Method and apparatus for sensing impact between a vehicle and an object
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United States of America Patent
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app pub date -
Sep 19, 2005
filing date -
Apr 8, 2003
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Abandoned
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Abstract
The invention relates to the apparatus for and a method of sensing impact between a vehicle and an object and particularly between a pedestrian and the front bumper (12) of a vehicle. An optical fiber array (14) extends along the bumper (12) and the array (14) has sensors spaced along the bumper (12). A sensor comprises light loss areas spaced peripherally and axially on a fiber. An impact distorts the sensors, modulating light transmitted along the fiber or fibers. A signal is produced which is processed by a signal processor and an output signal generated. The output signal is used to actuate a safety device, such as elevating the vehicle hood to increase clearance between hood and engine, to reduce the severity of any injuries.
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