Signal Conditioning

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calculate T1 and T2 of lightning impulse waveform

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Hi all labview user ! i'm just a new user of Labview and i have a problem about finding rise time and fall time of Full wave lightning impulse !! any idea about this problem when front panel result shown NaN while i try to find on Negative lightning impulse . sorry my english not too good.
best regard ,thanks !

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Message 1 of 8
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Solution
Accepted by topic author Techly.K

here is a Q&D solution avoiding the express vi (couldn't load your vi anyway ;)) and using the pulse measurement and trigger vis provided....

pulse detection.png

 

no time for clean up 😄    ups ..   slope ... your homework 😄 😄

 

Greetings from Germany
Henrik

LV since v3.1

“ground” is a convenient fantasy

'˙˙˙˙uıɐƃɐ lɐıp puɐ °06 ǝuoɥd ɹnoʎ uɹnʇ ǝsɐǝld 'ʎɹɐuıƃɐɯı sı pǝlɐıp ǝʌɐɥ noʎ ɹǝqɯnu ǝɥʇ'


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Message 2 of 8
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many thanks bro for ur solution !! u are welcome 😉

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Message 3 of 8
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brother can i ask u 1 more question ? how can i detect time of chopping impulse waveform ( Index or value ) ? can u suggest me some VI or some technic thanks .
best regard

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Message 4 of 8
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Some basics from school: Derivates help to find characteristic points.

Other handy tools:

low pass filter

high pass filter

FIR filter ..

 

But the best: How do you find them?

Draw it , wire it , run it 😄

 

Post some real data, and your vi ...

 

Greetings from Germany
Henrik

LV since v3.1

“ground” is a convenient fantasy

'˙˙˙˙uıɐƃɐ lɐıp puɐ °06 ǝuoɥd ɹnoʎ uɹnʇ ǝsɐǝld 'ʎɹɐuıƃɐɯı sı pǝlɐıp ǝʌɐɥ noʎ ɹǝqɯnu ǝɥʇ'


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Message 5 of 8
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here brother !! but i still can't fine that chopping value 

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Message 6 of 8
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Is real data and vi so easy to misunderstand??

 

 

Greetings from Germany
Henrik

LV since v3.1

“ground” is a convenient fantasy

'˙˙˙˙uıɐƃɐ lɐıp puɐ °06 ǝuoɥd ɹnoʎ uɹnʇ ǝsɐǝld 'ʎɹɐuıƃɐɯı sı pǝlɐıp ǝʌɐɥ noʎ ɹǝqɯnu ǝɥʇ'


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Message 7 of 8
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vi and I don’t know which vi I should use to detect that breakdown point (voltage) !! 

Many thanks 

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Message 8 of 8
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