Acceleration detection type gyro device

In an acceleration-detecting type gyro apparatus comprising:

• a gyro case having a Z axis along the direction of a central axis, and X and Y axes perpendicular to the Z axis;
• a gyro rotor supported within the gyro case by electrostatic supporting force such that the gyro rotor is not in contact with the gyro case, and having a spin axis in said central axis direction;
• a plurality of electrostatic supporting electrodes spaced apart from the gyro rotor, and to which control voltages are applied;
• a rotor drive system for rotating the gyro rotor around said spin axis at high speed;
• a displacement-detection system for detecting linear displacements in the X-axis, Y-axis, and Z-axis directions, and rotational displacements around the Y and X axes of said gyro rotor;
• and
• a restraining control system including a feedback loop for correcting said control voltages so that displacements detected by the displacement-detection system become zero, the acceleration-detecting type gyro apparatus characterized in that
• said gyro rotor is annular-shaped, and said electrostatic supporting electrodes are disposed in the manner of surrounding the gyro rotor.