Radio frequency transponders embedded in surfaces
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United States of America Patent
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N/A
Issued Date -
Oct 16, 2008
app pub date -
Apr 11, 2007
filing date -
Apr 11, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Objects containing radio frequency transponders, such as RFID tags, can be encoded with information and mixed with a substance. The mixed objects and substance can be applied to a surface such as a road, such that a vehicle traveling over the surface may later read encoded information stored in the transponders. In one variation, the objects may include spherical marbles that are mixed with asphalt and embedded in a road surface. An apparatus includes components arranged to receive multiple objects, encode transponders contained in the objects, and mix them with a substance such as asphalt or concrete. Objects may include spheres having helical antenna elements or antenna elements formed on an outer surface thereof. A vehicle may be configured with a reader and antennas arranged to read transponders embedded in a roadway surface.
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