>> I'm working on a security application that detects a moving object (usually
>> a human  ...) in an outdoor space measuring approx 200 x 500 ft. Output are
>> x/y (maybe even z) coordinates, which are fed to a  x/y/z- mount with a
>> video camera on it. Mount gets coordinates, aims, zooms in, focuses -
>> smile!. Video camera and x/y/z mount are done. All I need is the ranging
>> module. Ultrasound is out of the picture because of the distances involved.
>> Motion detectors etc. don't work, because I need the exact location of the
>> object, not just presence detection.
>>

What about some image processing to detect the movement using the camera
you already have?  (I guess it depends on the Field of View)..

PC based frame grabbers are 'relatively' cheap now days, and the motion
detection algorithm could be simple frame by frame comparison, execution
times should not be too much of a constraint. Once you have determined the
center of movement you could then zoom/autofocus and track..

Maybe, some cross-hairs on the display.......!!



Ray Gardiner (DSP Systems) ray@dsp-systems.com http://www.dsp-systems.com
private email to:- ray@netspace.net.au