Roadway sensor with improved insulated signal carrying wires
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jun 1, 2004
Grant Date -
N/A
app pub date -
Sep 1, 2000
filing date -
Sep 1, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A vehicular roadway sensor comprising a conductive elastomeric housing having a sensor wire groove and one or more signal wire in the sensor wire groove, the sensor wire groove comprised of an airgap portion and a sensing wire portion for receiving and maintaining one or more insulated sensing wires in a fixed relation to establish a residual charge relationship with the conductive elastomeric housing so that when the fixed relationship is changed by the wheels of a vehicle on the housing a signal voltage is induced in the sensor, and one or more insulated signal carrying conductors connected to the one or more sensor wires, respectively. The one or more insulated signal carrying conductors are adhesively mounted in the conductive elastomeric housing so that vehicular traffic traversing the conductive elastomeric housing does not induce significant signals in the one or more insulated signal carrying conductors and wherein each insulated signal-carrying wire is covered with a rubber insulation so that minimal signals are generated in the signal-carrying conductors by heavy trucks thereby providing a high margin or tolerance for signal discrimination.
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