Patent ID: 6386033
Filing Date: 2002-05-14
Classification: G01C

Abstract:
An angular velocity sensor comprising:a board in the form of a flat plate; a rotational vibrator rotatable about a center axis of the board, the rotational vibrator being extended to the right and left along a first axis from a central axis vertical to the board and extending through the center thereof, the rotational vibrator being supported over the board at the location of the central axis by rotational supporting beams so as to be rotationally vibrated; a first vibrator located on a right side of the rotational vibrator along the first axis and spaced from the central axis and supported by first supporting beams; a second vibrator located on a left side of the rotational vibrator along the first axis and spaced from the central axis and supported by second supporting beams; rotational vibration generating means for vibrating the second vibrator backward and forward along a second axis direction transverse to the first axis when the first vibrator is vibrated forward and backward along the second axis direction by giving rotational vibration to the rotational vibrator; a first displacement detector for detecting a displacement of the first vibrator vibrated to the right and left when an angular velocity is applied around the central axis of the rotational vibrator in the state that rotational vibration is given to the rotational vibrator by the rotational vibration generating means; and a second displacement detector for detecting a displacement of the second vibrator vibrated to the right and left when an angular velocity is applied around the central axis of the rotational vibrator in the state that rotational vibration is given to the rotational vibrator by the rotational vibration generating means.