IA--> Band Pass filter --> T Notch Filter ---> ECG Base Signal....
i hope u can easily do this...
HAPPY
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Google
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20 Jul 2009 4:51 Ads |
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wavestorm1986
Joined: 20 Oct 2009
Posts: 2
Location: Malaysia
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02 Nov 2009 5:54 ECG Filters? |
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PLZZZZZZ DO U MIND TO SEND ME THE VI FOR THE LABVIEW, I HOPE YOU DONT MIND
wavestorm1986(at)yahoo.com
thanx
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akss_here
Joined: 12 Feb 2009
Posts: 52
Location: Bangalore
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02 Nov 2009 15:23 Re: ECG Filters? |
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| i did all processing in matlab..
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