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problem of point by point filter

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Hi,

 

I make biosignal monitor Vi.

 

But there is problem.

 

When I send the data 250Hz, point by point filter working well.

 

But I send the data 500Hz,  point by point filter not working.

 

Is there any problem of my Vi?

 

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Message 1 of 5
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Hi Sangkyu,

 

so you did not change anything in your VI despite of comments given before?

 

When I send the data 250Hz, point by point filter working well.

But I send the data 500Hz,  point by point filter not working.

Is there any problem of my Vi?

Surely it's your VI - and not those PtByPt-filters…

Please explain what exactly is "not working"! Did you check the "error" output of those filter functions when they "don't work"?

Show relevant data for the problem!

 

Btw. to add to my previous comments: your block diagram is way too big. It fills ~8 FullHD screens!

Best regards,
GerdW


using LV2016/2019/2021 on Win10/11+cRIO, TestStand2016/2019
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Thanks, GerdW.

 

I change bluetooth to rs-232, and add labview wait until next ms multiple function.

 

So, time recording well.

 

My filter don't filtering the signal.

 

There is not difference turn on filter or turn off filter.

 

 

 

 

 

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Solution
Accepted by topic author Sangkyu

Hi Sangkyu,

 

add labview wait until next ms multiple function.

Yes, with one more coercion dot. What's your problem with creating suitable constants?

And what's the point of this wait function? The iteration speed of your loops is determined by all those VISARead function anyway!

 

My filter don't filtering the signal.

There is not difference turn on filter or turn off filter.

- You did not wire the sampling frequency of the highpass filters.

- There are lots of coercion dots at all those functions!

- Did you check the error output as requested before?

 

Edit:

When I create a small test VI from your convoluted big mess then the filters work as expected…

Why don't you create such small test VIs to learn and understand about the function you want to use?

Best regards,
GerdW


using LV2016/2019/2021 on Win10/11+cRIO, TestStand2016/2019
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Thanks,,GerdW.

 

 

I mistake input the sampling rate.

 

 

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