发明名称 |
Means for adjusting the sensitivity of a crystal detector |
摘要 |
A twin-transducer seismic detector includes a hollow housing closed at each end by a diaphragm-type transducer. A deformable retaining member is pressed against the perimeter of each transducer. An adjustable force is applied to at least one of the deformable members to cause the member to flatten against the transducer. As the deformable member becomes flattened, it reduces the effective area of the transducer and hence alters its compliance and sensitivity. The applied force is adjusted so as to match the sensitivity of one transducer to that of the other transducer.
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申请公布号 |
US4395908(A) |
申请公布日期 |
1983.08.02 |
申请号 |
US19810296769 |
申请日期 |
1981.08.27 |
申请人 |
WESTERN GEOPHYSICAL CO. OF AMERICA |
发明人 |
SHOPLAND, ROBERT C. |
分类号 |
B06B1/06;G01P15/09;(IPC1-7):G01P15/09 |
主分类号 |
B06B1/06 |
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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