| Flight Control Unit sensors: Part 2 | - FMU Sensors 2 |
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" .
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.
Use a four quadrant detector pointing at the sun or moon to detect:
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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