Collision monitoring system
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United States of America Patent
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Jun 16, 2009
Grant Date -
Aug 1, 2002
app pub date -
Mar 18, 2002
filing date -
Apr 22, 1992
priority date (Note) -
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Abstract
Disclosed is an improved system and method for sensing both hard and soft obstructions for a movable panel such as a sunroof. A dual detection scheme is employing that includes an optical sensing as the primary means and electronic sensing of motor current as a secondary means. The secondary means utilizes system empirical precharacterization, fast processing algorithms, motor parameter monitoring including both current sensing and sensorless electronic motor current commutation pulse sensing, and controller memory, to adaptively modify electronic obstacle detection thresholds in real time without the use of templates and cycle averaging techniques.
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