Altitude sensing systems for flying height adjustment
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United States of America Patent
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Jul 24, 2012
Grant Date -
Jun 18, 2009
app pub date -
Dec 18, 2007
filing date -
Dec 18, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An altitude sensor includes a support frame and a sensor unit mounted in the support frame. The support frame has an upper shield and a lower shield. The sensor unit includes a beam and a damper. The damper is configured to move up and down in response to the air flow, which drives the beam to move up and down accordingly. Distances from the damper to the upper shield and the lower shield are less than those from the beam to upper shield and the lower shield. The altitude sensor possesses super specific properties such as unlimited sensitivity to flying height because of no size constraints and unchanged sensitivity under a changing environment, a selfprotective mechanism to resist deformation in case of an accident, easy manufacture process as well as low production cost. The present invention also discloses an altitude sensor for use in a disk drive device and a disk drive device with the altitude sensor.
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