The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 28, 2017
Filed:
May. 26, 2015
Verily Life Sciences Llc, Mountain View, CA (US);
Christopher Towles Lengerich, Palo Alto, CA (US);
Verily Life Sciences LLC, Mountain View, CA (US);
Abstract
Systems and methods are provided for determining a pulse rate based on a photoplethysmographic measurement of blood in a portion of subsurface vasculature. A plurality of samples of the photoplethysmographic signal are obtained and a plurality of digital phase-locked loops are operated to generate respective oscillating signals based on the plurality of samples. Respective correlations between the plurality of samples and each of the generated oscillating signals are determined and used to select a subset of the plurality of phase-locked loops. The frequencies of the selected oscillating signals generated by the selected phase-locked loops are determined and used to determine a cardiovascular pulse rate. This method can be performed a plurality of times for a respective plurality of overlapping sets of the obtained plurality of samples to determine pulse rates over time.