| 摘要 |
PROBLEM TO BE SOLVED: To provide a gyro device for radio control capable of adjusting easily zero point, and having little noise. SOLUTION: A piezoelectric vibration type angular velocity sensor 1 and a silicon ring type angular velocity sensor 2 are used. Since the output of the angular velocity sensor 2 has a stable zero point, through it has much noise, the zero point is set at first after operation as long as a prescribed time. When the output of the silicon ring type angular velocity sensor 2 agrees with the value thereafter, the output at that time is assumed as zero, and a difference value with the output from the piezoelectric type angular velocity sensor 1 at that time is detected by a differential amplifier 10. The value is integrated by an integrator 11 and returned to an operation amplifier 3. Hereby, an angular velocity signal having a stable zero point and little noise can be acquired, even if a velocity sensor having an unstable zero point is used. COPYRIGHT: (C)2005,JPO&NCIPI
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