US 11,890,084 B2
Apparatus and method for estimating bio-information
Chang Soon Park, Chungju-si (KR); Ui Kun Kwon, Hwaseong-si (KR); Seung Keun Yoon, Seoul (KR); and Dae Geun Jang, Yongin-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Sep. 30, 2020, as Appl. No. 17/038,692.
Claims priority of application No. 10-2020-0009152 (KR), filed on Jan. 23, 2020.
Prior Publication US 2021/0228100 A1, Jul. 29, 2021
Int. Cl. A61B 5/024 (2006.01); A61B 5/00 (2006.01); A61B 5/021 (2006.01)
CPC A61B 5/02416 (2013.01) [A61B 5/02116 (2013.01); A61B 5/7239 (2013.01); A61B 5/7278 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus for estimating bio-information, the apparatus comprising:
a sensor configured to obtain a bio-signal from an object;
a processor; and
an output interface;
wherein the processor is configured to:
obtain a second-order differential signal of the bio-signal;
determine whether a first local minimum point of the second-order differential is stable or unstable;
based on determining that the first local minimum point of the second-order differential signal is stable, extract a progressive wave component from the bio-signal using the first local minimum point of the second-order differential signal,
based on determining that the first local minimum point of the second-order differential signal is unstable, extract the progressive wave component from the bio-signal using a maximum amplitude point in a systolic portion of the bio-signal;
determine the estimated bio-information based on the extracted progressive wave component, the estimated bio-information representing an actual health condition of a user having the object; and
direct the output interface to provide the estimated bio-information to the user so as to monitor the actual health condition.