movement of a needle to be calibrated.

[suneelkv]

Hi Friends,

I've a requirement for my project and it should be done in Labview (NI Vision). ..

Please help me in finding the sol.

Using NI VIsion

I've to capture a needle movement....

Its basically for a needle movement of a cluster.

in other terms an indicator needle of bike or a car..

Using some NI Vision examples of meter_calibrate.vi i've done a project for calculating the speed...

But right now the req. is to calculate the time taken by the needle to move from say 10Kmph to 100Kmph..

Please hep me in giving a formula/hint/design or a VI so that i can modify accordingly...

Cheers,

Suneel.V

[yaHeard]

Hello Suneel,

I would take a look at the Meter Example.vi found in the NI Example Finder.  That will give you a good indication of how the Meter VIs work within LabVIEW.  You are right, however, that the output is simply the calibrated percentage of the needle's position with respect to the full range of the meter.  So what you can do to get the time it takes to get from 10 km/h to 100 km/h is to constantly read the needle's position and once it gets to 10, start a timing VI and then stop the time when the needle reaches 100.  This will get you the acceleration.