发明名称 |
Apparatus for detecting the resonant frequency of a bone |
摘要 |
An apparatus for detecting resonant frequency of bones has an electro-mechanical transducer arranged for application to the external skin surface covering a bone, the transducer being in a feed-back circuit with an amplifier and phase shifter having a unity gain and a loop phase of zero. The feed-back circuit is connected to a display comprising an A-D converter and a digital display. The apparatus displays the lowest order transverse mode set up in a bone. In a further embodiment the transducer is arranged to pierce the skin and to be in direct contact with a bone. The transducer has a coupling rod and a detector which may be both positioned at the same station on a bone or at spaced stations along a bone.
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申请公布号 |
US4799498(A) |
申请公布日期 |
1989.01.24 |
申请号 |
US19850792470 |
申请日期 |
1985.10.29 |
申请人 |
KENT SCIENT IND PROJECTS;IND PROJECT LTD |
发明人 |
COLLIER, RICHARD J. |
分类号 |
A61B5/103;G01H13/00;(IPC1-7):A61B5/10 |
主分类号 |
A61B5/103 |
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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