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公开(公告)号：US20190339342A1
公开(公告)日：2019-11-07
申请号：US16462395
申请日：2017-06-28
发明人： Jinliang HE , Yong OUYANG , Jun HU , Shanxiang WANG , Gen ZHAO , Zhongxu WANG , Rong ZENG , Chijie ZHUANG , Bo ZHANG , Zhanqing YU
IPC分类号： G01R33/09
摘要： A wide magnetic field range measuring method includes the measurement step for a medium-and-large magnetic field and the measurement step for an extremely large magnetic field. In addition to that, the method further includes: Step 1: placing four orthogonally-configured magnetic resistance resistors into an external magnetic field and obtaining the resistance value of each magnetic resistance resistor; Step 2: substituting the resistance values of two mutually orthogonal magnetic resistance resistors into the measurement step for a medium-and-large magnetic field for calculation; if calculation process converges, then, determining that the external magnetic field as a medium-and-large magnetic field with the calculation result representing the magnetic field intensity and the direction of the medium-and-large magnetic field.
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公开(公告)号：US20190277924A1
公开(公告)日：2019-09-12
申请号：US16462417
申请日：2017-06-28
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.
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3.发明公开公开(公告)号：US20230323032A1
公开(公告)日：2023-10-12
申请号：US18333512
申请日：2023-06-12
申请人： TSINGHUA UNIVERSITY
发明人： Qi LI , Mingcong YANG , Jinliang HE , Sang CHENG
CPC分类号： C08G73/1071 , C08J5/18 , C08G73/1032 , C08K3/22 , H01G4/33 , H01G4/14 , C08J2379/08 , C08K2003/2227
摘要： Provided are a high-temperature energy storage hybrid polyetherimide dielectric film, a preparation method therefor, and use thereof, belonging to the technical field of polymer capacitor films. The method includes: synthesizing a solution of polyether amide acid having a hydroxyl end group or side chain through a reaction of a polyetherimide monomer having a hydroxyl functional group; adding, into the solution of polyether amide acid, water and metal alkoxide as an inorganic component precursor to form uniform sol; and obtaining the high-temperature energy storage hybrid polyetherimide dielectric thin film through coating and thermal imidization. The dielectric thin film is prepared by one-step synthesis and an inorganic phase is introduced during hybridization, dispersion at a molecular level is realized, avoiding an agglomeration of the inorganic phase and improving interface compatibility of the organic phase, as well as enhancing energy storage performance of the dielectric film.
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4.发明公开公开(公告)号：US20230174698A1
公开(公告)日：2023-06-08
申请号：US17997402
申请日：2020-11-09
申请人： CHINA PETROLEUM & CHEMICAL CORPORATION , BEIJING RESEARCH INSTITUTE OF CHEMICAL INDUSTRY, CHINA PERTROLEUM & CHEMICAL CORPORATION , TSINGHUA UNIVERSITY
发明人： Wenbo SONG , Jinliang HE , Hao YUAN , Qing SHAO , Qi LI , Hongwei SHI , Qi ZHANG , Juan LI , Yutao WANG , Jun HU , Fasheng ZOU , Yao ZHOU
IPC分类号： C08F255/04 , C08F212/08 , C08F222/06 , C08K5/14 , H01B3/44
CPC分类号： C08F255/04 , C08F212/08 , C08F222/06 , C08K5/14 , H01B3/441
摘要： The invention belongs to the field of polymers, and relates to an anhydride group-containing polypropylene graft for an insulating material and preparation method thereof. The anhydride group-containing polypropylene graft comprises structural units derived from a polypropylene copolymer, structural units derived from an anhydride monomer and structural units derived from an alkenyl-containing polymerizable monomer; the content of the structural units derived from the anhydride monomer and the alkenyl-containing polymerizable monomer and in a grafted state in the anhydride group-containing polypropylene graft is 0.1 to 5 wt %, based on the weight of the anhydride group-containing polypropylene graft; and, the molar ratio of the structural units derived from the anhydride monomer to the structural units derived from the alkenyl-containing polymerizable monomer in the anhydride group-containing polypropylene graft is 1:1-20; the polypropylene copolymer has at least one of the following characteristics: the comonomer content is 0.5 to 40 mol %; the content of xylene solubles is 2 to 80 wt %; the comonomer content in the xylene solubles is 10 to 70 wt %; the intrinsic viscosity ratio of the xylene solubles to the polypropylene copolymer is 0.3 to 5. The anhydride group-containing polypropylene graft of the invention can give consideration to both mechanical property and electrical property at a higher working temperature.
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5.发明公开公开(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
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.
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公开(公告)号：US20240142509A1
公开(公告)日：2024-05-02
申请号：US18408026
申请日：2024-01-09
申请人： TSINGHUA UNIVERSITY
发明人： Bo ZHANG , Zherui CUI , Zhecheng ZHANG , Jun HU , Jinliang HE
CPC分类号： G01R31/085 , G01R31/58 , H02J3/0012 , H02J3/00125 , H02J13/00002 , H02J13/00032 , H02J13/0001
摘要： An online monitoring method for dynamic changes in positions of transmission line conductors based on electromagnetic signals of ground wires and an apparatus are provided. The method includes: monitoring electromagnetic signals of ground wires; in response to changing in the electromagnetic signals, sending waveforms of the electromagnetic signals of the ground wires before and after changing to a data processing end; deducing change situations of mutual inductances between the ground wires and conductors based on values of conductor currents and the change situations of the electromagnetic signals of the ground wires, and further deducing position change situations of the conductors based on the change situations of the mutual inductances between the ground wires and the conductors; and obtaining dynamic changes in positions and movement statuses of the transmission line conductor based on the position change situations of the conductors.
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公开(公告)号：US20230174699A1
公开(公告)日：2023-06-08
申请号：US17997403
申请日：2020-11-09
申请人： CHINA PETROLEUM & CHEMICAL CORPORATION , BEIJING RESEARCH INSTITUTE OF CHEMICAL INDUSTRY, CHINA PETROLEUM & CHEMICAL CORPORATION , TSINGHUA UNIVERSITY
发明人： Hao YUAN , Wenbo SONG , Jinliang HE , Qing SHAO , Qi LI , Qi ZHANG , Hongwei SHI , Juan LI , Yutao WANG , Jun HU , Xiaomeng ZHANG , Yao ZHOU
IPC分类号： C08F255/04 , C08F212/08 , C08K5/14 , H01B3/44
CPC分类号： C08F255/04 , C08F212/08 , C08K5/14 , H01B3/441
摘要： The invention belongs to the field of polymers, and relates to a grafting-modified polypropylene material for an insulating material and preparation method thereof. The grafting-modified polypropylene material comprises structural units derived from a polypropylene copolymer and structural units derived from an alkenyl-containing polymerizable monomer; the content of the structural units derived from the alkenyl-containing polymerizable monomer and in a grafted state in the grafting-modified polypropylene material is 0.1 to 14 wt %; the polypropylene copolymer has at least one of the following characteristics: the comonomer content is 0.5 to 40 mol %; the content of xylene solubles is 2 to 80 wt %; the comonomer content in the xylene solubles is 10 to 70 wt %; the intrinsic viscosity ratio of the xylene solubles to the polypropylene copolymer is 0.3 to 5. The grafting-modified polypropylene material of the invention can give consideration to both mechanical property and electrical property at a higher working temperature.
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8.发明申请公开(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
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.
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