DUAL MODE MEMS SENSOR
First Claim
1. A system for determining acceleration along a motor axis of a MEMS gyroscope comprising:
- a processor having;
a notch filter to remove a sinusoid from an instantaneous voltage from a motor pick up of the MEMS gyroscope;
a memory bus for random access to data stored in a processor-readable memory; and
a processor-readable memory in operative engagement with the memory bus, the processor-readable memory containing data including;
a model relating at least one instantaneous voltage in a remaining instantaneous voltage to an acceleration of a proof mass along the motor axis; and
instructions to the processor including;
a routine to instruct the processor to compare the at least one instantaneous voltage in the model to the remaining instantaneous voltage.
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Accused Products
Abstract
A system and method for determining acceleration along a motor axis of a MEMS gyroscope includes a processor. The processor includes a notch filter to remove a sinusoid from an instantaneous voltage from a motor pick up of the MEMS gyroscope. A memory bus allows random access to data stored in a processor readable memory. A processor-readable memory in operative engagement with the memory bus allows access to the processor-readable memory containing data. The data includes a model relating at least one instantaneous voltage in a remaining instantaneous voltage to an acceleration of a proof mass along the motor axis. Instructions to the processor include a routine to compare the at least one instantaneous voltage in the model to the remaining instantaneous voltage.
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Citations
20 Claims
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1. A system for determining acceleration along a motor axis of a MEMS gyroscope comprising:
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a processor having; a notch filter to remove a sinusoid from an instantaneous voltage from a motor pick up of the MEMS gyroscope; a memory bus for random access to data stored in a processor-readable memory; and a processor-readable memory in operative engagement with the memory bus, the processor-readable memory containing data including; a model relating at least one instantaneous voltage in a remaining instantaneous voltage to an acceleration of a proof mass along the motor axis; and instructions to the processor including; a routine to instruct the processor to compare the at least one instantaneous voltage in the model to the remaining instantaneous voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for determining an acceleration along the motor axis of a MEMS gyroscope comprises:
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receiving a motor pick off instantaneous voltage; filtering a proof mass oscillation from the instantaneous voltage to generate a remaining signal; comparing the remaining signal to a model relating instantaneous voltage to displacement of a proof mass along the motor axis; and deriving an acceleration based upon the displacement of the proof mass. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A processor for deriving an acceleration along a motor axis of a MEMS gyroscope, the processor comprising:
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a notch filter receiving an instantaneous voltage from a motor pick off of the MEMS gyroscope to generate a remaining signal; a memory bus retrieving data from a processor-readable memory in accord with the received instantaneous voltage; and a look-up engine for transforming the remaining signal into an acceleration signal indicative of acceleration along the motor axis. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification