公开(公告)号：US20210296937A1

公开(公告)日：2021-09-23

申请号：US17209310

申请日：2021-03-23

Applicant: University of Electronic Science and Technology of China

Inventor： Xianzheng ZONG ,  Zaiping NIE ,  Wen XIONG ,  Jun HU ,  Shiwen YANG ,  Xuyu YE ,  Xiaofeng QUE ,  Yongpin CHEN

IPC: H02J50/23 ,  H01Q9/04 ,  H02J50/80 ,  H01Q1/24 ,  H02J50/00 ,  H02J50/40

Abstract: The disclosure provides a wireless charging device including a metal frequency-selective box and an internal charging system disposed inside the metal frequency-selective box for wireless charging. The internal charging system includes a multi-antenna subsystem including N antenna units; N is an integer greater than 2, and the antenna units are dipole antennas, microstrip patch antennas, microstrip slot antennas, helical antennas, or dielectric resonator antennas. The N antenna units are evenly disposed, in a two-dimensional ring, on inner sides of four side faces of the metal frequency-selective box, or disposed on a three-dimensional curved surface of the entire inner side of the metal frequency-selective box. The device to be energized is disposed in the metal frequency-selective box and is surrounded by the N antenna units.

公开(公告)号：US20230305181A1

公开(公告)日：2023-09-28

申请号：US17851348

申请日：2022-06-28

Applicant: University of Electronic Science and Technology of China

Inventor： Guoyun GUAN ,  Min MENG ,  Jun HU ,  Zaiping NIE

IPC: G01V3/28 ,  G01V3/30

CPC classification number: G01V3/28 ,  G01V3/30

Abstract: A method of reducing or rejecting common mode interference and a circuit for electromagnetic induction logging with improved common mode interference reduction or rejection are disclosed, which are useful in the field of electromagnetic induction logging technology. Accurate formation signals are calculated based on phases and amplitudes of common mode signals, which do not change with the coil access mode, and phases of differential signals, which are reversed with amplitudes unaltered when the coil is connected reversely. This provides a mechanism to effectively eliminate the influence of common mode interference even when the common mode interference is greater in amplitude than the signals from a geological formation.

公开(公告)号：US20170294796A1

公开(公告)日：2017-10-12

申请号：US15387813

申请日：2016-12-22

Applicant: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Zaiping NIE ,  Yuan YANG ,  Xianzheng ZONG

IPC: H02J7/02 ,  H02J50/27 ,  H02J50/23 ,  H02J50/40

CPC classification number: H02J7/025 ,  A61N1/3787 ,  H02J50/23 ,  H02J50/27 ,  H02J50/40

Abstract: Embodiments provide focused wireless charging method and apparatus based on radio frequency receiving and phase compensation retransmission. The method is based on the reciprocity principle, making each charging signal transmitted by the external charging system could stack in-phase when arriving at the embedded rechargeable battery, realizing wireless near field focusing in any given area in an unknown complex inhomogeneous propagation environment and a high charging efficiency. The focused wireless charging technology based on radio frequency receiving and phase compensation retransmission in embodiments could realize in-phase stacking and precise focus of each wireless charging signal of the external system on the embedded batteries to be charged automatically under different propagation environment, different environment medium, and possible random offset of the rechargeable battery. This method has strong environmental adaptability, high energy transmission efficiency, transmission stability, less radiation to human body and no need of accurate information of the location of charging equipment.