Opposing accelerometers for a heart rate monitor
First Claim
1. A method for a pulse detection of a person by a heart rate monitor including a plurality of multi-axis accelerometers adjoined to a platform at different angular orientations with respect to each other, each multi-axis accelerometer having acceleration sensing axes including a vertical axis and at least one of a lateral axis and a longitudinal axis, the method comprising:
- spatially mounting, via the platform, the multi-axis accelerometers at the different angular orientations of the multi-axis accelerometers with respect to each other on respective opposing body surfaces of the person, wherein the relative angular orientation of the accelerometers is rigidly maintained by the body surfaces;
generating, via the multi-axis accelerometers as mounted on the person, differential mode signals indicative of a sensing by the multi-axis accelerometers of a physiological motion of the person relative to the vertical axes of the multi-axis accelerometers normal to a body surface of the person;
generating, via the multi-axis accelerometers as mounted on the person, common mode signals indicative of a sensing by the multi-axis accelerometers of an extraneous motion by the person relative to the at least one of the lateral axes and the longitudinal axes of the multi-axis accelerometers parallel to the body surface of the person;
aligning, via the heart rate monitor, the vertical axes of the multi-axis accelerometers relative to an additional baseline axis to combine the differential mode signals and cancel the common mode signals; and
generating, via the heart rate monitor, a pulse signal from the combining of the differential mode signals and the cancelling of the common mode signals as a function of the alignment of the vertical axes of the multi-axis accelerometers.
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Accused Products
Abstract
A heart rate monitor (40) for detecting a pulse of a person (10) employs a platform (43), a plurality of multi-axis accelerometers (41R, 41L) and a pulse detector (44). The multi-axis accelerometers (41R, 41L) are adjoined to the platform (43) to generate differential mode signals (AZR, AZL) indicative of a sensing by the accelerometers (41) of physiological motion (12) of the person (10) relative to acceleration sensing axes (42R, 42L) and to generate common mode signals (AXR, AXL, AYR, AYL) indicative of a sensing by the accelerometers (41R, 41L) of extraneous motion by the person (10) relative to the acceleration sensing axes (42R, 42L). The pulse detector (44) is operably connected to the multi-axis accelerometers (41R, 41L) to generate a pulse signal (PS)as a function of a vertical alignment of the acceleration sensing axes (42R, 42L) combining the differential mode signals (AZR, AZL) and cancelling the common mode signals (AXR, AXL, AYR, AYL).
17 Citations
13 Claims
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1. A method for a pulse detection of a person by a heart rate monitor including a plurality of multi-axis accelerometers adjoined to a platform at different angular orientations with respect to each other, each multi-axis accelerometer having acceleration sensing axes including a vertical axis and at least one of a lateral axis and a longitudinal axis, the method comprising:
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spatially mounting, via the platform, the multi-axis accelerometers at the different angular orientations of the multi-axis accelerometers with respect to each other on respective opposing body surfaces of the person, wherein the relative angular orientation of the accelerometers is rigidly maintained by the body surfaces; generating, via the multi-axis accelerometers as mounted on the person, differential mode signals indicative of a sensing by the multi-axis accelerometers of a physiological motion of the person relative to the vertical axes of the multi-axis accelerometers normal to a body surface of the person; generating, via the multi-axis accelerometers as mounted on the person, common mode signals indicative of a sensing by the multi-axis accelerometers of an extraneous motion by the person relative to the at least one of the lateral axes and the longitudinal axes of the multi-axis accelerometers parallel to the body surface of the person; aligning, via the heart rate monitor, the vertical axes of the multi-axis accelerometers relative to an additional baseline axis to combine the differential mode signals and cancel the common mode signals; and generating, via the heart rate monitor, a pulse signal from the combining of the differential mode signals and the cancelling of the common mode signals as a function of the alignment of the vertical axes of the multi-axis accelerometers. - View Dependent Claims (2, 3, 4)
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5. A heart rate monitor for detecting a pulse of a person, the heart rate monitor comprising:
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a platform; a plurality of multi-axis accelerometers adjoined to the platform and having different angular orientations at opposing body surfaces, each of the multi-axis accelerometers having a vertical axis to generate a respective differential mode signal indicative of a sensing by the multi-axis accelerometers of a physiological motion normal to a body surface of the person and a longitudinal axis and a lateral axis parallel to the body surface to generate common mode signals indicative of a sensing by the multi-axis accelerometers of an extraneous motion by the person relative to the at least one of the lateral axes and the longitudinal axes of the multi-axis accelerometers, wherein, in use, the relative angular orientation of the multi-axis accelerometers is rigidly maintained by the body surfaces; and a pulse detector operably connected to the multi-axis accelerometers to generate a pulse signal as a function of an alignment of the vertical acceleration sensing axes combining the differential mode signals and cancelling the common mode signals. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
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Specification