Browsing by Author "Waugh, L."

Now showing 1 - 1 of 1
  • Thumbnail Image
    ItemOpen Access
    Objective speckle velocimetry for autonomous vehicle odometry
    (Osa Optical Society of America, 2012-05-31T00:00:00Z) Francis, Daniel; Charrett, Thomas O. H.; Waugh, L.; Tatam, Ralph P.
    Speckle velocimetry is investigated as a means of determining odometry data with potential for application on autonomous robotic vehicles. The technique described here relies on the integration of translation measurements made by normalized cross-correlation of speckle patterns to determine the change in position over time. The use of objective (non-imaged) speckle offers a number of advantages over subjective (imaged) speckle, such as a reduction in the number of optical components, reduced modulation of speckles at the edges of the image, and improved light efficiency. The influence of the source/detector configuration on the speckle translation to vehicle translation scaling factor for objective speckle is investigated using a computer model and verified experimentally. Experimental measurements are presented at velocities up to 80 mms=1 which show accuracy better than 0.4%.