Apparatus and method for classification of physical orientation
First Claim
1. A method comprising:
- training a classifier device using learning obtained from a plurality of training algorithms each adapted to differentiate between states of physical orientation of an object in response to input data from a tri-axial accelerometer;
wherein at least two of the training algorithms are trained using data from the tri-axial accelerometer when the tri-axial accelerometer is mounted on the object at non-ideal mount angles relative to an ideal mount angle having one axis of the tri-axial accelerometer aligned with a gravitational vector; and
wherein the classifier device is trained to distinguish between the states of the object to which the tri-axial accelerometer device is mounted based on data collected from the tri-axial accelerometer device mounted at one or more of a plurality of respective angles with respect to the ideal mount angle on the object, wherein the plurality of respective angles are in the range of −
180 degrees to +180 degrees.
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Abstract
A state classifier uses learning obtained from a plurality of training algorithms each adapted to differentiate between states of physical orientation of an object in response to input data from an tri-axial accelerometer. At least two of the training algorithms are trained using data from an accelerometer mounted at a non-ideal angle. The classifier is trained to distinguish between the desired states from data collected from an tri-axial accelerometer device mounted at a plurality of respective angles with respect to a optimal axis on the object, wherein the angles are in the range of −180 degrees to +180 degrees. The classifier may include a plurality of classifiers and a decision fusion module used to combine the decisions from the respective classifiers to ascertain a state.
70 Citations
20 Claims
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1. A method comprising:
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training a classifier device using learning obtained from a plurality of training algorithms each adapted to differentiate between states of physical orientation of an object in response to input data from a tri-axial accelerometer; wherein at least two of the training algorithms are trained using data from the tri-axial accelerometer when the tri-axial accelerometer is mounted on the object at non-ideal mount angles relative to an ideal mount angle having one axis of the tri-axial accelerometer aligned with a gravitational vector; and wherein the classifier device is trained to distinguish between the states of the object to which the tri-axial accelerometer device is mounted based on data collected from the tri-axial accelerometer device mounted at one or more of a plurality of respective angles with respect to the ideal mount angle on the object, wherein the plurality of respective angles are in the range of −
180 degrees to +180 degrees. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus comprising:
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a plurality of classifiers to distinguish between desired states of physical orientation of an object using data collected from an tri-axial accelerometer device mounted on the object, wherein each of the classifiers is configured receive data collected from the tri-axial accelerometer device when mounted on the object, wherein at least one classifier of the plurality of classifiers is trained using first training data and one or more second classifiers are trained using different training data, wherein the different training data correlates to one or more sets of data collected from the tri-axial accelerometer in one or more respective non-ideal mount angles on the object that differ from an ideal mount angle on the object having one axis of the tri-axial accelerometer aligned with a gravitational vector; and a decision fusion module to identify one of the desired states from classification information received each of the classifiers based on state data collected from the tri-state accelerometer device; wherein and the ideal mount angle and the at least one non-ideal mount are independent from the desired states of physical orientation of the object. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method of determining a state of physical orientation of an object, the method comprising:
training a classifier to differentiate between a plurality of possible states of physical orientation of an object based on data collected from a tri-axial accelerometer when mounted on the object at different mount angles, wherein training the classifier comprises; collecting first data from the tri-axial accelerometer mounted to the object at a first mount angle such that one axis of the tri-axial accelerometer is aligned to a gravitational vector; collecting one or more second data from the tri-axial accelerometer mounted to the object at one or more second mount angles that differ from the first mount angle; providing the first data to at least one training algorithm of a plurality of training algorithms to differentiate between possible states of physical orientation of the object; providing the one or more second data to at least two training algorithms of the plurality of training algorithms to differentiate between the possible states; generating an output from each of the plurality of training algorithms; and providing each of the outputs to the classifier to train the classifier to differentiate between the plurality of possible states of the object; wherein the first mount angle and the one or more second mount angles are independent from the plurality of possible states of physical orientation of the object. - View Dependent Claims (18, 19, 20)
Specification