Patent ID: 8490486

Claim:
A motion detector comprising: a chamber having a front plate and a back plate opposite to the front plate, each of the front plate and the back plate having a first through hole and a plurality of second through holes defined therein, the second through holes surrounding the first through hole, a size of the first though hole being greater than that of each of the second through holes, the first through hole of the front plate being aligned with the first through hole of the back plate in a first direction, the second through holes of the front plate being aligned with the respective second through holes of the back plate in the first direction; a resilient cantilever arm arranged in the chamber, the resilient cantilever arm having a free end located at a center of the chamber; a gimbal joint; an air bearing slider moveably coupled to the free end of the resilient cantilever arm via the gimbal joint; and at least one piezoresistive sensor attached on the air bearing slider for sensing pitch, roll and yaw associated with the motion of the motion detector.