公开(公告)号：US11701011B2

公开(公告)日：2023-07-18

申请号：US17004371

申请日：2020-08-27

Applicant: HITACHI, LTD.

Inventor： Nobuhiro Fukuda ,  Yuichi Nonaka ,  Yuto Komatsu ,  Charles Limasanches ,  Takashi Numata ,  Hironori Wakana ,  Masashi Kiguchi

IPC: A61B5/021 ,  A61B5/103 ,  A61B5/00 ,  A61B5/1171

CPC classification number: A61B5/02125 ,  A61B5/0077 ,  A61B5/1032 ,  A61B5/1176

Abstract: Provided is a biological information detection device including: an image acquisition unit that acquires an image composed of image signals including a plurality of wavelength components obtained by capturing reflected light from an object; a region division unit that divides the image into a plurality of regions for each frame; a local pulse wave detection unit that detects a pulse wave based on wavelength fluctuation between frames for each of the regions; and a blood pressure estimation unit that calculates propagation velocity of the pulse wave based on an appearance time difference of patterns of the pulse waves in two or more regions extracted based on an appearance order of the patterns of the pulse waves in the plurality of regions, and estimates a blood pressure based on the propagation velocity of the pulse wave.