ECG Signal analysis

[Tomo8281]

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freemason wrote:

here is a little peaks and valleys detector, block diagram looks a  little bit messy at this time , but i think you'll understand easily

u can change the cursor style to * or + and use property nodes to place them on peaks/valley (P,Q,R,S,T) as and when they are detected and use those values in your program

cursor is the threshold limit

hope u get some idea from this

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That sounds amazing, but i can't open it :(! Im running labview 8.5 still. Could you maybe convert it to 8.5, is that possible because it sounds like that will really help!

[freemason]

see attached

for 8.5

[Tomo8281]

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freemason wrote:

see attached

for 8.5

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Nope, still says 'File version is later than the current LabVIEW version. An error occured loading VI 'Peak Detection.vi' LabVIEW load error code 9: VI version (8.6) is newer than LabVIEW version (8.5).'

😞

[freemason]

try this and let me know , i think i did not use a proper library while saving previously

if this dont work, i shall post a screenshot of code

also see attached peak/valley cursor placer

thanks

[Tomo8281]

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freemason wrote:

try this and let me know , i think i did not use a proper library while saving previously

if this dont work, i shall post a screenshot of code

also see attached peak/valley cursor placer

thanks

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Peak Detection.vi (41 kb) works perfectly, thanks! The other attachement doesn't though :\! Same 8.6 error.

Thanks,

Tom

[freemason]

here

made changes for signal input, has a sample ECG data now, so you can understand little better and relate to yours

[Tomo8281]

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freemason wrote:

here

made changes for signal input, has a sample ECG data now, so you can understand little better and relate to yours

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Thanks a lot :)! peak valley Cursor.vi (21 KB) works now, but Peak Detection.vi (31 KB) now says its 8.6 🙂 not my old 8.5 version! LabVIEW doesnt seem to have nice backwards compatibilty!

[Tomo8281]

Also my big problem at the moment, is getting my ECG signal (which is generated using  Biosignals addon ECG Simulator) into the array format needed for peak detection VIs. If i connect it to 'x' it automaticly adds an array (attached a jpg). This doesnt seem to work! I dont know whats happening. My VI is attached earlier on in the topic if that helps explaining it.

Thanks,

Tom

[GovBob]

I would suggest that you right click the error out of that Thresh hold peak detector vi and create an indicator for it. This will give you an error code you can reference. I'm not sure what you mean by the 'x' but I'm guessing your talking about the Convert from Dynamic data VI. This may not be configured correctly for the data you are getting out of the simulator. I don't have that simulator so I can't comment on it. If you double click on convert vi you can try a different configuration to see if it works. You are using CTRL h to bring up context help I hope

Hope this helps

[Coq_Rouge]

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Tomo8281  wrote

Also another thing. All the examples i have found, have been to deal with arrays. My data is a real time ECG signal that is randomly being generated.

Also are my loops right? Does everything have to be in the FOR loop? !

Just need to get detection of the ECG - P R Q S T peaks and ill be able to shoot off and do it all, im just stuck !

What do you mean by->My data is a real time ECG signal that is randomly being generated.

 You will read from DAQ unit in the same maner as your ECG simulator works. You can not analyse your ECG signal sample by sample. You have to have to collect some data before you can analyse for heart rate, or do anylysis on the ECG complex. Use a data window(an array of data) equal to 3-5 seconds, and update once every second.