Patent ID: 8601872

Claim:
A vibrating gyroscope comprising: a ring-shaped vibrating body having a uniform plane; a leg portion flexibly supporting the ring-shaped vibrating body and having a fixed end; a fixed potential electrode; and a plurality of electrodes formed on the plane with a piezoelectric film sandwiched between an upper-layer metallic film and a lower-layer metallic film in a thickness direction thereof, wherein the plurality of electrodes include: (1) when N is a natural number of 2 or more, a group of driving electrodes for exciting an in-plane primary vibration of the ring-shaped vibrating body in a vibration mode of cos Nθ, which are disposed (360/N)° apart from each other in a circumferential direction; and (2) a group of detection electrodes for detecting a secondary vibration in a vibration mode of cos (N+1)θ generated when an angular velocity is applied to the ring-shaped vibrating body, and, when one of the driving electrodes is set as a reference driving electrode and S=0, 1, . . . , N (hereinafter true), the group of detection electrodes having an electrode disposed [{360/(N+1)}×S]° apart from the reference driving electrode and/or an electrode disposed [{360/(N+1)}×{S+(½)}]° apart from the reference driving electrode, and each of the driving electrodes is disposed in the plane and on a first electrode disposition portion in a region from an outer peripheral edge of the ring-shaped vibrating body to a vicinity of the outer peripheral edge and/or a region from an inner peripheral edge thereof to a vicinity of the inner peripheral edge, and each of the detection electrodes is disposed on a second electrode disposition portion that is not electrically connected to the first electrode disposition portion.