Programming in this formula

[crockengineer]

If I have a simple program consisting of a DAQ assistant inside a while loop with its data output in volts is there anyway to program in the following formula?

Acceleration= {((Vout1/125)/0.5)-((Vout2/125)/0.5)}/(T2-T1)

so if I start the program Vout1 will be the first data output and T1 will be the time in sec (0 sec) and Vout2 will be the second data output at time T2.  Essentially I am trying to convert the voltage output from my device into acceleration as the program runs.  Thanks.

[RavensFan]

Yes.  You want a shift register.  Feed the voltage into a shift register on the right hand side.  The left hand side of the shift register will be the value from the previous iteration of the loop.

[crockengineer]

what about T1 and T2?

[Chris_VH]

This should be what youre looking for, replacing the random rnumbers with DAQ Assist:

 

Also, that 500 ms wait was just for a quick glance making sure I wired everything correctly, you wouldn't need that per se.

Message Edited by Chris_VH on 03-31-2009 02:10 PM

[crockengineer]

delta T will be in Millisecond correct?

[Chris_VH]

Up to you, but in MY example, dividing by 1000 will give dT in seconds.