Patent ID: 8225655
Filing Date: 2012-07-24
Classification: G11B

Abstract:
1. An altitude sensor configured to detect an air flow generated by a component of a system, comprising: a support frame having an upper shield and a lower shield opposite the upper shield; a sensor unit mounted in the support frame, the sensor unit comprising: a beam cantilevered horizontally in the support frame; a damper attached to a free end of the beam and configured to move up and down in response to the air flow, which drives the beam to move up and down accordingly; at least orie PZT layer formed on a surface of the beam, the at least one PZT layer being configured to generate a voltage corresponding to a movement of the beam; and at least one connection pad operably coupled to the at least one PZT layer, the at least one connection pad being suitable for outputting the voltage; wherein distances from the damper to the upper shield and the lower shield are less than those from the beam to the upper shield and the lower shield, respectively; wherein the air flow is related to altitude, wherein the support frame further comprises two side shields, the two side shields respectively connect corresponding end portions of the upper shield and the lower shield, one of the two side shields has a notch formed therein, and an end of the beam opposite the free end is inserted into he notch.