Pedestrian impact sensing apparatus for a vehicle bumper
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United States of America Patent
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Feb 19, 2008
Grant Date -
Apr 26, 2007
app pub date -
Sep 28, 2005
filing date -
Sep 28, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An impact sensing apparatus includes a laterally extending air channel within a block of foam or other crushable medium disposed between a bumper fascia and a rigid bumper frame element, and one or more airflow sensors for detecting airflow within the air channel. The air channel may be defined by a flexible hollow tube embedded within the crushable medium or by a molded-in air cavity in cases where the crushable medium is formed by molding. The measured airflow provides a measure of crush rate, and two or more airflow sensors may be distributed within the air channel to optimize impact detection response time and to identify the impact location.
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