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公开(公告)号：US20240016451A1
公开(公告)日：2024-01-18
申请号：US18256400
申请日：2020-12-08
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Kei Kuwabara , Kenichi Matsunaga , Takayuki Ogasawara
CPC classification number: A61B5/6802 , A61B5/346 , A61B5/0022 , A61B5/301 , A61B2560/0242
Abstract: A measurement system includes a measurement unit configured to perform measurement a plurality of times on the basis of a first clock signal having a first clock period to obtain a plurality of measurement results, a time stamp provision unit configured to provide a time stamp indicating a measurement time to each measurement result obtained in the second period among the plurality of measurement results obtained using the measurement unit the basis of a second clock signal having a second clock period longer than the first clock period and having better period accuracy than the first clock signal, and a measurement time correction unit configured to correct a measurement time of a measurement result in accordance with a period specified using two time stamps and the number of measurement results obtained during the period.
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公开(公告)号：US20230240548A1
公开(公告)日：2023-08-03
申请号：US18007886
申请日：2020-06-23
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Nobuaki Matsuura , Kei Kuwabara , Yuichi Higuchi , Takako Ishihara
IPC: A61B5/0245 , A61B5/339 , A61B5/346 , A61B5/00
CPC classification number: A61B5/0245 , A61B5/339 , A61B5/346 , A61B5/7242 , A61B5/7246 , A61B5/7221
Abstract: According to the present disclosure, a heart rate detection method includes measuring an ECG waveform, calculating a heart rate from the ECG waveform, calculating a difference value of a potential of the ECG waveform between sampling time points, calculating an integrated value obtained by integrating the difference value between a measurement time point and any time point before measurement, and determining whether the heart rate at the measurement time point is to be displayed, by comparing the integrated value to a reference value.
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公开(公告)号：US20230000440A1
公开(公告)日：2023-01-05
申请号：US17781184
申请日：2019-12-04
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Yuki Hashimoto , Kei Kuwabara , Nobuaki Matsuura
IPC: A61B5/00 , A61B5/0245 , A61B5/352
Abstract: A heartbeat detection device includes: a sensor data acquisition unit that acquires sensor data indicating an electrocardiographic waveform of a living body and outputs a sampling data sequence D(i) based on the sensor data; a first calculation unit that calculates a temporal difference value DY(i) of sampling data D(i) from the output sampling data sequence D(i) for each sampling time; a determination unit that determines a heartbeat time on the basis of a time at which a change in the calculated temporal difference value DY(i) exceeds a set threshold; a correction unit that corrects the heartbeat time by using a reference time; and a heart rate calculation unit that calculates a heart rate of the living body from the corrected heartbeat time.
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公开(公告)号：US20220397460A1
公开(公告)日：2022-12-15
申请号：US17783523
申请日：2019-12-19
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Akio Tokura , Kei Kuwabara , Takako Ishihara , Hiroyoshi Togo
Abstract: A wearable environmental sensor is configured to measure environmental information regarding a place where the device is worn, and includes a black-bulb temperature sensor including a black bulb and a temperature sensor for measuring internal temperature in the black bulb, the black-bulb temperature sensor being in a housing, wherein the black bulb includes an insertion hole into which the temperature sensor is inserted, the black bulb includes a weld portion welded to the housing, in an outer-circumferential portion of the bottom surface, the black bulb includes a guide portion in an outer-circumferential portion around the insertion hole, the housing includes an insertion opening into which the guide portion of the black bulb is inserted, the housing includes a protruding portion at an outer-circumferential portion around the insertion opening, and the guide portion is supported by the protruding portion.
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公开(公告)号：US20220349758A1
公开(公告)日：2022-11-03
申请号：US17774420
申请日：2019-11-07
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Akio Tokura , Kei Kuwabara , Hiroto Matsuura , Takako Ishihara , Toshiki Wada , Yuichi Higuchi , Yuki Hashimoto
Abstract: A wearable environmental sensor device includes a temperature/humidity sensor disposed on a wall surface of a housing that is exposed to an environment and configured to measure ambient environmental information around a living body, and a protective structure formed around the temperature/humidity sensor. The temperature/humidity sensor is disposed, directly or via a support structure, on or over the wall surface of the housing, wherein the wall surface faces substantially downward from the living body when the wearable environmental sensor device is attached to the living body and the living body is in a standing posture. The protective structure has respective ventilation holes provided in two or more pairs of opposed surfaces thereof each facing in a direction other than a vertical direction of the living body when the wearable environmental sensor device is attached to the living body and the living body is in the standing posture.
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Patent Agency Ranking
公开(公告)号：US20210000366A1
公开(公告)日：2021-01-07
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: A61B5/04 , A61B5/0245 , A61B5/0428 , A61B5/00
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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公开(公告)号：US10881315B2
公开(公告)日：2021-01-05
申请号：US15502995
申请日：2015-08-04
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Kei Kuwabara , Takayuki Ogasawara , Nobuaki Matsuura , Michiko Seyama , Hiroshi Koizumi , Ryusuke Kawano , Kazuhiko Takagahara , Kazuyoshi Ono , Takako Ishihara , Yasuhiro Sato , Shingo Tsukada , Nahoko Kasai , Koji Sumitomo
IPC: A61B5/0456 , A61B5/0452 , A61B5/0404 , A61B5/0428 , A61B5/00 , A61B5/0205 , A61B5/04 , A61B5/0408
Abstract: In a biological signal measurement system of this invention, biological digital data is generated from a biological signal measured by a biological signal measurement apparatus, and first feature amount data extracted from the biological digital data and downsized biological digital data are transmitted to a portable terminal. In a biological information measurement apparatus of this invention, biological feature amount data is extracted from measured biological waveform data, and at least one of the biological waveform data and the biological feature amount data is transmitted to an external device. It is possible to provide a biological signal measurement system capable of continuously measuring a biological signal for a long time without disturbing daily life and provide a biological information measurement apparatus capable of implementing downsizing and long life of a battery.
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公开(公告)号：US20250068212A1
公开(公告)日：2025-02-27
申请号：US18945899
申请日：2024-11-13
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：US20230233130A1
公开(公告)日：2023-07-27
申请号：US18007939
申请日：2020-06-23
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Nobuaki Matsuura , Kei Kuwabara , Yuichi Higuchi , Takako Ishihara
Abstract: According to the present disclosure, a heart rate detection method includes measuring an ECG waveform, calculating an R-R interval from the ECG waveform, calculating an instantaneous heart rate from the R-R interval, calculating an index based on the instantaneous heart rate, and determining whether the heart rate obtained from the R-R interval is to be displayed, by comparing the index to a reference value.
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公开(公告)号：US20230050667A1
公开(公告)日：2023-02-16
申请号：US17792984
申请日：2020-01-29
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Yuki Hashimoto , Takako Ishihara , Kei Kuwabara
Abstract: A concentration device includes a substrate that has a flow path formed therein extending from an inlet-side opening into which a liquid to be concentrated is introduced to an outlet-side opening, and a desiccant that is disposed in containing spaces in the substrate to face a liquid in the flow path across air layers.
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