Vibration sensor for a portable device including a damping arrangement to reduce mechanical resonance peak of sensor
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United States of America
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Mar 24, 2020
Grant Date -
Dec 20, 2018
app pub date -
Aug 14, 2018
filing date -
Aug 14, 2018
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A vibration sensor having a moveable mass being suspended in a suspension member and being adapted to move in response to vibrations or accelerations. The moveable mass and the suspension member move together as a single element. The vibration sensor includes a damping arrangement having a damping fluid or gel. The moveable mass is arranged to interact directly or indirectly with the damping fluid or gel in order to reduce a mechanical resonance peak of the vibration sensor. The damping fluid or gel has a viscosity between 1000 cP and 100000 cP, is kept in position by capillary forces only, and is stable over time without tending to evaporate.
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