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:
Jan. 23, 2018
Filed:
Apr. 20, 2016
Zoetek Inc., Taipei, TW;
Ren-guey Lee, Taipei, TW;
Ren-Guey Lee, Taipei, TW;
ZOETEK INC., Taipei, TW;
Other;
Abstract
A method and device for detecting a blood flow rate are disclosed. The method comprises steps: providing a detection light source, and projecting a light of the detection light source onto a skin of a living body and reach a blood vessel; using a photo sensor to receive a plurality of polarized light beams which are formed by the light of the detection light source reflected by expanding or contracting the blood vessel, wherein the photo sensor respectively generates a first PPG signal and a second PPG signal in blood vessel expansion and contraction; using a microprocessor to acquire at least one first PPG signal and at least one second PPG signal, calculating an offset of received light beams and a time derivative thereof according to a sequence of the first PPG signal and the second PPG signal, and converting the offset and time derivative into a blood flow rate.