| 摘要 |
PURPOSE:To detect with a high accuracy an angular velocity of a rotating body by detecting a magnitude of the angular velocity and a direction of the angular velocity, from a ratio of a detecting signal obtained from a detecting element and a driving signal of the detecting element, and from a phase relation of the detecting signal and the driving signal, respectively. CONSTITUTION:A detecting element 1 has a driving part 2 and a detecting part 3, and rotates as one body with a rotating body. A driving circuit 4 supplies a driving signal VI to the driving part 2, and vibrates the detecting part 3. A signal VS which is detected 5 in accordance with a Corioli's force from the detecting part, generated thereby is brought to a full-wave rectification 11 through an amplifying circuit 9, and a DC voltage VS3 is outputted. An amplitude ratio of the voltage VS3, and a DC voltage VI4 obtained by half-wave-rectifying 10 and smoothing 13 the signal VI is detected by a logarithmic amplifying circuit (LAMP) 17, and on the other hand, as for the signal VI, the frequency is detected by a LAMP 16. An output VI3 of the circuit 17 and an output VL4 of the LAMP 16 are added 18, and the adding part 18 outputs a signal V01 corresponding to a magnitude of an angular velocity of the rotating body. On the other hand, a phase of an output VI3 of the half-wave rectifying circuit 10 and an output VS2 of the circuit 9 is detected 14, and a phase detecting circuit 14 outputs a signal VP for showing a direction of an angular velocity. |
