Patent ID: 8456179
Filing Date: 2013-06-04
Classification: G01C

Abstract:
1. An angular velocity detection device including an oscillating body displaceable in a first direction and a second direction which orthogonally intersect each other, and detecting an angular velocity from a change in an electrostatic capacity due to a displacement of the oscillating body in the second direction in a state in which the oscillating body is oscillated in the first direction, the angular velocity detection device comprising: drive means which oscillates the oscillating body in the first direction by an electrostatic force corresponding to a drive signal; a carrier signal application unit which applies a carrier signal to the oscillating body; and a capacity detection unit which detects a displacement of the oscillating body as a displacement modulation signal which is a change in the electrostatic capacity synchronized with the carrier signal, wherein a frequency of the drive signal output by the drive means and a frequency of the carrier signal output by the carrier signal application unit are set so as to be generated at a frequency ratio which allows a higher harmonic of the drive signal multiplied by an odd number not to interfere with the displacement modulation signal.