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Force rebalancing and parametric amplification of MEMS inertial sensors
Force rebalancing and parametric amplification of MEMS inertial sensors
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机译:MEMS惯性传感器的力平衡和参数放大
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摘要
MEMS devices and methods for measuring Coriolis forces using force rebalancing and parametric gain amplification techniques are disclosed. A MEMS inertial sensor can include one or more proof masses, at least one sense electrode positioned adjacent to each proof mass, a number of torquer electrodes for electrostatically nulling quadrature and Coriolis-related proof mass motion, and a number of torquer electrodes for producing a pumping force on the proof masses. Force rebalancing voltages can be applied to some torquer electrodes to electrostatically null quadrature and/or Coriolis-related proof mass motion along a sense axis of the device. A pumping voltage at approximately twice the motor drive frequency of the proof masses can be used to pump the proof masses along the sense axis for increasing scale factor.
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