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公开(公告)号：US10254625B2
公开(公告)日：2019-04-09
申请号：US15568755
申请日：2016-04-28
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Kenya Suzuki , Kei Kuwabara , Yuichi Higuchi , Mitsumasa Nakajima , Yuichiro Ikuma , Osamu Moriwaki , Tetsuo Takahashi , Naoki Ooba , Yuzo Ishii
Abstract: An optical signal processing device with a transponder aggregator function by which theoretical loss is not increased even if the number of necessary transponders is increased. Optical signals inputted from input ports are inputted to a PLC. The PLC has SBTs. The input ports are connected to the input-end SBT, and a plane wave is outputted from an output end of the PLC to the space side at an angle different for each input port. Optical signals outputted by the PLC are changed in their optical paths on the x-z plane by a cylindrical lens (Lsp) designed to refract optical signals in the x-axis direction, and are reflected by an LCOS at different regions corresponding to the positions of the input port. The reflected optical signals are incident on the output-end SBTs on the PLC, and are outputted to output ports via demultiplex parts.
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公开(公告)号：US12174662B2
公开(公告)日：2024-12-24
申请号：US17773959
申请日：2019-11-06
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Kei Kuwabara , Akio Tokura , Takako Ishihara , Toshiki Wada , Yuichi Higuchi , Yuki Hashimoto , Hiroyoshi Togo
Abstract: A wearable sensor device includes a temperature and humidity sensor that measures ambient environmental information around a living body. The temperature and humidity sensor is provided on an outer wall surface of a housing or provided to be separated from the outer wall surface. The outer wall surface of the housing faces a left or right side or diagonally downward when the wearable sensor device is attached to the living body and the living body is in a standing posture.
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公开(公告)号：US20230346291A1
公开(公告)日：2023-11-02
申请号：US18247848
申请日：2020-10-27
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Yuki Hashimoto , Kei Kuwabara , Nobuaki Matsuura
CPC classification number: A61B5/352 , A61B5/7225 , A61B5/366
Abstract: An RRI measurement device includes: a feature point detection unit configured to detect a feature point derived from an RS wave from a sampling data sequence of an electrocardiogram signal of a subject; a time estimation unit configured to search for two sampling points where a product of adjacent pieces of sampling data is zero or less in sampling data near the feature point and to estimate a time at which the electrocardiogram signal becomes zero using the two sampling points; and an RRI calculation unit configured to calculate an RRI on the basis of time-series data of the time estimated by the time estimation unit.
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公开(公告)号：US20230094123A1
公开(公告)日：2023-03-30
申请号：US17802052
申请日：2020-03-04
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Yuki Hashimoto , Takako Ishihara , Kei Kuwabara
IPC: A61B5/00
Abstract: A wearable device includes a base material including a first surface, a first flow path being formed in the base material, including one end that opens into the first surface, and extending along a direction toward a second surface opposite to the first surface of the base material, a second flow path being formed in the base material and including one end connected to another end of the first flow path and another end that opens into the second surface, a water absorbing structure that is provided on the second surface and absorbs sweat transported from the first flow path through the second flow path and secreted from skin of the living body, and a sensor that is disposed on the base material, detects an electrical signal deriving from a predetermined component included in the sweat flowing from the first flow path to the second flow path.
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公开(公告)号：US20230082487A1
公开(公告)日：2023-03-16
申请号：US17801870
申请日：2020-03-03
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Yuki Hashimoto , Takako Ishihara , Kei Kuwabara
IPC: A61B5/00
Abstract: A wearable device attached to a living body includes a substrate that forms a first flow path, a second flow path, and a third flow path, an electrode exposed to the first flow path, an electrode spaced apart from the electrode and exposed to the second flow path, and a sensor that detects, by using the electrodes, an electrical signal deriving from a predetermined component included in sweat that flows from the first flow path to the second flow path and is secreted from skin of the living body and outputs the electrical signal.
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Patent Agency Ranking
公开(公告)号：US20230059323A1
公开(公告)日：2023-02-23
申请号：US17785654
申请日：2019-12-19
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Akio Tokura , Kei Kuwabara , Takako Ishihara
Abstract: A wearable environmental sensor includes an environmental sensor arranged on a wall surface of a housing including a sealed section, the wall being in contact with an environment, and a protective structure formed around the environmental sensor, wherein the protective structure includes a plurality of ventilating holes, a sensor surface of the environmental sensor is arranged to face an opening of at least one of the ventilating holes, and an attaching part for attaching the environmental sensor to the wall surface comes into contact only with an edge of a sensor substrate of the environmental sensor and with a portion of a back face of the sensor substrate.
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公开(公告)号：US20230052347A1
公开(公告)日：2023-02-16
申请号：US17793819
申请日：2020-02-07
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Yuki Hashimoto , Takako Ishihara , Kei Kuwabara
Abstract: A particle arrangement transportation device includes: a base material in which is formed a flow channel from an inlet port-side opening through which a solution containing particles to be an object of arrangement and transportation is introduced to an outlet port-side opening; an electrode which is formed along the flow channel on a wall surface of the base material being exposed in the flow channel; electrodes which are formed along the flow channel in the base material on both sides of the flow channel; and a power supply which applies an AC voltage between the electrodes.
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公开(公告)号：US20220382325A1
公开(公告)日：2022-12-01
申请号：US17773959
申请日：2019-11-06
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Kei Kuwabara , Akio Tokura , Takako Ishihara , Toshiki Wada , Yuichi Higuchi , Yuki Hashimoto , Hiroyoshi Togo
Abstract: A wearable sensor device includes a temperature and humidity sensor that measures ambient environmental information around a living body. The temperature and humidity sensor is provided on an outer wall surface of a housing or provided to be separated from the outer wall surface. The outer wall surface of the housing faces a left or right side or diagonally downward when the wearable sensor device is attached to the living body and the living body is in a standing posture.
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公开(公告)号：US20220287599A1
公开(公告)日：2022-09-15
申请号：US17635888
申请日：2019-08-28
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Yuki Hashimoto , Takako Ishihara , Kei Kuwabara
Abstract: A wearable sensor includes: a base member that has a through hole serving as a flow path of liquid and a recess connecting with an end portion of the through hole on an outlet side; a water absorbing structure disposed on a surface of the base member on the outlet side to come into contact with the liquid flowing into the recess from an opening of the through hole on the outlet side; a laser diode that radiates light toward the liquid flowing into the recess from the opening of the through hole on the outlet side; and a photodiode that receives light from the laser diode transmitted through the liquid or light reflected by the liquid. An amount of perspiration of a wearer of the wearable sensor is calculated based on light receiving characteristics of the photodiode.
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公开(公告)号：US11406309B2
公开(公告)日：2022-08-09
申请号：US16978031
申请日：2019-03-01
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Rieko Sato , Nobuaki Matsuura , Kei Kuwabara , Takayuki Ogasawara
IPC: A61B5/00 , A61B5/316 , A61B5/304 , A61B5/0245
Abstract: A first calculation unit calculates the heart rate of a subject from a plurality of instantaneous heart rates by averaging processing with an IIR filter using a first coefficient. Note that the first coefficient is a numerical value less than 1, and is a fixed value. A second calculation unit calculates the heart rate of the subject from the plurality of instantaneous heart rates by averaging processing with an IIR filter using a second coefficient. The second coefficient is a numerical value less than 1, and is a variable value. A switching unit switches between the first calculation unit and the second calculation unit based on a difference between the precedingly calculated heart rate and a latest instantaneous heart rate.
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