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Who needs LabVIEW?

by aplonis (Pilgrim)
on Dec 27, 2006 at 03:38 UTC ( #591776=CUFP: print w/replies, xml ) Need Help??

I have a cyclic endurance test running where a jet engine fuel nozzle is exposed to pressure ramps from zero to full flow. Many thousands of them...several hundred hour's worth. Pressure is controlled, not by servo- or proportional valve because the fuel is heavily contaminated (on purpose) which would ruin those much faster than the unit under test.

So instead I have a stepper motor linked to a 20-turn needle valve dumping bypass flow back to the tank. And the stepper is controlled via Perl and the Device::LabJack module. The program also collects data, triggers a webcam for documentation, and has a rather nice Tk GUI.

UPDATE: Link to Atom Feed on my non-CPAN module is available here:
OO Interface to LabJack Device

Replies are listed 'Best First'.
Re: Who needs LabVIEW?
by robot_tourist (Hermit) on Dec 27, 2006 at 09:42 UTC

    Do we get screenshots? Block diagrams of the system?

    How can you feel when you're made of steel? I am made of steel. I am the Robot Tourist.
    Robot Tourist, by Ten Benson

      Yeah, sure. Over the holiday I am mainly just keeping the system running by keeping the slurry hopper filled with JP-8 and calibrated dirt. But I've got the report to write up, which will have diagrams and such. I'll share a few of those after I've got the report put together.
      Mom!! I taunted Robot Tourist, and now my foot is bleeding!! Can you bring me Happy Fun Ball?

        ?

        How can you feel when you're made of steel? I am made of steel. I am the Robot Tourist.
        Robot Tourist, by Ten Benson

Re: Who needs LabVIEW?
by alpha (Scribe) on Dec 27, 2006 at 14:41 UTC
    Um could you make some screenshots of that bbq ? :)
Re: Who needs LabVIEW?
by Fengor (Pilgrim) on Dec 30, 2006 at 17:27 UTC
    Sounds like a very itneresting piece of candy :) I'm looking forward to screenshots diagrams or code you might wnat to share :)

    --
    "WHAT CAN THE HARVEST HOPE FOR IF NOT THE CARE OF THE REAPER MAN"
    -- Terry Pratchett, "Reaper Man"

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