Zero Crossing Point Help

[Werdna]

Hi all,

Looking to find the zero crossing points of a waveform. There are examples of this code but none of them i find do quite what i want.

I need the zero crossing points and also the direction of the crossing (negative going crossing or positive going crossing).

i am trying to get one array containing all the crossing points and one boolean array containing the direction information relating to that corssing. E.g True = positive crossing...etc.

Does anyone have an idea how i can get the direction information. Please see my code.

Regards

[RavensFan]

Search for the VI "Boolean Crossing Pt by Pt".  It can detect True to False, False to True, or changes in either direction.  Couple that with a greater than zero comparison, you should be good to go.

[qwerty257]

The boolean crossing Vi does detect a crossing but it does not tell you the direction, only that one has occured when the direction input is wired as both directions.

[apok]

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@qwerty257 wrote:

The boolean crossing Vi does detect a crossing but it does not tell you the direction, only that one has occured when the direction input is wired as both directions.

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use the zero crossing pt by pt.vi....check out the output bools?

Spoiler

[RavensFan]

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@qwerty257 wrote:

The boolean crossing Vi does detect a crossing but it does not tell you the direction, only that one has occured when the direction input is wired as both directions.

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Use two.  One for each direction.

EDIT:  I like Apok's zero crossing pt. by pt.  I hadn't come across that one before.  I had remembered the boolean one because it has been mentioned in several threads recently.;