发明名称 |
PIEZOELECTRIC VIBRATORY GYROSCOPE UTILIZING AN ENERGY-TRAPPING VIBRATIONMODE |
摘要 |
A piezoelectric vibratory gyroscope utilizing an energy-trapping vibration mode comprises a piezo-electric plate having a principal surface and polarized in a thickness direction, and first through n-th electrodes (n being an integer not smaller than three) formed in a generally central area of the principal surface at positions corresponding to first through n-th vertexes of a polygon having n angles. When the piezoelectric plate is excited in the energy-trapping vibration mode of a primary vibration, rotation of the piezoelectric plate around an axis perpendicular to the principal surface of said piezoelectric plate produces the Coriolis force to excite a secondary vibration which induces electric voltages at the first through the n-th electrodes. A voltage difference is detected for at least two of the first through the n-th electrodes. |
申请公布号 |
CA2208369(C) |
申请公布日期 |
2003.12.02 |
申请号 |
CA19972208369 |
申请日期 |
1997.06.20 |
申请人 |
TOKIN CORPORATION |
发明人 |
YOSHIDA, TETSUO;ABE, HIROSHI;WAKOU, NAOKI;WATANABE, HIROSHI |
分类号 |
G01C19/56;G01P9/04;H03H9/17;H03H9/54;H03H9/56;(IPC1-7):G01C19/56;G01P3/44 |
主分类号 |
G01C19/56 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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