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公开(公告)号：US11374395B2
公开(公告)日：2022-06-28
申请号：US16729280
申请日：2019-12-27
Applicant: Huawei Technologies Co., Ltd.
Inventor： Guoqing Zhang , Andreas Stiedl , Zhiming Xiao , Michael Tabakov
Abstract: A remote power unit for providing direct current power to a remote power receiver in a direct current power system is provided. A residual current protection circuit comprises a first switch, which opens a positive voltage rail, and a second switch, which open a negative voltage rail. A first current sensor measures a first residual current between the first switch and the remote power receiver, while the first switch is closed and the second switch is opened. A second current sensor measures a second residual current between the second switch and the remote power receiver, while the second switch is closed and the first switch is open. A controller detects a residual current event, if the first residual current and/or the second residual current are above a residual current threshold.
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公开(公告)号：US12069830B2
公开(公告)日：2024-08-20
申请号：US17373313
申请日：2021-07-12
Applicant: Huawei Technologies Co., Ltd.
Inventor： Guoqing Zhang , Jiangtao Wang , Liang Gao
CPC classification number: H05K7/1455 , H01R13/04 , H01R13/10 , H01R13/71 , H02M3/33592
Abstract: An alternating current/direct current input device includes an appliance input socket and an information and communications technology (ICT) device. The ICT device is powered by the appliance input socket. The appliance input socket includes a ground contact, a positive electrode contact, a negative electrode contact, and a signal switch. A contact depth of the signal switch in the appliance input socket is less than a contact depth of the positive electrode contact or the negative electrode contact in the appliance input socket. The signal switch is configured to generate a control signal when a direct current connector is separated from the appliance input socket. The control signal can be used to enable the ICT device to disconnect the appliance input socket from a conductive electrode of the direct current connector after the ICT device enters a no load state.
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公开(公告)号：US11096303B2
公开(公告)日：2021-08-17
申请号：US16448296
申请日：2019-06-21
Applicant: Huawei Technologies Co., Ltd.
Inventor： Guoqing Zhang , Jiangtao Wang , Liang Gao
Abstract: An alternating current/direct current input device includes an appliance input socket and an information and communications technology (ICT) device. The ICT device is powered by the appliance input socket. The appliance input socket includes a ground contact, a positive electrode contact, a negative electrode contact, and a signal switch. A contact depth of the signal switch in the appliance input socket is less than a contact depth of the positive electrode contact or the negative electrode contact in the appliance input socket. The signal switch is configured to generate a control signal when a direct current connector is separated from the appliance input socket. The control signal can be used to enable the ICT device to disconnect the appliance input socket from a conductive electrode of the direct current connector after the ICT device enters a no load state.
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公开(公告)号：US10935671B2
公开(公告)日：2021-03-02
申请号：US16440957
申请日：2019-06-13
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yi Zhang , Guoqing Zhang , Feng Zhou , Quanfeng Zhang
Abstract: Embodiments provide a positioning method, an assistant site, and a system, to improve positioning accuracy of a mobile terminal. The method according to the embodiments of the present invention includes: generating, by an assistant site, a downlink assisted positioning signal; and sending, by the assistant site, the downlink assisted positioning signal to a mobile terminal. The downlink assisted positioning signal can enable a base station to determine position information of the mobile terminal based on a measurement result obtained by the mobile terminal by measuring the downlink assisted positioning signal.
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