发明名称 |
Method for calculating transducer capacitance to determine transducer temperature |
摘要 |
A method for calculating the capacitance of a transducer (C<SUB>0</SUB>) without knowing the exact resonance frequency of a transducer/blade combination is achieved by sweeping across a broad frequency range which contains resonant and non-resonant frequencies where C<SUB>0 </SUB>can be measured. A pre-defined frequency range is set independently of the resonance frequency of a specific transducer/blade combination. C<SUB>0 </SUB>of the transducer/blade is measured at several different frequencies within the pre-defined frequency range to ensure that invalid C<SUB>0 </SUB>measurements are disregarded, and the temperature of the transducer is calculated based on valid C<SUB>0 </SUB>measurements. The determined transducer temperature, based on C<SUB>0 </SUB>measurements, can be used to optimize performance and/or provide a safety shutdown mechanism for the generator.
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申请公布号 |
US7077853(B2) |
申请公布日期 |
2006.07.18 |
申请号 |
US20010975390 |
申请日期 |
2001.10.10 |
申请人 |
ETHICON ENDO-SURGERY, INC. |
发明人 |
KRAMER KENNETH S.;WIENER EITAN T.;DONOFRIO WILLIAM T.;HOUSER KEVIN;STULEN FOSTER B. |
分类号 |
A61B17/32;A61B17/00 |
主分类号 |
A61B17/32 |
代理机构 |
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地址 |
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