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US 11,633,152 B2Granted
Method of monitoring respiratory rate in a health monitoring device
AssigneePurdue Research Foundation
InventorsJacqueline C Linnes, Benjamin David Walters, Orlando S Hoilett
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Abstract
This invention generally relates to methods useful for measuring heart rate, respiration conditions, and oxygen saturation and a wearable device that incorporate those methods with a computerized system supporting data collection, analysis, readout and sharing. Particularly this present invention relates to a wearable device, such as a wristwatch or ring, for real time measuring heart rate, respiration conditions, and oxygen saturation.
Claims10
A method for measuring and monitoring respiration rate of a subject, comprising the step of
- a) placing a wearable device on a subject for measuring one or more biological parameters of the subject, the wearable device including a biometric sensor board having a photosensor adapted to generate a time-varying signal corresponding to reflectance of red and infrared lights off skin tissue, a locomotion sensor package, comprising a gyroscope and an accelerometer each generating a time-varying motion signal associated with motion with respect to three axes;
- (b) sampling the time-varying photosensor signal and the time-varying motion signals to thereby generate a digitized time-varying photosensor signal and digitized time-varying motion sensor signals;
- (c) applying a Fourier transform to the digitized time-varying photosensor signal and the digitized time-varying motion signals to thereby generate frequency domain spectra associated with magnitudes of the digitized time-varying photosensor signal and the digitized time-varying motion signals;
- (d) detecting peaks of the magnitudes of the spectra of the digitized time-varying photosensor signal and the digitized time-varying motion signals;
- (e) comparing the peaks of magnitudes of the frequency domain spectrum associated with the digitized time-varying photosensor signal with the peaks of magnitudes of the frequency domain spectrum associated with the digitized time-varying motion signals;
- (f) identifying a peak present in the frequency domain spectrum associated with the digitized time-varying photosensor signal which is not present in the peaks of magnitudes of the frequency domain spectrum associated with the digitized time-varying motion signals;
- (g) multiplying the frequency associated with the identified peak by 60 to thereby generate activity per minute to thereby process respiration rate data;
- and
- communicating the processed respiration rate data by displaying said processed respiration rate on the wearable device.
6 more elements
Dependencies are inferred from the claim text.