Vehicle speed estimation using inductive vehicle detection systems
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United States of America Patent
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Feb 14, 2006
Grant Date -
Mar 25, 2004
app pub date -
Sep 17, 2003
filing date -
Sep 17, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for communicating estimated vehicular speed and length using data obtained from a single wire-loop. The detector card connected to a single wire-loop produces a first bivalent output based on the actual measurement of a vehicle at the wire-loop sensor and synthesizes a second bivalent output to mimic the output of a two wire-loop speed trap. By simulating a second bivalent output at the detector card level, a conventional field controller is capable of estimating the vehicular speed from a single wire-loop sensor.
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