triggered image acquisition

[Prathiksha]

hello, iam trying to calibrate my  system so i need to turn-ON led's in sequence one after the other and at the same time the system has to grab images only when any led is ON ......does anyone have a suggestion on how to do this because iam relatively new to labview

[udka]

Hi Prathiksha,

You can continuosly acquire image untill a condition is met using simple while loop.

Please find the vi, that does the same.

In this vi, image will be obtained when the random number generates value>0.9 and triggers.

[Prathiksha]

Could you please downgrade it to 8.6........my software is not letting me open the attachment

Thank you

[udka]

here you go for lv 8.6 🙂

[Prathiksha]

thank you for the example.......however i need to know how to synchronize an led to the acquisition part such that when it is on acquisition starts..........and also is it possible to program the software to capture images continuously for a specific time duration?????

[udka]

Hi Prathiksha,

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@Prathiksha wrote:

thank you for the example.......however i need to know how to synchronize an led to the acquisition part such that when it is on acquisition starts..........and also is it possible to program the software to capture images continuously for a specific time duration?????

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It is possible to continuously capture for specific time duration, in the code which i've sent keep timer value and if it's true just stop the loop which inturn stops the acquisition.

I'm not sure of other question.

[Prathiksha]

Thank you................if you get any info on the other topic please do inform me.....

[udka]

Hi Prathiksha,

Good that it helped u in somekind. For the other problem, u can create an event structure which will be triggered by the boolean and acquire the image in that event,that should solve the problem isn't it??

[Prathiksha]

hello,

thank you for the suggestion......i'll try it out...however before that i tried to toggle the led for 2 sec in a while loop of 500msec delay but instead of getting just 4 toggles i get 5.....any idea why? i've attached a picture of my vi.....hope you can find the problem

[udka]

While loops in labview are do-while loops. So that might be the case.