Method for calibrating an accelerometer of an electronic device, an accelerometer, and an electronic device having an accelerometer with improved calibration features
First Claim
1. A method of calibrating an accelerometer of an electronic device, the accelerometer comprising a sensing element, wherein the sensing element includes a primary sensing component and a secondary sensing component which each measure acceleration along a first sensing axis, wherein the primary sensing component has a positive heading which measures positive acceleration in a first direction relative to the first sensing axis and the secondary sensing component has a positive heading which measures positive acceleration in a second direction oriented 180°
- relative to the first direction of the primary sensing component, the method comprising;
measuring first acceleration using the primary sensing component to obtain first calibration data;
measuring second acceleration using the secondary sensing component to obtain second acceleration calibration data;
determining calibration parameters in accordance with the first acceleration calibration data and the second acceleration calibration data, the calibration parameters representing values for adjusting an acceleration measured using the accelerometer; and
storing the calibration parameters in a memory of the electronic device.
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Abstract
An accelerometer with improved calibration features, an electronic device having an accelerometer with improved calibration features, and a method of calibrating an accelerometer of an electronic device are provided. In accordance with one embodiment, there is method of calibrating an accelerometer of an electronic device, the accelerometer having at least a primary sensing axis and a secondary sensing axis, the second sensing axis being oriented parallel to the primary sensing axis and in the opposite direction of the primary sensing axis, the method comprising: measuring acceleration calibration data using the primary sensing axis and the secondary sensing axis of the accelerometer; determining calibration parameters in accordance with measured calibration data from the accelerometer; and storing the calibration parameters in a memory of the electronic device.
56 Citations
20 Claims
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1. A method of calibrating an accelerometer of an electronic device, the accelerometer comprising a sensing element, wherein the sensing element includes a primary sensing component and a secondary sensing component which each measure acceleration along a first sensing axis, wherein the primary sensing component has a positive heading which measures positive acceleration in a first direction relative to the first sensing axis and the secondary sensing component has a positive heading which measures positive acceleration in a second direction oriented 180°
- relative to the first direction of the primary sensing component, the method comprising;
measuring first acceleration using the primary sensing component to obtain first calibration data; measuring second acceleration using the secondary sensing component to obtain second acceleration calibration data; determining calibration parameters in accordance with the first acceleration calibration data and the second acceleration calibration data, the calibration parameters representing values for adjusting an acceleration measured using the accelerometer; and storing the calibration parameters in a memory of the electronic device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- relative to the first direction of the primary sensing component, the method comprising;
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11. An accelerometer, comprising a sensing element, wherein the sensing element includes a primary sensing component and a secondary sensing component which each measure acceleration along a first sensing axis, wherein the primary sensing component has a positive heading which measures positive acceleration in a first direction relative to the first sensing axis and the secondary sensing component has a positive heading which measures positive acceleration in a second direction oriented 180°
- relative to the first direction of the primary sensing component.
- View Dependent Claims (12, 13)
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14. An electronic device, comprising:
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an accelerometer comprising a sensing element, wherein the sensing element includes a primary sensing component and a secondary sensing component which each measure acceleration along a first sensing axis, wherein the primary sensing component has a positive heading which measures positive acceleration in a first direction relative to the first sensing axis and the secondary sensing component has a positive heading which measures positive acceleration in a second direction oriented 180°
relative to the first direction of the primary sensing component;a controller connected to the accelerometer; a memory connected to the controller for storing calibration data for the accelerometer; the controller, in a calibration mode, being configured to determine calibration parameters in accordance with acceleration calibration data from the accelerometer and store the calibration parameters in the memory; the controller, in a measuring mode, being configured to measure acceleration using the accelerometer and to adjust the measured acceleration in accordance with the calibration parameters stored in the memory. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification