Patent ID: 8438922
Filing Date: 2013-05-14
Classification: G01C

Abstract:
1. An oscillation angular velocity sensor comprising: a first oscillator and a second oscillator each including: the oscillation angular velocity sensor is configured to, when an angular velocity occurs while the detector portion is oscillated, detect the angular velocity according to a variation in an electric capacitance, the variation being caused by change in a distance between the stationary detector electrode and the movable detector electrode moved by a Coriolis force applied to the detector portion, the driver weight of the first oscillator and the driver weight of the second oscillator are directly connected through a driver joint beam, the detector weight of the first oscillator and the detector weight of the second oscillator are directly connected through a detector joint beam, wherein the driver weight of the first oscillator is in a rectangular frame shape, the driver weight of the second oscillator is in a rectangular frame shape, the detector weight of the first oscillator is located inside of the driver weight of the first oscillator, the detector weight of the second oscillator is located inside of the driver weight of the second oscillator, the detector weight of the first oscillator and the detector weight of the second oscillator are higher than the driver weight of the first oscillator and the driver weight of the second oscillator relative to an other surface, which is a reference surface on an opposite side of the one surface of the substrate, the detector joint beam is located at a level higher than a level of the driver weight of the first oscillator and a level of the driver weight of the second oscillator, the detector joint beam straddles the driver weight of the first oscillator and the driver weight of the second oscillator to directly connect the detector weight of the first oscillator with the detector weight of the second oscillator, the driver joint beam is located at a level same as the level of the driver weight of the first oscillator and the level of the driver weight of the second oscillator, and the driver joint beam directly connects the driver weight of the first oscillator with the driver weight of the second oscillator.