Road-ice detecting sensor, method for installing same, and road-ice detecting method
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United States of America Patent
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Apr 15, 2008
Grant Date -
Sep 22, 2005
app pub date -
Mar 17, 2005
filing date -
Mar 17, 2004
priority date (Note) -
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Abstract
A road-ice detecting sensor includes: a temperature sensing member of T shape made of a highly heat conductive metal, having a temperature sensor to be grounded onto a road and a fin part erected from this temperature sensor; an optical fiber having an FBG bonded onto the fin part of the temperature sensing member; and a case having a heat insulating member surrounding the fin part of the temperature sensing member and the optical fiber. A plurality of number of the read-ice detecting sensors are installed on a road, connected to one another via an optical cable. Pulsed light is launched into one of the ends of the optical cable, and beams of reflected light from the respective road-ice detecting sensors are received to measure the road temperature.
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