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公开(公告)号：USD867208S1
公开(公告)日：2019-11-19
申请号：US29621467
申请日：2017-10-09
Applicant: Hitachi, Ltd. , Central Japan Railway Company , A & F Corporation
Designer： Yukinobu Abe , Tohru Watanabe , Kiyoshi Morita , Takashi Furukawa , Yuuji Ueno , Yasuhide Ueda , Hajime Ito , Yuichi Ahiko , Hiroki Shimoyama , Tadashi Fujii , Hideto Sanui , Kyohei Suzuki , Tetsuo Fukuda , Ichiro Fukuda
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公开(公告)号：US20200049752A1
公开(公告)日：2020-02-13
申请号：US16534305
申请日：2019-08-07
Applicant: Central Japan Railway Company , Koshin Seikosho, LTD.
Inventor： Yuichi Ahiko , Kotaro Nakamura , Kenichi Kitazawa , Hiroaki Shintani
IPC: G01R31/00
Abstract: Provided is an inspection device for contact strip that enables proper quality control of a collector head using a split-type contact strip. Disclosed is an inspection device for a collector head having an overhead contact line contact assembly that includes a contact strip, including electrically-conductive strip pieces aligned in a series and in a longitudinal direction, and springs elastically supporting the contact strip. The inspection device for a collector head includes a measurer of rigidity of the overhead contact line contact assembly in a thickness direction of the contact strip at multiple points on an axis parallel to the juxtaposition direction of the strip pieces; and a determiner of an abnormality in the collector head by comparison of measurement data of rigidity distribution at the multiple points based on measurement results from the measurer with reference data of rigidity distribution prepared beforehand.
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公开(公告)号：US20190391189A1
公开(公告)日：2019-12-26
申请号：US16447319
申请日：2019-06-20
Applicant: CENTRAL JAPAN RAILWAY COMPANY
Inventor： Hironobu Sunami , Kazuki Tanaka , Yoshitsugu Morita , Isamu Makara , Yuichi Ahiko , Kotaro Nakamura , Hiroki Shimoyama
Abstract: A collected current monitoring device is provided which includes a current-value obtaining unit that obtains a current value I1 and a current value I2, a first RMS-calculation unit that calculates a root mean square RMS1, a second RMS-calculation unit that calculates a root mean square RMS2, an Iu calculation unit that calculates an imbalance current Iu, a change calculation unit that calculates an amount of change ΔIu, an average calculation unit that calculates a time average value aveΔIu, a determining unit that determines whether the time average value aveΔIu is larger than a threshold value, and a signal output unit that outputs an abnormality signal when the time average value aveΔIu is larger than the threshold value.
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Patent Agency Ranking
公开(公告)号：US10377240B2
公开(公告)日：2019-08-13
申请号：US15771673
申请日：2016-11-01
Applicant: CENTRAL JAPAN RAILWAY COMPANY
Inventor： Yuichi Ahiko , Kotaro Nakamura , Hiroki Shimoyama
Abstract: A collected-current monitoring device includes a current-value obtaining unit for obtaining current values I1 and I2; a first RMS-calculation unit for calculating a root mean square (RMS) 1 of the current value I1 at a window width W; a second RMS-calculation unit for calculating a root mean square (RMS) 2 of the current value I2 at the window width W; a determining unit for determining whether a combination of the RMS 1 and the RMS 2 satisfies an abnormality condition; an abnormality-signal output unit for outputting an abnormality signal when the abnormality condition is satisfied; an information-obtaining unit for obtaining railway vehicle information; and a setting unit for setting a set-parameter that includes at least one of the window width W or the abnormality condition depending on the railway vehicle information.
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公开(公告)号：US10906403B2
公开(公告)日：2021-02-02
申请号：US16665306
申请日：2019-10-28
Applicant: Central Japan Railway Company
Inventor： Yuichi Ahiko , Kotaro Nakamura , Hiroki Shimoyama
Abstract: Provided is a collected current monitoring device enabling an analysis of collected current in each current collector while allowing a reduced equipment cost. The collected current monitoring device of the present disclosure is installed in a railroad vehicle including current collectors, main transformers, and main converters. The collected current monitoring device includes: a supply current sensor configured to measure a current supplied to a freely-selected one of the main transformers, at least one current-sensor-between-current-collectors disposed in each communication path connecting two adjacent ones of the current collectors and configured to measure a current flowing in the communication path, and a processor configured to calculate a current flowing in each of the current collectors based on the current measured by the supply current sensor and the current measured by the at least one current-sensor-between-current-collectors, and on a distribution ratio of the currents supplied to the main transformers.
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公开(公告)号：US10343526B2
公开(公告)日：2019-07-09
申请号：US15771673
申请日：2016-11-01
Applicant: CENTRAL JAPAN RAILWAY COMPANY
Inventor： Yuichi Ahiko , Kotaro Nakamura , Hiroki Shimoyama
Abstract: A collected-current monitoring device includes a current-value obtaining unit for obtaining current values I1 and I2; a first RMS-calculation unit for calculating a root mean square (RMS) 1 of the current value I1 at a window width W; a second RMS-calculation unit for calculating a root mean square (RMS) 2 of the current value I2 at the window width W; a determining unit for determining whether a combination of the RMS 1 and the RMS 2 satisfies an abnormality condition; an abnormality-signal output unit for outputting an abnormality signal when the abnormality condition is satisfied; an information-obtaining unit for obtaining railway vehicle information; and a setting unit for setting a set-parameter that includes at least one of the window width W or the abnormality condition depending on the railway vehicle information.
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公开(公告)号：US10828988B2
公开(公告)日：2020-11-10
申请号：US16081223
申请日：2017-03-01
Applicant: CENTRAL JAPAN RAILWAY COMPANY
Inventor： Yuichi Ahiko , Kotaro Nakamura , Hiroki Shimoyama
Abstract: Provided is a collected current monitoring device. A transformer current acquisition unit acquires a current value Ip of a current flowing through a part of a plurality of transformers. A total collected current calculation unit calculates a current value Iall of a collected current supplied by a plurality of current collectors from the current value Ip by using a following Equation (1): Iall=Ip×(Mall/Mp). A collected current acquisition unit acquires a current value IX of a collected current supplied by the current collector(s) other than one current collector. The collected current calculation unit calculates a current value IY of a collected current supplied by the one current collector by subtracting the current value IX from the current value Iall.
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公开(公告)号：USD884557S1
公开(公告)日：2020-05-19
申请号：US29588585
申请日：2016-12-21
Applicant: Hitachi, Ltd. , Central Japan Railway Company , A & F Corporation
Designer： Yukinobu Abe , Tohru Watanabe , Kiyoshi Morita , Takashi Furukawa , Yuuji Ueno , Hajime Ito , Yuichi Ahiko , Hiroki Shimoyama , Tadashi Fujii , Eiji Sato , Kyohei Suzuki , Tetsuo Fukuda , Ichiro Fukuda
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