Methods and Apparatus for Detecting Motion Noise and for Removing Motion Noise from Physiological Signals
First Claim
1. A method of at least partially removing motion artifacts from physiological signals produced by a physiological sensor of a wearable device, wherein the physiological sensor includes at least one optical emitter and at least one optical detector, the method comprising:
- detecting light emitted by the at least one optical emitter that is scattered by a body of a subject wearing the device and producing a physiological information signal therefrom via the at least one optical detector;
detecting light emitted by the at least one optical emitter that is scattered by a light regulating region of the wearable device and producing a motion noise information signal via the at least one optical detector; and
processing the physiological information signal and the motion noise information signal via at least one processor associated with the wearable device to at least partially remove unwanted motion artifacts from the physiological information signal.
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Accused Products
Abstract
Methods and apparatus are presented for removing motion artifacts from physiological signals produced by a physiological sensor of a wearable device, wherein the physiological sensor includes at least one optical emitter and at least one optical detector. Light emitted by the at least one optical emitter that is scattered by a body of a subject wearing the device is detected, and a physiological information signal therefrom is produced via the at least one optical detector. Light emitted by the at least one optical emitter that is scattered by a light regulating region of the wearable device is detected, and a motion noise information signal is produced via the at least one optical detector. The physiological information signal and the motion noise information signal are processed via at least one processor associated with the wearable device to at least partially remove unwanted motion artifacts from the physiological information signal.
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Citations
28 Claims
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1. A method of at least partially removing motion artifacts from physiological signals produced by a physiological sensor of a wearable device, wherein the physiological sensor includes at least one optical emitter and at least one optical detector, the method comprising:
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detecting light emitted by the at least one optical emitter that is scattered by a body of a subject wearing the device and producing a physiological information signal therefrom via the at least one optical detector; detecting light emitted by the at least one optical emitter that is scattered by a light regulating region of the wearable device and producing a motion noise information signal via the at least one optical detector; and processing the physiological information signal and the motion noise information signal via at least one processor associated with the wearable device to at least partially remove unwanted motion artifacts from the physiological information signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A motion noise sensor configured to be attached to a body of a subject, the motion noise sensor comprising:
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at least one optical emitter; at least one optical detector; and a light regulating region configured to at least partially block light from the at least one optical emitter from reaching the body of the subject, wherein the light guiding region is configured to move in response to subject motion. - View Dependent Claims (14, 15, 16, 17)
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18. A wearable apparatus, comprising:
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a physiological sensor comprising at least one optical emitter and at least one optical detector; and a light regulating region, wherein the at least one optical detector is configured to detect light from the at least one optical emitter that is scattered by a body of a subject wearing the apparatus and to produce a physiological information signal therefrom, and wherein the at least one optical detector is configured to detect light from the at least one optical emitter that is scattered by the light regulating region and to produce a motion noise information signal therefrom. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification