| 摘要 |
The appts. includes a disc (12) constructed from piezoelectric material and is seated on a base of low expansion which bears thirty-two electrodes on its surface. Exciting electrodes (Em+,Em-), bearing potentials of opposite polarity, are designed to produce a motor field and 4R type vibrations in the disc. Electrodes (Dm+,Dm-) detect the motor field but not any vibrations due to Coriolis acceleration and they are used for regulation. Electrodes (Dc+,Dc-) detect the Coriolis field which is compensated by further electrodes (Ec+,Ec-). The exciting and compensating electrodes are interleaved with the detecting electrodes but separated from them by guarding electrodes (26) at earth potential. The excitation electrodes provide radial nodes of the fourth order and are dependent on a predetermined source. The source induces radial nodes having a frequency less than the nodes at the tangential node.
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