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    OPTIMIZED EXTREMELY-LARGE MAGNETIC FIELD MEASURING METHOD AND DEVICE
    2.
    发明申请
    OPTIMIZED EXTREMELY-LARGE MAGNETIC FIELD MEASURING METHOD AND DEVICE 审中-公开

    公开(公告)号：US20190277924A1

    公开(公告)日：2019-09-12

    申请号：US16462417

    申请日：2017-06-28

    申请人： TSINGHUA UNIVERSITY ,  SICHUAN ENERGY INTERNET RESEARCH INSTITUTE, TSINGHUA UNIVERSITY

    发明人： Jun HU ,  Yong OUYANG ,  Jinliang HE ,  Shanxiang WANG ,  Gen ZHAO ,  Zhongxu WANG ,  Rong ZENG ,  Chijie ZHUANG ,  Bo ZHANG ,  Zhanqing YU

    IPC分类号： G01R33/09

    摘要： An optimized extremely-large magnetic field measuring method includes: placing four orthogonally configured tunneling magnetoresistive resistors into an externally applied magnetic field, acquiring the resistances of the tunneling magnetoresistive resistors; calculating the angle between a magnetization direction of a free layer of each tunneling magnetoresistive resistor and that of a reference layer on the basis of the resistances of the four resistors; calculating magnetic field intensity H1 and direction θ1 of the externally applied magnetic field; calculating magnetic field intensity H2 and direction θ2 of the externally applied magnetic field; and determining final magnetic field intensity H0 of the externally applied magnetic field on the basis of magnetic field intensity H1 and of magnetic field intensity H2; determining final direction θ of the externally applied magnetic field on the basis of direction θ2 and of direction θ1; and optimizing on the basis of direction θ and of magnetic field intensity H0.

    MODIFIED FLEXIBLE POLYPROPYLENE INSULATING MATERIAL AND PREPARATION METHOD AND USE THEREOF
    3.
    发明公开
    MODIFIED FLEXIBLE POLYPROPYLENE INSULATING MATERIAL AND PREPARATION METHOD AND USE THEREOF 审中-公开

    公开(公告)号：US20240352241A1

    公开(公告)日：2024-10-24

    申请号：US18294627

    申请日：2022-08-03

    申请人： CHINA PETROLEUM & CHEMICAL CORPORATION ,  BEIJING RESEARCH INSTITUTE OF CHEMICAL INDUSTRY, CHINA PETROLEUM & CHEMICAL CORPORATION ,  TSINGHUA UNIVERSITY

    发明人： Qing SHAO ,  Jinliang HE ,  Hao YUAN ,  Qi LI ,  Yaru ZHANG ,  Jun HU ,  Mingdi WANG ,  Shangshi HUANG ,  Juan LI ,  Shixun HU ,  Qi ZHANG ,  Dali GAO ,  Hongwei SHI

    IPC分类号： C08L23/12 ,  H01B3/44

    CPC分类号： C08L23/12 ,  H01B3/441 ,  C08L2205/22 ,  C08L2312/00

    摘要： The invention belongs to the field of insulating materials, in particular cable insulating materials, and particularly relates to a modified flexible polypropylene insulating material, and preparation method and use thereof. The modified flexible polypropylene insulating material comprises a propylene-based continuous phase, and a rubber phase and a grafted phase derived from an unsaturated bond-containing polymerizable monomer dispersed in the propylene-based continuous phase; wherein, the modified flexible polypropylene insulating material has a content of xylene solubles of 10-55 wt %, preferably 15-45 wt %, more preferably 18-40 wt %, and still more preferably 20-40 wt %, based on the total weight of the modified flexible polypropylene insulating material; the content of structural units derived from the unsaturated bond-containing polymerizable monomer and in a grafted state in the modified flexible polypropylene insulating material is 0.3-6 wt %, and preferably 0.7-5 wt %; the flexural modulus of the modified flexible polypropylene insulating material is 200-1000 MPa, preferably 200-950 MPa, more preferably 200-700 MPa, and still more preferably 250-600 MPa; preferably, the ratio of the mass of the structural units derived from the unsaturated bond-containing polymerizable monomer in xylene insolubles to the mass of the structural units derived from the unsaturated bond-containing polymerizable monomer in the modified flexible polypropylene insulating material is more than 0.1, preferably 0.3-0.9. The modified flexible polypropylene insulating material of the invention can give consideration to both mechanical property and electrical property at a higher working temperature, and is suitable for working conditions of high temperature and high operating field strength.

    PCB-INTEGRATED LEAD MAGNETIC FIELD ENERGY EXTRACTION APPARATUS BASED ON ELECTROMAGNETIC INDUCTION PRINCIPLE
    6.
    发明申请
    PCB-INTEGRATED LEAD MAGNETIC FIELD ENERGY EXTRACTION APPARATUS BASED ON ELECTROMAGNETIC INDUCTION PRINCIPLE 审中-公开

    公开(公告)号：US20190222097A1

    公开(公告)日：2019-07-18

    申请号：US16321334

    申请日：2017-07-27

    申请人： Tsinghua University

    发明人： Jun HU ,  Zhongxu WANG ,  Jinliang HE ,  Shanxiang WANG

    IPC分类号： H02K7/18 ,  H02K35/02 ,  H05K1/18 ,  H01F27/28

    CPC分类号： H02K7/18 ,  H01F27/2804 ,  H02K35/02 ,  H05K1/181

    摘要： A PCB-integrated electromagnetic-induction-principle-based power-line magnetic field energy harvester includes a PCB, the PCB including a substrate and a coil; a rotatable permanent magnet assembly, rotatably embedded in the middle through hole; and a fixed permanent magnet arranged opposite the rotatable permanent magnet assembly and providing the rotatable permanent magnet assembly with a direct current bias magnet field. The PCB-integrated electromagnetic-induction-principle-based power-line magnetic field energy harvester is driven by both of the AC magnetic field generated by the power line and the DC bias magnetic field generated by the fixed permanent magnet. The magnetic field energy around the power line is thus converted into the mechanical energy of the rotatable permanent magnet. The mechanical energy is then converted into the electric energy in the coil. The electric energy is supplied to the following low-power electronic devices (e.g. sensors) in a power transmission system.