Processing Scope Waveforms

[Aojha]

Hi,

I want to process waveform coming from Scope.

I have to calculte positive peaks and get average value for values below 0.

Right Now I have done this

1- Replaced all values above 0 with 0.

2- Calculated there average values through basic DC RMS calculation VI.

3- Initialized an array with this average value.

4- Searched for maximum value between two consecutive 0 values and placed this value in already initialized array.

this whole processing is taking a lot of time.

Could you please provide a better way of doing this.

I tried to use Waveform Peak Detection VI but it is calculationg peaks through maxima and minima and giving me a lot of peak points although I reqiure only 1 in a period.

Please see attached I/p and Required O/P waveforms

[Aojha]

Hello,

Anyone there,

Please help me out.

[BillMe]

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@Aojha wrote:

Hi,

I want to process waveform coming from Scope.

I have to calculte positive peaks and get average value for values below 0.

Right Now I have done this

1- Replaced all values above 0 with 0.

2- Calculated there average values through basic DC RMS calculation VI.

3- Initialized an array with this average value.

4- Searched for maximum value between two consecutive 0 values and placed this value in already initialized array.

this whole processing is taking a lot of time.

Could you please provide a better way of doing this.

I tried to use Waveform Peak Detection VI but it is calculationg peaks through maxima and minima and giving me a lot of peak points although I reqiure only 1 in a period.

Please see attached I/p and Required O/P waveforms

---

What you have described doesn't make sense given your waveform. You said "get positive peaks and get average value for values below 0". There are no positive peaks with amplitudes below 0 in your waveform. There are VALLEYS however.

But then your output waveform shows that you have marked 8 positive peaks of amplitude 2.5 (which are ABOVE 0) and zeroed all other values, including the first two periods of the waveform. Please explain.

[Aojha]

Probably I was not clear in my question.

I want to measure all the positive peaks with reference to average value below 0.

[Aojha]

In the O/p Waveform I could not get the first two period due to some error in my coding. I am looking for them.

[BillMe]

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@Aojha wrote:

Probably I was not clear in my question.

I want to measure all the positive peaks with reference to average value below 0.

---

Sorry, I'm just not understanding what that means......long day.

[Aojha]

1- I have to get all th positive peaks value.

2- I have to take average value of values below 0.

3-  I have to take difference of Positive peak value and average value below 0.

[Aojha]

Let,s say I have an I/p waveform as attached in Post.

Then I have to find all the positive peaks.

Now suppose I have a waveform like intermediate waveform (attached). Here are only negative values, then I have to find its average.

[Aojha]

Dear all,

Please help me.