Linear acceleration sensor and operating method for the same
AssigneeHoneywld Technology Corp.
InventorJEN-CHIEN HSU
Life of this patent
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Abstract
A linear acceleration sensor and an operating method for the same are provided. The sensor elements installed in the linear acceleration sensor include an accelerometer and a gyroscope. The accelerometer is used to measure acceleration values along axes of the linear acceleration sensor over a period of time. The gyroscope is used to measure angular velocities of the sensor over the period of time. In the operating method, the measurement data from the accelerometer and the gyroscope are transformed to a reference frame through a mapping process. A filtering process is performed on the mapped data in order to separate a gravity value from the data. Therefore, the motion signals with respect to the linear acceleration sensor can be obtained.
Claims16
A linear acceleration sensor, comprising:
- a micro-controller, used to process signals generated by electronic components of the linear acceleration sensor;
- an accelerometer, electrically connected with the micro-controller, used to measure multiple acceleration values rendered by the linear acceleration sensor along axes for a continuous period of time, and store the acceleration values into a first buffer;
- a gyroscope, electrically connected with the micro-controller, used to measure multiple angular velocities rendered by the linear acceleration sensor for the continuous period of time, and store the angular velocities into a second buffer;
- wherein the micro-controller performs an operating method including:
- retrieving the acceleration values from the accelerometer;
- retrieving angular velocities from the gyroscope;
- transforming the acceleration values and the angular velocities to a reference frame through a mapping process;
- filtering out a gravity value from the mapped acceleration values and the angular velocities;
- and
- obtaining motion signals from the acceleration values and the angular velocities.
An operating method performed in a linear acceleration sensor comprising:
- continuously measuring a plurality of measurement values responsive to statuses of the linear acceleration sensor, and storing the measurement value to a memory;
- retrieving the measurement values from the memory, and transforming the measurement values to a reference frame through a mapping process;
- filtering out a gravity value from the mapped measurement values;
- and
- obtaining motions signals of the linear acceleration sensor from the measurement values.
Dependencies are inferred from the claim text.