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Flight Management Unit sensors Part 2

The Agilent ADNS-2610 optical mouse sensor IC

 

 

 

 

 


 

" Optic Flow" sensors

Agilent ADNS-2610 optical mouse sensor

Although the 18 x 18 element CMOS photosensor was developed for use in motion sensing for mice, this same IC can be used with a lens to monitor the motion of the UAV over terrain in both X and Y direction. The movement of the underlying image across the CMOS sensor array is referred to as the " optic flow" .

Download data sheet

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Applications

  • ground speed detector (height needs to be known from an altimeter)
  • an indication of the tilt of the UAV
  • an indication of the height above ground (if the ground speed is known from GPS)
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    Quadrant photodiodes

    Centronic Q47-5T

    from http://www.centronic.co.uk/products_electro_products_silicon.asp  

    The four quadrant pointing angle detector is used with a lens to detect when the leans plus four quadrant detector is pointing at a light source, such as the sun, or a laser spot. When the detector plus lens assembly is pointing directly at the light souce, the photocurrent outputs from each of the four detectors is equal. In a Flight Management Unit, the four quadrant detector could point at the sun or moon, and the changes in the pointing angle would be indicative of a change in attitude of the UAV.

    Download data sheet

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    Applications

    Use a four quadrant detector pointing at the sun or moon to detect:

    • locate the sun or moon to determine:
    • yaw, pitch and roll
    • aircraft attitude
    • locate a laser spot

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    Thermopile sensor

    Melexis MLX90247 thermopile detector

    from http://www.melexis-rf-ics.com/prodfiles2/0002500_90247_1.pdf

    Thanks to Josh Levine for bringing this thermopile sensor  to our attention.

    - from 1033_paparazzi.pdf on "Build you own UAV"

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    Applications:

    • horizon sensing
    • engine temperature sensing

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