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Long Range RFID

Discussion in 'Electronic Design' started by Gavin Davidson, Jan 31, 2004.

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  1. I am looking for a solution for a client of mine that makes concrete
    pipe (large diameter) and stores it outside in a 65 acre yard.

    What I'd like to do is tag each piece of pipe (you might have to glue
    the tag on...) and then be able to scan the yard from a central
    location to locate, value inventory, monitor movement etc.

    Anyone got any suggestions?

    Thanks

    Gavin Davidson
     
  2. Jim Thompson

    Jim Thompson Guest

    You're going to have problems at ranges over about 25'.

    You might contact SAVI Technology, http://www.savi.com/

    in Sunnyvale for some insight.

    ...Jim Thompson
     
  3. I read in sci.electronics.design that Gavin Davidson
    What is the greatest distance an object can be from the monitoring
    point?

    Unless you have line-of-sight to each object, you are likely to need an
    active radio tag system, which probably means battery-operated. Doable,
    but not elegant.
     
  4. GrahamH

    GrahamH Guest

    This seems too large an area to cover with fixed equipment. However, could
    you mount readers on the vehicles that move the pipes? An 802.11 wireless
    network would allow the vehicle-mounted readers to download tag data
    periodically to an inventory tracking system. Include GPS to log the vehicle
    location for each tag scan. You should get multiple reads from each tag for
    various vehicle locations. This should allow you to interpolate the actual
    pipe locations quite accurately.

    Graham
     
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