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公开(公告)号：US20200337573A1
公开(公告)日：2020-10-29
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：US20200152225A1
公开(公告)日：2020-05-14
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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3.发明申请公开(公告)号：US20190125197A1
公开(公告)日：2019-05-02
申请号：US15941471
申请日：2018-03-30
Applicant: Hitachi, Ltd.
Inventor： Nobuhiro FUKUDA , Masashi KIGUCHI , Akiko NAKAJIMA , Takashi NUMATA , Hironori WAKANA , Masuyoshi YAMADA
Abstract: A biological information detection apparatus includes: a camera; a frame image analysis unit that detects a region including pixels having a predetermined skin color, as a skin color region, from a frame image taken using the camera, and detects a signal corresponding to a light wavelength from an image signal of each pixel included in the skin color region, as skin color wavelength data; a skin color wavelength difference detection unit that calculates an average value of differences of the skin color wavelength data from predetermined reference wavelength data for the pixels included in the skin color region, and acquires the average value as average wavelength difference data; a pulse wave signal detection unit that detects a signal obtained by smoothing the average wavelength difference data detected in time series, as a pulse wave signal.
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4.发明申请公开(公告)号：US20180221621A1
公开(公告)日：2018-08-09
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 , H04N21/439 , H04N21/414
CPC classification number: A61M21/02 , A61M2021/0027 , A61M2021/005 , A61M2205/3306 , A61M2205/332 , A61M2205/502 , A61M2205/52 , A61M2230/63 , G06F1/1694 , G06F3/012 , G06F3/165 , H04N21/41422 , H04N21/439 , H04N21/44008 , H04N21/44218
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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公开(公告)号：US20210030285A1
公开(公告)日：2021-02-04
申请号：US16942862
申请日：2020-07-30
Applicant: HITACHI, LTD.
Inventor： Nobuhiro FUKUDA , Hironori WAKANA , Takashi NUMATA
IPC: A61B5/021 , A61B5/026 , A61B5/0285 , A61B5/103 , G06T5/00
Abstract: A biological information detection device is robust to color change of external light or illumination light. The biological information detection device includes: an image acquiring section that acquires image information by taking an image of the face of a living body; a blood flow analyzing section that corrects the image information according to the Retinex theory for color constancy, outputs hue information in the corrected image information as blood flow information, and outputs skin area mark information indicating the position of a given skin area in the face; and a local pulse wave detecting section that obtains, from the blood flow information of the skin area corresponding to the skin area mark information, pulse information of the skin area.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20200155008A1
公开(公告)日：2020-05-21
申请号：US16666821
申请日：2019-10-29
Applicant: Hitachi, Ltd.
Inventor： Nobuhiro FUKUDA , Tomoyuki ISHII , Masayoshi ISHIBASHI
Abstract: The biological information detecting apparatus includes a face detecting section detecting the face of a person from an image signal, an expression detecting section detecting an expression of the person from the image signal of the region of the face to calculate an expression feature amount, a pulse wave detecting section detecting a pulse wave of a blood flow of the person from the image signal of the region of the face, a scoring section calculating a score of the expression of the person based on the expression feature amount, a coaching section generating an expression guide, and a display section displaying the expression guide, and the display section further displays biological information indicating a state of the autonomic nerve of the person calculated based on the pulse wave after displaying the expression guide, and the score calculated based on the expression feature amount.
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7.发明申请公开(公告)号：US20190350505A1
公开(公告)日：2019-11-21
申请号：US16414280
申请日：2019-05-16
Applicant: HITACHI, LTD.
Inventor： Nobuhiro FUKUDA , Masashi KIGUCHI
IPC: 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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公开(公告)号：US20210085196A1
公开(公告)日：2021-03-25
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 , A61B5/1171 , A61B5/00 , A61B5/103
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：US20200334516A1
公开(公告)日：2020-10-22
申请号：US16817801
申请日：2020-03-13
Applicant: HITACHI, LTD.
Inventor： Mitsuharu TAI , Jun FURUYA , Nobuhiro FUKUDA , Tadashi OKUMURA , Masahiko ANDO
Abstract: A computer generates a model for outputting an output value on the basis of a plurality of pieces of time-series data having different data types. The model includes a network that is for hied of connections of nodes having a recursive structure and updates states of the nodes according to a predetermined time step, and an adder that calculates the output value. The computer comprises: a learning unit configured to execute, for each of a plurality of output values, a learning process of calculating weight data including the plurality of weights by using learning data and a first storing unit configured to store a plurality of learning results each of which correlates a type of the output value and the weight data with each other.
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公开(公告)号：US20180150682A1
公开(公告)日：2018-05-31
申请号：US15826200
申请日：2017-11-29
Applicant: HITACHI, LTD.
Inventor： Nobuhiro FUKUDA , Akira DATE , Hidenori SAKANIWA , Takashi KANEMARU
CPC classification number: G06K9/00255 , G06K9/00268 , G06K9/4652 , G06K9/6202
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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