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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.
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公开(公告)号：US11281891B2
公开(公告)日：2022-03-22
申请号：US16656762
申请日：2019-10-18
Applicant: Hitachi, Ltd.
Inventor： Nobuhiro Fukuda , Hironori Wakana , Masuyoshi Yamada
Abstract: A biological-information detection device includes a video input section accepting video signals including three wavelength components in an infrared region of reflected light from an object, a wavelength detecting section acquiring a wavelength and an intensity of the reflected light from the video signals, a face feature amount detecting section detecting a plurality of feature points of a face based on the video signals, a measurement target area identifying section identifying a measurement target area on a basis of the plurality of feature points of the face detected, a wavelength fluctuation detecting section detecting a difference between a wavelength of reflected light from the measurement target area at a certain point in time and a wavelength of reflected light at a point in time preceding the certain point in time, and a pulse wave detecting section detecting a change in the detected difference according to the point in time.
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3.发明授权公开(公告)号：US10814095B2
公开(公告)日：2020-10-27
申请号：US15888963
申请日：2018-02-05
Applicant: HITACHI, LTD.
Inventor： Takashi Kanemaru , Nobuhiro Fukuda
IPC: A61M21/02 , G06F3/16 , G06F3/01 , H04N21/44 , H04N21/414 , H04N21/439 , G06F1/16 , H04N21/442 , A61M21/00
Abstract: An apparatus includes a first acquisition unit acquiring head position information indicating a user's head movement, a second acquisition unit acquiring stimulus information relating to a stimulus input to visual and vestibular sense. A generation unit that generates sound data of sound effect generating movement of a body which reduces sickness based on the head position information and the stimulus information, and calculates a variation amount of the user's head position based on the head position information, calculates an estimation amount for a magnitude of the stimulus input to at least any one of visual and vestibular sense based on the stimulus information, calculates sickness feeling intensity based on the variation amount and the estimation amount, calculates a reduction amount for calculating a feature amount of the sound data based on the sickness feeling intensity, and calculates a feature amount of the sound data based on the reduction amount.
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Patent Agency Ranking
公开(公告)号：US11276420B2
公开(公告)日：2022-03-15
申请号：US16596809
申请日：2019-10-09
Applicant: Hitachi, Ltd.
Inventor： Takashi Numata , Yasuhiro Asa , Nobuhiro Fukuda
Abstract: An interaction system that provides an interaction interface comprising: a computer and a device that obtains information, wherein the computer stores information for managing data in which a type of a second feature value is associated with a listening pattern that defines a tendency of a response action performed by the interaction interface on a user; calculates a first feature value that is an index for evaluating a change in state during speech by the user on the basis of information obtained by the device; calculates second feature values on the basis of the first feature value; selects a target second feature value from among the second feature values; selects the listening pattern corresponding to the target second feature value; and generates output information for controlling the interaction interface on the basis of the selected listening pattern.
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公开(公告)号：US11547309B2
公开(公告)日：2023-01-10
申请号：US16818189
申请日：2020-03-13
Applicant: HITACHI, LTD.
Inventor： Nobuhiro Fukuda , Masashi Kiguchi , Takashi Numata , Hironori Wakana
Abstract: A biological information detection device includes: a video capture unit, a blood flow analysis unit, a local pulse wave detection unit, a pulse wave propagation velocity calculation unit, and a blood pressure estimation unit. The video capture unit obtains video information on a face of a living body. The blood flow analysis unit analyzes video data of at least three skin areas in the video information, as blood flow information. The local pulse wave detection unit is provided for each skin area to calculate pulse information based on the blood flow information sequenced chronologically. The pulse wave propagation velocity calculation unit calculates a pulse wave propagation velocity based on a phase difference between pieces of the pulse information at each skin area calculated by the local pulse wave detection unit. The blood pressure estimation unit estimates blood pressure based on the pulse wave propagation velocity.
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公开(公告)号：US11315359B2
公开(公告)日：2022-04-26
申请号：US16656762
申请日：2019-10-18
Applicant: Hitachi, Ltd.
Inventor： Nobuhiro Fukuda , Hironori Wakana , Masuyoshi Yamada
Abstract: A biological-information detection device includes a video input section accepting video signals including three wavelength components in an infrared region of reflected light from an object, a wavelength detecting section acquiring a wavelength and an intensity of the reflected light from the video signals, a face feature amount detecting section detecting a plurality of feature points of a face based on the video signals, a measurement target area identifying section identifying a measurement target area on a basis of the plurality of feature points of the face detected, a wavelength fluctuation detecting section detecting a difference between a wavelength of reflected light from the measurement target area at a certain point in time and a wavelength of reflected light at a point in time preceding the certain point in time, and a pulse wave detecting section detecting a change in the detected difference according to the point in time.
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公开(公告)号：US10691924B2
公开(公告)日：2020-06-23
申请号：US15826200
申请日：2017-11-29
Applicant: HITACHI, LTD.
Inventor： Nobuhiro Fukuda , Akira Date , Hidenori Sakaniwa , Takashi Kanemaru
Abstract: A pulse detection method resistant to changes in an imaging environment is provided.A biological information detection device includes an imaging unit that images reflected light from a target object and outputs a video signal including a plurality of wavelength components, a reflected light analysis unit that obtains a wavelength and an intensity of the reflected light from the video signal, a wavelength fluctuation detection unit that detects difference between the wavelength of the reflected light of each time and the wavelength of the reflected light of a time before each of the time, and a pulse detecting unit that detects a change in accordance with a time of the detected difference as a pulse.
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公开(公告)号：US10881338B2
公开(公告)日：2021-01-05
申请号：US16414280
申请日：2019-05-16
Applicant: HITACHI, LTD.
Inventor： Nobuhiro Fukuda , Masashi Kiguchi
IPC: A61B5/00 , A61B5/1455 , H04N5/33 , G06T7/90 , G06T7/00
Abstract: A biological information detection apparatus for measuring a SpO2 without contact from a distant position includes a camera that acquires an image with visible and infrared light, a first wavelength fluctuation detection section detects a temporal variation of a wavelength of an image with the visible light to generate a first wavelength difference data signal, a first amplitude detection section detects an amplitude of the first wavelength difference data signal, a second wavelength fluctuation detection section detects a temporal variation of a wavelength of an image with the infrared light to generate a second wavelength difference data signal, a second amplitude detection section detects an amplitude of the second wavelength difference data signal, a ratio calculation section calculates a ratio between the amplitudes of the first and second wavelength difference data signals, and an oxygen saturation concentration calculation section calculates an oxygen saturation concentration based on the calculated amplitude ratio.
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