Sport ball athletic activity monitoring methods and systems
First Claim
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1. A method for determining trajectory of an object used for an athletic activity, the method comprising:
- sensing first magnetic field data and first acceleration data at a first time, using a sensor module coupled to the object;
determining an orientation of the object at the first time, based on the first magnetic field data and first acceleration data;
sensing second magnetic field data and second acceleration data at a second time, using the sensor module;
determining an orientation and an acceleration direction of the object at the second time, based on the second magnetic field data and second acceleration data; and
determining a trajectory of the object at the second time, based on the orientation of the object at the first time, and the orientation and the acceleration direction of the object at the second time.
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Abstract
A method for monitoring a ball used for an athletic activity includes detecting movement of the ball at a first time, using a sensor module coupled to the ball, determining that the movement of the ball corresponds to a predetermined activation movement, entering an active state of the sensor module in response to the determination that the movement of the ball corresponds to the predetermined activation movement, and detecting movement of the ball at a second time, using the sensor module in the active state.
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Citations
55 Claims
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1. A method for determining trajectory of an object used for an athletic activity, the method comprising:
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sensing first magnetic field data and first acceleration data at a first time, using a sensor module coupled to the object; determining an orientation of the object at the first time, based on the first magnetic field data and first acceleration data; sensing second magnetic field data and second acceleration data at a second time, using the sensor module; determining an orientation and an acceleration direction of the object at the second time, based on the second magnetic field data and second acceleration data; and determining a trajectory of the object at the second time, based on the orientation of the object at the first time, and the orientation and the acceleration direction of the object at the second time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for determining trajectory of a ball used for an athletic activity, the method comprising:
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sensing first magnetic field data and first acceleration data at a first time, using a sensor module coupled to the ball; determining an orientation of the ball at the first time, based on the first magnetic field data and first acceleration data; sensing second magnetic field data and second acceleration data at a second time, using the sensor module; determining an orientation and an acceleration direction of the ball at the second time, based on the second magnetic field data and second acceleration data; and determining a trajectory of the ball at the second time, based on the orientation of the ball at the first time, and the orientation and the acceleration direction of the ball at the second time. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method for determining trajectory of an object used for an athletic activity, the method comprising:
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determining a gravity direction with respect to a magnetic field, based on first magnetic field data and first acceleration data sensed by a sensor module coupled to the object, at a first time; determining a relative acceleration direction at a second time, based on second acceleration data sensed by the sensor module at the second time; determining an acceleration direction with respect to the gravity direction at the second time, based on the determination of the gravity direction with respect to the magnetic field and the determination of the acceleration direction with respect to the sensor module at the second time; and determining a trajectory at the second time based on the determination of the acceleration direction with respect to the gravity direction at the second time. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55)
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Specification