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Patent Agency Ranking
公开(公告)号：US12203962B2
公开(公告)日：2025-01-21
申请号：US17442560
申请日：2020-02-25
Inventor： Yuta Sato , Hirohide Ichihashi , Kazutaka Ikeda
Abstract: A current measurement system is configured to measure an alternating-current (AC) current flowing through a conductor. The AC current has a frequency within a measurement range. The system includes a current sensor and a shunt resistor. The current sensor includes a measurement coil configured to be magnetically coupled to the conductor. The shunt resistor has both ends electrically connected to both ends of the measurement coil, respectively. An output voltage across the both ends of the shunt resistor is saturated at a saturation point in a saturation frequency of the frequency of the AC current. An upper limit value of the measurement range including the frequency is higher than a fundamental frequency of the AC current. The saturation frequency is higher than or equal to the upper limit value. The current measurement system improves sensitivity to frequency components higher than the fundamental frequency of the AC current.
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公开(公告)号：US11787057B2
公开(公告)日：2023-10-17
申请号：US17253548
申请日：2019-05-31
Inventor： Kenta Kamizono , Kazutaka Ikeda , Naofumi Shimasaki
IPC: B25J9/16
CPC classification number: B25J9/1674 , B25J9/163 , B25J9/1653
Abstract: A diagnostic system includes an acquirer configured to acquire current waveform data representing a waveform relating to a current supplied to a driving device of an apparatus and a determiner configured to determine a degree of abnormality in the apparatus from a varying portion of the waveform, the varying portion corresponding to a varying time period during which a rotation speed of the driving device increases or decreases.
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公开(公告)号：US11953528B2
公开(公告)日：2024-04-09
申请号：US17282646
申请日：2019-11-18
Inventor： Kazutaka Ikeda , Kenta Kamizono , Hiroto Nakano
IPC: G01R19/25 , G01R19/00 , G01R19/165 , G01P15/097 , G01P21/00
CPC classification number: G01R19/2509 , G01R19/0092 , G01R19/165 , G01P15/097 , G01P21/00
Abstract: A diagnosis system is configured to diagnose an apparatus including a driver device. The system includes an acquisition unit configured to acquire waveform data indicating a waveform related to a current to be supplied to the driver device, and a determination unit configured to determine a condition of the apparatus. The determination unit is configured to obtain, based on the waveform data, a change caused by a component of a force in a particular direction applied to the driver device, and to determine the condition of the apparatus based on the obtained change. The diagnosis device determines the condition of the apparatus accurately.
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公开(公告)号：US11544554B2
公开(公告)日：2023-01-03
申请号：US16468830
申请日：2018-01-26
Inventor： Naofumi Shimasaki , Kazutaka Ikeda
Abstract: A determiner which learns acceleration measurement data which has been obtained by an accelerated aging test and indicates that a facility changes from a normal state to an aged state, and advance label data which is obtained by giving a label to data indicating characteristics of aging in the acceleration measurement data. Measurement data of aging diagnosis is obtained from the facility which is operating, teacher aging degree label data is found from a record of maintenance of the facility, and additional data is obtained from the measurement data and the teacher aging degree label data. When a difference between predicted aging degree label data and teacher aging degree label data is greater than a predetermined value, learning data is selected as additional learning data. The additional learning data is learned to update the determiner.
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公开(公告)号：US20190332936A1
公开(公告)日：2019-10-31
申请号：US16468830
申请日：2018-01-26
Inventor： Naofumi Shimasaki , Kazutaka Ikeda
Abstract: A determiner which learns acceleration measurement data which has been obtained by an accelerated aging test and indicates that a facility changes from a normal state to an aged state, and advance label data which is obtained by giving a label to data indicating characteristics of aging in the acceleration measurement data. Measurement data of aging diagnosis is obtained from the facility which is operating, teacher aging degree label data is found from a record of maintenance of the facility, and additional data is obtained from the measurement data and the teacher aging degree label data. When a difference between predicted aging degree label data and teacher aging degree label data is greater than a predetermined value, learning data is selected as additional learning data. The additional learning data is learned to update the determiner.
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