Rotor type orientation sensor having plural emitters and two receivers
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United States of America Patent
Stats
-
Apr 17, 2012
Grant Date -
Jun 2, 2011
app pub date -
Nov 30, 2009
filing date -
Nov 30, 2009
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rotor type orientation sensor includes a housing, a plurality of light emitters, two light receivers and a rotor. The housing has a circular tunnel and a plurality of first openings connecting to the tunnel and two second openings located on two sides of the first openings. The light emitters emit light into the tunnel through the first openings. The light receivers receive light from the tunnel through the second openings. The rotor is arranged in the tunnel, whereby while the rotor type orientation sensor is tilting, the rotor rotates toward the direction of gravity force, at least a portion of light emitted from the light emitters is blocked by the rotor, one of the light receivers is blocked by the rotor, the light receivers can respectively receive light with predetermined intensity and correspondingly output electric signals with predetermined strength.
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