Processing of aquired signal during aquisition (arrays?)

Hello,
I'm aquiring a voltage signal from a thermistor using DAQ and Labview. I'm using "for-loop" in Labview for that. Is it possible to take my previous readings of the voltage signal (through A/D channel), say, V(i-1), compare it to its current value V(i) and if a comparison condition holds - "freeze" V(i-1) and feed it continuously to a D/A channel,etc.
I'm basically trying to work with "arrays" in Labview, but can't get the voltage array previous values during the aquisition and manipulate with it during the aquisition.
Thanks.

Kostya
To get at the V(i-1) value just use a shift register, then make your comparison and use a select. I'm not sure whether your array is for the history of one thermistor or several different thermistors. Take a look at the picture it shows both a single channel and 3 channels. To initialise the shift register you can do a single measurement before you go into the loop.
Attachments:
Use_shift.png ‏7 KB

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Hello!
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Message Edited by _Pavel_ on 10-28-2009 05:21 PM
Solved!
Go to Solution.

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Go to Solution.
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sim signal.jpg ‏70 KB

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Processing of aquired signal during aquisition (arrays?)

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