Use of multiple internal sensors for measurements validation
First Claim
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1. A packaged multi-sensor device for measuring and validating one or more inertial signals, comprising:
- a plurality of sensors arranged to measure at least first, second, and third inertial signals in different domains, the plurality of sensors comprising a first Micro-Electro-Mechanical Systems (MEMS) sensor device for measuring the first inertial signal in a first domain, a second MEMS sensor device for measuring the second inertial signal in a second different domain, and a third MEMS sensor device for measuring the third inertial signal in a third different domain; and
a processing unit for generating first and second estimated values for the first inertial signal based on, respectively, the second and third inertial signals, and for comparing the first and second estimated values for the first inertial signal to the first inertial signal in order to validate the first inertial signal,where the processing unit generates the first estimated value by computing a first estimated x-axis linear acceleration value from the second inertial signal which comprises a measured roll angular velocity value Ω
X, andwhere the processing unit generates the second estimated value by computing a second estimated x-axis linear acceleration value from the third inertial signal which comprises a measured y-axis linear acceleration value.
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Abstract
A microcontroller-based method and apparatus are described for measuring motions signals (301) with a plurality of inertial sensors (302-304) contained within a device package housing and validating (420) a first measured motion signal (e.g., ΩX) by generating at least a first estimated value ΩX for the first motion signal (e.g., 419) based on at least a second measured motion signal (e.g., AY) and for comparing the first estimated value for the first motion signal (419) to the first measured motion signal ΩX in order to validate the first measured motion signal ΩX.
27 Citations
16 Claims
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1. A packaged multi-sensor device for measuring and validating one or more inertial signals, comprising:
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a plurality of sensors arranged to measure at least first, second, and third inertial signals in different domains, the plurality of sensors comprising a first Micro-Electro-Mechanical Systems (MEMS) sensor device for measuring the first inertial signal in a first domain, a second MEMS sensor device for measuring the second inertial signal in a second different domain, and a third MEMS sensor device for measuring the third inertial signal in a third different domain; and a processing unit for generating first and second estimated values for the first inertial signal based on, respectively, the second and third inertial signals, and for comparing the first and second estimated values for the first inertial signal to the first inertial signal in order to validate the first inertial signal, where the processing unit generates the first estimated value by computing a first estimated x-axis linear acceleration value from the second inertial signal which comprises a measured roll angular velocity value Ω
X, andwhere the processing unit generates the second estimated value by computing a second estimated x-axis linear acceleration value from the third inertial signal which comprises a measured y-axis linear acceleration value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A packaged multi-sensor device for measuring and validating one or more inertial signals, comprising:
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a plurality of sensors arranged to measure at least first, second, and third inertial signals in different domains, the plurality of sensors comprising a first Micro-Electro-Mechanical Systems (MEMS) sensor device for measuring the first inertial signal in a first domain, a second MEMS sensor device for measuring the second inertial signal in a second different domain, and a third MEMS sensor device for measuring the third inertial signal in a third different domain; and a processing unit for generating first and second estimated values for the first inertial signal based on, respectively, the second and third inertial signals, and for comparing the first and second estimated values for the first inertial signal to the first inertial signal in order to validate the first inertial signal, where the processing unit generates the first estimated value by computing a first estimated y-axis linear acceleration value from the second inertial signal which comprises a measured roll angular velocity value Ω
X, andwhere the processing unit generates the second estimated value by computing a second estimated y-axis linear acceleration value from the third inertial signal which comprises a measured x-axis linear acceleration value.
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10. A packaged multi-sensor device for measuring and validating one or more inertial signals, comprising:
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a plurality of sensors arranged to measure at least first, second, and third inertial signals in different domains, the plurality of sensors comprising a first Micro-Electro-Mechanical Systems (MEMS) sensor device for measuring the first inertial signal in a first domain, a second MEMS sensor device for measuring the second inertial signal in a second different domain, and a third MEMS sensor device for measuring the third inertial signal in a third different domain; and a processing unit for generating first and second estimated values for the first inertial signal based on, respectively, at least the second and third inertial signals, and for comparing the first and second estimated values for the first inertial signal to the first inertial signal in order to validate the first inertial signal, where the processing unit validates the first inertial signal, which comprises a first measured linear acceleration value in a first direction that is transduced by the first MEMS sensor device, by comparing the first measured linear acceleration value to the first and second estimated values which are derived, respectively, from the second and third MEMS sensor device. - View Dependent Claims (11, 12)
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13. A packaged multi-sensor device for measuring and validating one or more inertial signals, comprising:
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a plurality of sensors arranged to measure at least first, second, and third inertial signals in different domains, the plurality of sensors comprising a first Micro-Electro-Mechanical Systems (MEMS) sensor device for measuring the first inertial signal in a first domain, a second MEMS sensor device for measuring the second inertial signal in a second different domain, and a third MEMS sensor device for measuring the third inertial signal in a third different domain; and a processing unit for generating first and second estimated values for the first inertial signal based on, respectively, the second and third inertial signals, and for comparing the first and second estimated values for the first inertial signal to the first inertial signal in order to validate the first inertial signal, where the processing unit validates the first inertial signal, which comprises a measured roll angular velocity value Ω
X that is transduced by first MEMS sensor device, by comparing the measured roll angular velocity value Ω
X to the first estimated value comprising a first estimated roll angular velocity value Ω
X1 which is derived from the second MEMS sensor device and to the second estimated value comprising a second estimated roll angular velocity value Ω
X2 which is derived from the third MEMS sensor device. - View Dependent Claims (14)
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15. A packaged multi-sensor device for measuring and validating one or more inertial signals, comprising:
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a plurality of sensors arranged to measure at least first, second, and third inertial signals in different domains, the plurality of sensors comprising a first Micro-Electro-Mechanical Systems (MEMS) sensor device for measuring the first inertial signal in a first domain, a second MEMS sensor device for measuring the second inertial signal in a second different domain, and a third MEMS sensor device for measuring the third inertial signal in a third different domain; and a processing unit for generating first and second estimated values for the first inertial signal based on, respectively, at least the second and third inertial signals, and for comparing the first and second estimated values for the first inertial signal to the first inertial signal in order to validate the first inertial signal, where the processing unit generates the first and second estimated values by computing a first estimated roll angular velocity value Ω
X1 from the second inertial signal which comprises a measured x-axis linear acceleration value and computing a second estimated roll angular velocity value Ω
X2 from the third inertial signal which comprises a measured y-axis linear acceleration value. - View Dependent Claims (16)
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Specification