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:
Jul. 30, 2013
Filed:
Sep. 03, 2010
Alain Jornod, Neuchâtel, CH;
Alain Jornod, Neuchâtel, CH;
The Swatch Group Research and Development Ltd, Marin, CH;
Abstract
System and method to determine the heartbeat of a person by a pulse measuring device. Light waves are generated in the direction of the skin by two light sources with a first wavelength (λ) which is sensitive to the pulse beat and movement of the person, and with a different second wavelength (λ) which is sensitive to movement, wherein a photodetector detects the reflected light waves. A pulse is determined based on calculation made of at least one non-coherent power spectrum on the basis of a spectral coherence function γ which takes into account the dependence between the measurement signals relating to the first wavelength and to the second wavelength by the formula S=(1−γ)*S, where Sis the average Fourier power spectrum of the signals relating to the first wavelength, and where γis between 0 and 1.