PURPOSE: To separate a component corresponding to a Coliolis force and a component corresponding to a disturbing inertial force with high accuracy by weighting and adding deviation detection signals obtained by detecting independently forces operating on a couple of mass elements which are driven symmetrically.
CONSTITUTION: The piezoelectric elements 1a and 1b are driven cyclically in the opposite directions to make the Coliolis force operate, and detect the forces operating on them to generate the deviation detection signals 1a' and 1b'. The signals 1a' and 1b' contain components corresponding to inertial forces, disturbing inertial forces, etc., accompanying the driving. Preamplifiers 2a and 2b convert the signals 1a' and 1b' into low-impedance voltage signals 2a' and 2b'. An adder 4 weight and adds the signals 2a' and 2b'. A signal processing circuit 3 extracts and processes the component corresponding to the Coliolis force from the output signal of the adder 4 to generate an output proportional to an input angular velocity. Thus, the sensitivity variance of the elements 1a and 1b is compensated by the adder to compose the differential response between operating forces to both elements equally, thereby canceling the components corresponding to the disturbing inertial forces almost completely.
KIMURA RYO
HAYASHI YOSHITAKE
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