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  • Author Author: screamingtiger
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QuadCOP - More construction Pictures

screamingtiger

Previous Posts Here:

http://www.element14.com/community/community/design-challenges/sci-fi-your-pi/blog/authors/screamingtiger?ICID=DCH-SciFiPi-challengers

 

I have mounted the camera in the head, and have the head moving!  I don't have the servo secure yet so that is why it is wobbly.  I posted a vid below on a preview of how it works.  I just controlled it with my radio but in flight the Raspberry Pi (RPFS) will use it to "Scan" around.

 

Cut a hole for they eye

 

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Pi camera mounted with hot glue

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lens pokes through

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Servo, needs hard wood mounts, just held on with glue for now.

 

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A preview.  Note the plastic eye cover, made from a Christmas Ornament.

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Watch the Vid of the head.

 

  • in reply to balearicdynamics

    Well since I have a bit more time before I fly I may give the xtrinsic board one more shot.  I was playing with the pressure sensor.  Had a hard time not getting it to lock up, but I was using the code they provide in Python.

     

    I agree GPS is not going to be perfect but its what I got.  The sonic sensors will keep it from hitting the ground.

  • in reply to Problemchild

    What I have experienced until now with drones, is that the aspect that seems more complex, to make them flying, as a matter it is the less problematic and simple. True it is easier than making fly a traditional aero model. Then when the aero model flies 95% of the effort is done while when a drone flies (almost any thing included a rick can fly as drones) it is only done 10%-20% of the job.

     

    Enrico

  • in reply to balearicdynamics

    Yeah the inputs from all the sensors are used to compensate for the GPS inaccuracy. Also they have an elaborate calibration procedure for those sensors at the beginning of the flight . finally of course  the craft doesn't need to to really know where it is in absolute terms but relative to the start so if it's wrong it doesn't matter as long as it's consistently wrong in it's measurements.

  • in reply to Problemchild

    As a matter of fact, I have serious suspects about the reliability of the GPS vertical accuracy and the best solution maybe an altimetric sensor. The problem of the height stabilisation was one of the bigger issues in all the generations of the AR-Drone devices as I have explained in a post above.

     

    Some other high profile (and very high price) drones, including the DJI Phantom if I am not wrong, consider also the parameters returned by a very reactive accelerometers that is used to compensate the z-axis offset of a given altitude based on the small movements detected and their relative speed.

     

    Enrico

  • in reply to mcb1

    The promised GPS vertical accuracy is supposedly quite poor however most devices that claim reasonable accuracy on their "z" axis  actually combine the barometric sensor data to give a more accurate final "GPS" value .