RESPIRATION RATE DETERMINING APPARATUS, RESPIRATION RATE DETERMINING METHOD, AND PROGRAM RECORDING MEDIUM
First Claim
1. A respiration rate determining apparatus, comprising:
- an obtaining unit which obtains accelerations in directions that are mutually different, the accelerations being obtained by an acceleration sensor measuring a body movement by respiration of a user;
a transform unit which transforms the accelerations in the directions obtained by the obtaining unit, into spectrum information items in a frequency domain;
a phase removing unit which transforms the spectrum information items into amplitude spectra by removing phase information from the spectrum information items;
a peak detector which adds up the amplitude spectra and detects a peak frequency based on an amplitude spectrum resulting from the adding up, the peak frequency indicating a respiratory component; and
a respiration rate calculator which calculates a respiration rate using the peak frequency.
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Abstract
A respiration rate determining apparatus includes: an obtaining unit which obtains accelerations in directions that are mutually different, the accelerations being obtained by an acceleration sensor measuring a body movement by respiration of a user; a transform unit which transforms the accelerations in the directions obtained by the obtaining unit, into spectrum information items in a frequency domain; a phase removing unit which transforms the spectrum information items into amplitude spectra by removing phase information from the spectrum information items; a peak detector which adds up the amplitude spectra and detects a peak frequency based on an amplitude spectrum resulting from the adding up, the peak frequency indicating a respiratory component; and a respiration rate calculator which calculates a respiration rate using the peak frequency.
8 Citations
8 Claims
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1. A respiration rate determining apparatus, comprising:
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an obtaining unit which obtains accelerations in directions that are mutually different, the accelerations being obtained by an acceleration sensor measuring a body movement by respiration of a user; a transform unit which transforms the accelerations in the directions obtained by the obtaining unit, into spectrum information items in a frequency domain; a phase removing unit which transforms the spectrum information items into amplitude spectra by removing phase information from the spectrum information items; a peak detector which adds up the amplitude spectra and detects a peak frequency based on an amplitude spectrum resulting from the adding up, the peak frequency indicating a respiratory component; and a respiration rate calculator which calculates a respiration rate using the peak frequency. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A respiration rate determining method, comprising:
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obtaining accelerations in directions that are mutually different, the accelerations being obtained by an acceleration sensor measuring a body movement by respiration of a user; transforming the accelerations in the directions that are obtained, into spectrum information items in a frequency domain; transforming the spectrum information items into amplitude spectra by removing phase information from the spectrum information items; adding up the amplitude spectra and detecting a peak frequency based on an amplitude spectrum resulting from the adding up, the peak frequency indicating a respiratory component; and calculating a respiration rate using the peak frequency.
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8. A non-transitory computer-readable recording medium for use in a computer, the recording medium having a computer program recorded thereon for causing the computer to execute:
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obtaining accelerations in directions that are mutually different, the accelerations being obtained by an acceleration sensor measuring a body movement by respiration of a user; transforming the accelerations in the directions that are obtained, into spectrum information items in a frequency domain; transforming the spectrum information items into amplitude spectra by removing phase information from the spectrum information items; adding up the amplitude spectra and detecting a peak frequency based on an amplitude spectrum resulting from the adding up, the peak frequency indicating a respiratory component; and calculating a respiration rate using the peak frequency.
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Specification