Patent ID: 6134961
Filing Date: 2000-10-24
Classification: G01C

Abstract:
An angular velocity sensor having a center comprising:a loop spring beam which is flexible in an x-axis and a y-axis passing through the center of the sensor, said loop spring beam being supported by floating support members for being vibrated in directions extending along an xy-plane relatively to a substrate;oscillation means for driving at least one point of said loop spring beam which intersects said x-axis or y-axis to vibrate in a direction in which said one axis extends;a first drive frame and a second drive frame which are continuous with a respective intersection point of said loop spring beam with said x-axis, said first drive frame and second drive frame being located at positions symmetric with respect to said y-axis, and being supported afloat for movement relative to the substrate by support members that are flexible in the direction in which the x-axis extends;a first vibrator disposed in said first drive frame and continuous with spring beams that are flexible in the y-direction, the first vibrator being continuous with said first drive frame;a second vibrator disposed in said second drive frame and continuous with spring beams that are flexible in the y-direction, the first vibrator being continuous with said second drive frame;first displacement detection means for detecting a y-directional vibration of said first vibrator; andsecond displacement detection means for detecting a y-directional vibration of said second vibrator.