Patent ID: 6898972
Filing Date: 2005-05-31
Classification: G01C,Y10T

Abstract:
1. A micromechanical rotation speed sensor comprising: a first vibration element which is swivelled about a first axis, a second vibration element which is swivelled about a second axis, said second axis oriented perpendicular toward the first axis; an excitation unit for placing the first vibration element in vibration about the first axis; a read out unit for recording vibrations of the second vibration element about the second axis; and at least two additional mass elements fastened on the first vibration element which are oriented symmetrically in relation to a plane defined by the first and second axis, and a gap separation between said first vibration element and a fixed member for an excitation vibration of the first vibration element is greater than a gap separation between said second vibration member and said fixed member for a read out vibration of the second vibration element; and a top portion hermetically sealed with said fixed member wherein each of said top portion and fixed member contain a recess for a respective one of said two additional mass elements.