| 摘要 |
<p>PURPOSE:To improve the precision by providing a driving means, which rotates a piezoelectric ceramic substrate around an axis which passes symmetrical points and is vertical to the surface of the substrate, and a means which processes the electric output generated by the piezoelectric effect of two cut parts of the substrate. CONSTITUTION:A piezoelectric ceramic substrate 1 having cantilever-shaped cut parts 2a and 2b is rotated around the Z axis in an angular velocity omega by a driving part 4 to generate a Coriolis force fc. This force fc is obtained by converting the physical intersection at right angles between X and Y directions of an absolute angular velocity to the time intersection at right angles with a phase difference pi/2 in response to variations of X-direction and Y-direction components of the velocity of cut parts 2a and 2b and subjecting this intersection to sine wave modulation and is converted to an electric charge on cut parts 2a and 2b. This electric charge is converted to a voltage signal by a charge amplifier consisting of an operational amplifier 3a, a resistance 3b, and a capacitor 3c, and an output corresponding to the absolute angular velocity is generated by a signal processing part 5.</p> |
