| 摘要 |
PURPOSE:To enhance the stability of the titled gyroscope by miniaturizing said gyroscope as a whole and generating well-balanced vibration, by constituting the vibration gyroscope used in order to control the direction and posture of a motion body of a square shaped vibrator formed by adhering a piezoelectric element to respective arms. CONSTITUTION:A first base 13 and a second base 14 each forming a square shape as a whole are formed using a constant elasticity alloy such as a Ni- SPAN-C alloy and respectively used as a first arm 11 and a second arm 12 to constitute a vibrator 10. Herein, the shape of each of the first arm 11 and the second arm 12 is set to a rectangular cross-section but the aspect ratio thereof is slightly differentiated to shift the resonance frequencies in X- and Y- directions to prevent the generation of spurious vibration. Thereafter, PZT or ZnO type piezoelectric elements are adhered to the arms 11, 12 and the vibrator 10 is fixed to a base stand 52 through a support rod 51. By this method, the number of drive and detection parts are increased and a vibration gyroscope having high sensitivity and reduced in spurious offset output is obtained. |
