DAQ Triggers in Matlab

Posted by RidePlanet on Stack Overflow See other posts from Stack Overflow or by RidePlanet
Published on 2009-03-26T01:40:31Z Indexed on 2010/04/05 21:03 UTC
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matlab

I'm writing a program that detects the speed of a object by hall effect sensors that are run into MATLAB through a DAQ (MCC USB-1408FS)

The problem that has arisen is that I'm using a non-stop scan technique to detect the state of one of 3 sensors. Unfortunately this means that unless the object is rotating past each sensor at the exact rate the program runs, I will see an instantaneous speed (done by comparing the time between two sensors) of zero.

I need the sensors to signal the program to count when they are hit, instead of constantly scanning for the signal. How can this be done?

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