发明名称 |
Varying apparent mass accelerometer |
摘要 |
A varying apparent mass accelerometer 1 for detecting earthquake vibrations includes a frame 2 vibrating with an earthquake wave, a mass 51 supported on the frame 2 via a spring 52, electrodes 6 and 7 disposed above and below the mass 51, power sources 8 each applying a voltage across the electrodes 6 and 7, and a capacitance detector 9 for detecting changes in capacitance between the electrodes. The accelerometer 1 exerts a signal only when an acceleration exceeds a threshold.
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申请公布号 |
US5604313(A) |
申请公布日期 |
1997.02.18 |
申请号 |
US19940346263 |
申请日期 |
1994.11.23 |
申请人 |
TOKYO GAS CO., LTD. |
发明人 |
CAHILL, SEAN S.;NAKAMURA, KENICHI |
分类号 |
B81B3/00;G01H11/06;G01P15/08;G01P15/125;G01V1/00;(IPC1-7):G01P15/00;H01G7/00 |
主分类号 |
B81B3/00 |
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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