Device and method for estimating the heart rate during motion
First Claim
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1. A portable device for determining a heart rate of a person, said portable device comprising:
- a heart rate sensor for measuring the heart rate of the person over time to generate a heart rate signal;
an inertial sensor for measuring the motion of a body part of the person over time to generate a motion signal; and
a processing unit which is adapted to;
measure via signal analysis of the heart rate signal a signal quality of the heart rate signal;
calculate the heart rate based on the heart rate signal if said measured signal quality is above a predefined threshold; and
estimate the heart rate based on the motion signal if said measured signal quality is below said threshold by estimating a heart rate constant (HRconstant) and defining an exponential development of the heart rate over time, wherein the exponential development includes an exponential curve indicating the heart rate over time, wherein the exponential curve is based on the person'"'"'s fitness.
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Abstract
The present invention relates to a portable device for determining a heart rate of a person, said portable device comprising:
- a heart rate measurement unit for measuring the heart rate of the person over time to generate a heart rate signal,
- a motion measurement unit for measuring the motion of a body part of the person over time to generate a motion signal, and
- a processing unit which is adapted to measure a signal quality of the heart rate signal, to calculate the heart rate based on the heart rate signal if said signal quality is above a predefined threshold, and to estimate the heart rate based on the motion signal if said signal quality is below said threshold.
23 Citations
14 Claims
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1. A portable device for determining a heart rate of a person, said portable device comprising:
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a heart rate sensor for measuring the heart rate of the person over time to generate a heart rate signal; an inertial sensor for measuring the motion of a body part of the person over time to generate a motion signal; and a processing unit which is adapted to; measure via signal analysis of the heart rate signal a signal quality of the heart rate signal; calculate the heart rate based on the heart rate signal if said measured signal quality is above a predefined threshold; and estimate the heart rate based on the motion signal if said measured signal quality is below said threshold by estimating a heart rate constant (HRconstant) and defining an exponential development of the heart rate over time, wherein the exponential development includes an exponential curve indicating the heart rate over time, wherein the exponential curve is based on the person'"'"'s fitness. - View Dependent Claims (2)
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3. A portable device for determining a heart rate of a person, said portable device comprising:
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a heart rate sensor for measuring the heart rate of the person over time to generate a heart rate signal; an inertial sensor for measuring the motion of a body part of the person over time to generate a motion signal; and a processing unit which is adapted to; measure via signal analysis of the heart rate signal a measured signal quality of the heart rate signal; calculate the heart rate based on the heart rate signal if said measured signal quality is above a predefined threshold; and estimate the heart rate based on the motion signal if said measured signal quality is below said threshold, wherein the processing unit is adapted to estimate the heart rate by estimating a heart rate constant (HRconstant) and defining an exponential development of the heart rate over time, wherein the exponential development includes an exponential curve indicating the heart rate over time and wherein the exponential curve is based on the person'"'"'s fitness. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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11. A method for determining a heart rate of a person, the method comprising:
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measuring the heart rate of the person over time to generate a heart rate signal; measuring the motion of a body part of the person over time to generate a motion signal; measuring via signal analysis of the heart rate signal a signal quality of the heart rate signal; calculating the heart rate based on the heart rate signal if said measured signal quality is above a predefined threshold; and estimating the heart rate based on the motion signal if said measured signal quality is below said threshold, wherein the estimating includes estimating a heart rate constant (HRconstant) and defining an exponential development of the heart rate over time, wherein the exponential development includes an exponential curve indicating the heart rate over time, wherein the exponential curve is based on the person'"'"'s fitness. - View Dependent Claims (12)
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13. A non-transitory, computer readable medium comprising program code that, when executed by a processing device, causes the processing device to:
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receive a heart rate signal; receive a motion signal; measure via signal analysis of the heart rate signal a signal quality of the heart rate signal; calculate a heart rate based on the heart rate signal if said measured signal quality is above a predefined threshold; and estimate the heart rate based on the motion signal if said measured signal quality is below said threshold by estimating a heart rate constant (HRconstant) and defining an exponential development of the heart rate over time, wherein the exponential development includes an exponential curve indicating the heart rate over time, wherein the exponential curve has a time constant a, a being a constant related to the person'"'"'s fitness which decreases with increasing fitness. - View Dependent Claims (14)
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Specification