Integrated tilt sensor
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United States of America Patent
Stats
-
Aug 14, 2007
Grant Date -
Oct 19, 2006
app pub date -
Apr 13, 2005
filing date -
Apr 13, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A tilt sensor having a printed circuit board disposed in a direction normal to a reference plane for measuring a tilt angle with a pair of electrodes formed on a first surface of the printed circuit board. A cover is affixed to the printed circuit board and creates a cavity between the cover and the printed circuit board with a predetermined gap between the cover and the pair of electrodes, the cover acting as a common electrode to the pair of electrodes to create a pair of capacitors. An inert liquid is contained in the cavity, the surface level of the inert fluid varying according to the tilt angle of the reference plane. A signal processing circuit is formed on a second surface of the printed circuit board that produces an output signal corresponding to a difference in capacitance between the two capacitors as a tilt angle detection output.
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