Overall motion determination
First Claim
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1. An apparatus comprising:
- an accelerometer configured to measure instantaneous acceleration values representing lower limb motion of a user, a processor configured to process said instantaneous acceleration values, wherein the instantaneous acceleration values comprise at least two orthogonal acceleration vector components, the processor being configured to form a scalar representation of the at least two orthogonal acceleration vector components and to form an effective acceleration value using only the scalar representation over a plurality of steps of the user without using direction information associated with the orthogonal acceleration vector components, the processor being further configured to determine a motion parameter representing overall motion of the user by using the effective acceleration value, thereby reducing sensitivity to orientation of the apparatus and reducing a need for calibration of the apparatus.
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Abstract
An apparatus, a method, and a computer program are disclosed. The apparatus comprises a processor. The processor is configured to obtain instantaneous acceleration values representing lower limb motion of a user, to form an effective acceleration value from the instantaneous acceleration values over a plurality of steps of the user, and to determine a motion parameter representing overall motion of the user by means of the effective acceleration value.
12 Citations
17 Claims
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1. An apparatus comprising:
an accelerometer configured to measure instantaneous acceleration values representing lower limb motion of a user, a processor configured to process said instantaneous acceleration values, wherein the instantaneous acceleration values comprise at least two orthogonal acceleration vector components, the processor being configured to form a scalar representation of the at least two orthogonal acceleration vector components and to form an effective acceleration value using only the scalar representation over a plurality of steps of the user without using direction information associated with the orthogonal acceleration vector components, the processor being further configured to determine a motion parameter representing overall motion of the user by using the effective acceleration value, thereby reducing sensitivity to orientation of the apparatus and reducing a need for calibration of the apparatus. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method to determine overall motion of a user, the method comprising:
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measuring with an accelerometer instantaneous acceleration values representing lower limb motion of a user, wherein the instantaneous acceleration values comprise at least two orthogonal acceleration vector components; forming using a processing device a scalar representation of the at least two orthogonal acceleration vector components; forming using said processing device an effective acceleration value using only the scalar representation over a plurality of steps of the user without using direction information associated with the orthogonal acceleration vector components; and
determining a motion parameter representing overall motion of the user by using the effective acceleration value, thereby reducing sensitivity to orientation of the apparatus and reducing a need for calibration of the apparatus. - View Dependent Claims (8, 9, 10, 11)
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12. An apparatus to determine overall motion of a user, the apparatus comprising:
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an accelerometer to measure instantaneous acceleration values representing lower limb motion of a user, wherein the instantaneous acceleration values comprise at least two orthogonal acceleration vector components; a processing device that performs operations comprising; forming a scalar representation of the at least two orthogonal acceleration vector components; forming an effective acceleration value using only the scalar representation over a plurality of steps of the user without using direction information associated with the orthogonal acceleration vector components; and determining a motion parameter representing overall motion of the user by using the effective acceleration value, thereby reducing sensitivity to orientation of the apparatus and reducing a need for calibration of the apparatus.
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13. A non-transitory computer-readable medium, comprising instructions which, when executed by a mobile apparatus, cause the mobile apparatus to:
- measure instantaneous acceleration values representing lower limb motion of a user using an accelerometer, wherein the instantaneous acceleration values comprise at least two orthogonal acceleration vector components;
form a scalar representation of the at least two orthogonal acceleration vector components using a processing device; form an effective acceleration value from using only the scalar representation over a plurality of steps of the user without using direction information associated with the orthogonal acceleration vector components using said processing device; and
determine using said processing device a motion parameter representing overall motion of the user by using the effective acceleration value, thereby reducing sensitivity to orientation of the apparatus and reducing a need for calibration of the apparatus. - View Dependent Claims (14, 15, 16, 17)
- measure instantaneous acceleration values representing lower limb motion of a user using an accelerometer, wherein the instantaneous acceleration values comprise at least two orthogonal acceleration vector components;
Specification