Rotational sensor system
First Claim
1. A system for measuring movement characteristics of a moving object over a plurality of measurement cycles, said system comprising:
- an accelerometer unit attached to said object, said accelerometer unit configured so as to provide acceleration signals corresponding to accelerations associated with a movement of said object during said plurality of measurement cycles;
a magnetometer unit attached to said object and configured so as to provide signals corresponding to magnetic field values within which said moving object is located;
a processing system coupled to process sets of signals provided by said magnetometer unit and sets of signals corresponding to gravity field values within which said moving object is located based on signals provided by said accelerometer unit each said set of said magnetic field value and said gravity field value signals provided before and after an incremental change in rotation of said moving object within each one of said measurement cycles, said processing system being configured to calculate based on said gravity and magnetic field values, incremental rotation angles dθ
about an axis of a three dimensional coordinate system associated with said incremental change in rotation.
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Accused Products
Abstract
A device that measures the distance traveled, speed, and height jumped of a person while running or walking. Accelerometers and rotational sensors are placed in the sole of one shoe along with an electronic circuit that performs mathematical calculations to determine the distance and height of each step. A radio frequency transmitter sends the distance and height information to a wristwatch or other central receiving unit. A radio frequency receiver in the wristwatch or other unit is coupled to a microprocessor that calculates an output speed based upon step-distance and elapsed time, and the distance traveled of the runner from the sum of all previous step distances. The output of the microprocessor is coupled to a display that shows the distance traveled, speed, or height jumped of the runner or walker.
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Citations
23 Claims
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1. A system for measuring movement characteristics of a moving object over a plurality of measurement cycles, said system comprising:
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an accelerometer unit attached to said object, said accelerometer unit configured so as to provide acceleration signals corresponding to accelerations associated with a movement of said object during said plurality of measurement cycles;
a magnetometer unit attached to said object and configured so as to provide signals corresponding to magnetic field values within which said moving object is located;
a processing system coupled to process sets of signals provided by said magnetometer unit and sets of signals corresponding to gravity field values within which said moving object is located based on signals provided by said accelerometer unit each said set of said magnetic field value and said gravity field value signals provided before and after an incremental change in rotation of said moving object within each one of said measurement cycles, said processing system being configured to calculate based on said gravity and magnetic field values, incremental rotation angles dθ
about an axis of a three dimensional coordinate system associated with said incremental change in rotation.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for measuring motion characteristics of a moving object over a plurality of measurement cycles comprising the steps of:
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measuring magnetic field values associated with movement of said object;
measuring gravity field values within which said moving object is located;
processing sets of signals corresponding to said gravity field values and said magnetic field values, wherein said sets of signals are provided before and after an incremental change in rotation of said moving object within each of said measurement cycles, so as to calculate incremental rotation angles dθ
about an axis of a three dimensional translational coordinate system associated with said incremental changes in rotation.- View Dependent Claims (20, 21, 22, 23)
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Specification