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公开(公告)号：US20250130304A1
公开(公告)日：2025-04-24
申请号：US18681471
申请日：2022-08-24
Inventor： Tatsuo KOGA , Jin YOSHIZAWA , Kazuto URA
Abstract: A position estimation system includes: an obtainer that obtains image information of an image showing an indoor space in which a person is located; an estimator that estimates the coordinates of the person in the indoor space, on the basis of the image information obtained; and a position information obtainer that obtains position information of a first communication device from a positioning system. The estimator estimates the coordinates of a target first communication device held by the person, based on the coordinates of the person estimated and the position information obtained, and estimates the coordinates of an object other than the person in the indoor space, on the basis of a state of communication between a third communication device held by the object and the target first communication device, and the coordinates of the target first communication device estimated.
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公开(公告)号：US20230011371A1
公开(公告)日：2023-01-12
申请号：US17802632
申请日：2021-03-03
Inventor： Kazuya OHSHIMA , Tatsuo KOGA , Keita KANAMORI , Kazunori KIDERA
Abstract: An arc detection device includes: a current detector that includes a magnetic core penetrated by first and second paths and each connecting a DC power source and a device, and detects a current flowing through each of the first and second paths and in accordance with a magnetic field generated at the magnetic core; a low impedance circuit having a lower impedance than the DC power source and the device, the low impedance circuit being connected to the first path and the second path to cause a high frequency component to bypass one of the first path or the second path; and an arc determiner that determines an occurrence of an arc based on a current detected by the current detector. In the magnetic core, a direct current flows through the first path in a direction opposite to a direction in which a direct current flows through the second path.
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公开(公告)号：US20210194235A1
公开(公告)日：2021-06-24
申请号：US16757846
申请日：2018-09-21
Inventor： Tatsuo KOGA , Atsushi OKITA , Mitsuru KAJI
Abstract: An arc detection circuit includes a current detector and arc determination unit. The current detector detects a current flowing through a transmission line which connects an electric power supply device and an electric power conversion circuit. The arc determination unit calculates, from a result of measurement of the current, an area of interest and an area for comparison. The area of interest is an area of a region of interest defined by a predetermined frequency range and predetermined time for determination. The area for comparison is an area of a portion in which detected strength exceeds a predetermined strength threshold in the region of interest. The arc determination unit determines an electric arc has occurred when a ratio between the area of interest and the area for comparison exceeds a predetermined area-ratio threshold.
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公开(公告)号：US20230393218A1
公开(公告)日：2023-12-07
申请号：US18249334
申请日：2021-10-05
Inventor： Tatsuya TAKAHASHI , Tatsuo KOGA
CPC classification number: G01R31/58 , G01R31/086 , H04B3/46
Abstract: An arc detection system includes a first obtainment unit, a second obtainment unit, and a determination unit. The first obtainment unit obtains a measurement result of current flowing in a power line to which power is supplied from a power supply or a measurement result of voltage in the power line. The second obtainment unit obtains quality information about the quality of communication with a device connected to the power line through power line communication with the device via the power line. The determination unit determines whether or not an arc fault has occurred in the power line based on components in a specific frequency band of the measurement result obtained by the first obtainment unit and the quality information obtained by the second obtainment unit.
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公开(公告)号：US20230280387A1
公开(公告)日：2023-09-07
申请号：US18017691
申请日：2021-07-20
Inventor： Tatsuo KOGA , Kazunori KIDERA , Kazuya OHSHIMA , Takahiro OHORI , Keita KANAMORI
CPC classification number: G01R31/086 , G06F30/27
Abstract: An anomaly detection device that detects an anomaly in an object, the anomaly detection device includes: an analyzer that performs frequency analysis of sensing data obtained from a sensor that senses a physical quantity of the object; and a determiner that determines whether an anomaly is occurring in the object based on an output result output from a trained model by inputting frequency analysis data of the sensing data obtained from the sensor to the trained model that has been trained based on at least one of frequency analysis data of sensing data of the physical quantity obtained when the object is in a normal state or frequency analysis data of sensing data of the physical quantity obtained when the object is in an anomalous state.
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Patent Agency Ranking
公开(公告)号：US20230268740A1
公开(公告)日：2023-08-24
申请号：US18017140
申请日：2021-07-20
Inventor： Takahiro OHORI , Kazunori KIDERA , Tatsuo KOGA , Kazuya OHSHIMA , Keita KANAMORI
IPC: H02J3/38
CPC classification number: H02J3/38
Abstract: A power distribution system includes: a power distribution network that includes one or more connections to which a load is connectable; and a plurality of power supplies capable of supplying power to the power distribution network. Power is supplied to the power distribution network from at least one power supply of the plurality of power supplies. Adjacent power supplies included in the plurality of power supplies are arranged with a gap therebetween, and a connection included in the one or more connections is positioned in the gap.
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公开(公告)号：US20230384398A1
公开(公告)日：2023-11-30
申请号：US18249475
申请日：2021-10-05
Inventor： Tatsuya TAKAHASHI , Tatsuo KOGA
Abstract: An arc detection system includes a first obtainment unit, a second obtainment unit, and a determination unit. The first obtainment unit obtains a measurement result of current flowing in a power line to which power is supplied from a power supply or a measurement result of voltage in the power line. The second obtainment unit obtains operation information about operation of a device connected to the power line. The determination unit determines whether or not an arc fault has occurred in the power line based on the measurement result obtained by the first obtainment unit and the operation information obtained by the second obtainment unit.
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公开(公告)号：US20230341475A1
公开(公告)日：2023-10-26
申请号：US18247708
申请日：2021-10-05
Inventor： Tatsuya TAKAHASHI , Tatsuo KOGA
IPC: G01R31/58
CPC classification number: G01R31/58
Abstract: An arc detection system includes a first obtainment unit, a second obtainment unit, and a determination unit. The first obtainment unit obtains a measurement result of current flowing in a power line to which power is supplied from a power supply or a measurement result of voltage in the power line. The second obtainment unit obtains fluctuation information about a fluctuation in a load included in a device connected to the power line. The determination unit determines whether or not an arc fault has occurred in the power line based on components in a specific frequency band of the measurement result obtained by the first obtainment unit and the fluctuation information obtained by the second obtainment unit.
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9.发明公开公开(公告)号：US20230305047A1
公开(公告)日：2023-09-28
申请号：US18015056
申请日：2021-07-20
Inventor： Kazunori KIDERA , Tatsuo KOGA , Takahiro OHORI , Keita KANAMORI , Kazuya OHSHIMA
IPC: G01R31/00
CPC classification number: G01R31/002
Abstract: An arc detection device includes an obtainer and a determiner. The obtainer obtains a measurement result for a voltage applied to one target power supply line among a plurality of power supply lines to which power is supplied from a DC power source. The determiner determines, based on a component of a specific frequency band in the measurement result for the voltage obtained by the obtainer, whether there is a possibility of an arc fault occurring in the plurality of power supply lines.
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公开(公告)号：US20230094178A1
公开(公告)日：2023-03-30
申请号：US17908691
申请日：2021-03-03
Inventor： Tatsuo KOGA , Kazunori KIDERA , Keita KANAMORI
Abstract: An anomaly detection device includes: a determiner that determines whether the communication connection via a communication line connecting a DC/DC converter including a communication function and each of a DC/DC converter and an inverter has been lost; and an outputter that outputs an anomalous signal when it is determined that the communication connection has been lost.
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