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公开(公告)号：US11703377B2
公开(公告)日：2023-07-18
申请号：US17667760
申请日：2022-02-09
Applicant: North University of China
Inventor： Yongqiu Zheng , Chenyang Xue , Jinge Guan , Pinggang Jia , Xinyu Zhao , Chen Chen , Jiamin Chen , Liyun Wu , Yuan Han
IPC: G01H17/00
CPC classification number: G01H17/00
Abstract: The present disclosure relates to a thermal-acoustic-vibration three-parameter integrated in-situ sensor and system with a high-temperature-resistant and high-pressure-resistant structure. The provided thermal-acoustic-vibration three-parameter integrated in-situ sensor with a high-temperature-resistant and high-pressure-resistant structure comprises a heat detection device, a sound detection device and a vibration detection device; and the sound detection device and the vibration detection device are distributed on two sides of the heat detection device. When heat, sound and vibration need to be detected, only spectra of light signals emitted by the heat detection device, the sound detection device and the vibration detection device need to be obtained, and heat information, sound information and vibration information to be detected are obtained through the corresponding relation between the spectra of the optical signals emitted by the heat detection device, the sound detection device and the vibration detection device and heat information, sound information and vibration information to be detected.
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公开(公告)号：US11622483B2
公开(公告)日：2023-04-04
申请号：US17540584
申请日：2021-12-02
Inventor： Yaqing Liu , Hongji Duan , Guizhe Zhao
IPC: H05K9/00 , C08K3/04 , C08K3/38 , B29C39/00 , C08K9/00 , C08L75/04 , C08L83/06 , B29K75/00 , B29K83/00 , B82Y30/00 , B82Y40/00
Abstract: A gradient electrically conductive-uniform thermally conductive dual network structure-based electromagnetic shielding polymer composite with low reflection and high absorption and a preparation method thereof. The electromagnetic shielding polymer composite includes a gradient conductive carbon nanotube network with a vertically oriented cell structure and a uniformly thermally conductive hexagonal boron nitride/carbon nanotube network constructed by the hexagonal boron nitride dispersed uniformly in the carbon nanotube network and the gradient carbon nanotube network. The gradient electrically conductive carbon nanotube network and the uniformly thermally conductive hexagonal boron nitride/carbon nanotube network form a composite synergistic dual function network structure so as to make the electromagnetic shielding polymer composite have a low reflection and high absorption and excellent thermal conductivity.
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公开(公告)号：US20220403133A1
公开(公告)日：2022-12-22
申请号：US17895979
申请日：2022-09-09
Inventor： Yaqing LIU , Xiaoyuan DUAN , Guizhe ZHAO , Shuaishuai CHENG
Abstract: A vulcanizing agent-modified graphene prepared through an in-situ chemical deposition process and a controllable crosslinked natural rubber composite containing the same. In the preparation of the vulcanizing agent-modified graphene, graphene oxide is coated on a spherical thermal-conductive functional particle through the chemical bonding to obtain a 3D graphene particle; and a vulcanizing agent is adsorbed on the 3D graphene particle through π-π conjugation by an in-situ chemical deposition process to obtain a vulcanizing agent-modified graphene particle. Further, the vulcanizing agent-modified graphene particle is mixed with natural rubber latex, and undergoes synergistic coagulation in water to form a graphene masterbatch, which is further processed into the controllable crosslinked natural rubber composite by adding a certain amount of natural rubber block, rubber additive and reinforcing filler.
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公开(公告)号：US20220095498A1
公开(公告)日：2022-03-24
申请号：US17540584
申请日：2021-12-02
Inventor： Yaqing LIU , Hongji DUAN , Guizhe ZHAO
Abstract: A gradient electrically conductive-uniform thermally conductive dual network structure-based electromagnetic shielding polymer composite with low reflection and high absorption and a preparation method thereof. The electromagnetic shielding polymer composite includes a gradient conductive carbon nanotube network with a vertically oriented cell structure and a uniformly thermally conductive hexagonal boron nitride/carbon nanotube network constructed by the hexagonal boron nitride dispersed uniformly in the carbon nanotube network and the gradient carbon nanotube network. The gradient electrically conductive carbon nanotube network and the uniformly thermally conductive hexagonal boron nitride/carbon nanotube network form a composite synergistic dual function network structure so as to make the electromagnetic shielding polymer composite have a low reflection and high absorption and excellent thermal conductivity.
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35.发明申请公开(公告)号：US20210402371A1
公开(公告)日：2021-12-30
申请号：US17243133
申请日：2021-04-28
Applicant: North University of China
Inventor： Yanbin Li , Lirong Li , Yizhi Hu , Hongfang He , Fengdi Tang
IPC: B01J20/26 , C08F257/02 , B01J20/28 , B01J20/32
Abstract: The present disclosure provides a preparation method of AM-type polystyrene microsphere ofloxacin imprinted polymer as well as an application thereof. A monomer acrylamide and an initiator ammonium persulfate are subjected to graft polymerization on the surface of modified polystyrene primary amine resin, to get grafted particles; then an adsorption test of a levofloxacin solution by the grafted particles PAM/PSA is conducted, and then a levofloxacin surface molecularly imprinted material MIP-PAM/PSA is prepared by using ethylene glycol diglycidyl ether as the crosslinking agent. The present disclosure can realize the separation and purification of racemic ofloxacin effectively, thus providing a new method and material for separating and enriching s-type ofloxacin in the industry. Because the antibacterial efficacy of S-ofloxacin on Gram-negative bacteria and positive bacteria is 8-128 times that of its enantiomer R-ofloxacin, so the present technology can improve the efficacy of a drug greatly.
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Patent Agency Ranking
公开(公告)号：US20210333531A1
公开(公告)日：2021-10-28
申请号：US17236353
申请日：2021-04-21
Applicant: North University of China
Inventor： Jun Liu , Zongmin Ma , Jun Xu , Jun Tang , Yunbo Shi , Huanfei Wen , Cheng Dong , Huiyun Wang
Abstract: A system of automatic adjustment of a laser reflection path, comprising a central processing device, a driving device, a four-quadrant photodetector, a driving arm, a micro cantilever, a sample, a sample placing table, a light reflector, a laser, a CCD equipped with an optical microscope, a vibration sensor, a signal processing circuit, a display device, a storage device, and a control device; a system of automatic adjustment of the laser reflection path is controlled by the control device, wherein a laser beam is emitted by the laser, an image collected by the CCD equipped with the optical microscope is processed by the central processing device to identify the micro cantilever, and then a driving arm is driven by a driving device to drive the micro cantilever to move to the center of a laser spot, during which vibration signals of the driving arm are also under monitoring.
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公开(公告)号：US20210018390A1
公开(公告)日：2021-01-21
申请号：US16751306
申请日：2020-01-24
Applicant: NORTH UNIVERSITY OF CHINA
Inventor： JIJUN XIONG , CHEN LI , YINGPING HONG , BOSHAN SUN
Abstract: A pressure-sensitive chip, a pressure sensor, and a pressure monitoring system. In an embodiment, a pressure-sensitive chip and a signal processing module are packaged to form a pressure sensor. The pressure sensor and a display instrument are connected to form a pressure monitoring system. A pressure-sensitive chip is a ceramic body made of eight green ceramic sheets by stacking and sintering, and includes two capacitors. In another embodiment, a pressure signal of a measurement area is obtained by a method including the following steps: sensing a pressure in a measurement area by the pressure-sensitive chip; generating a capacitance signal by the pressure-sensitive chip; converting the capacitance signal to a voltage signal by the signal processing module; and converting the voltage signal into the pressure signal by the display instrument.
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公开(公告)号：US20190031574A1
公开(公告)日：2019-01-31
申请号：US15910887
申请日：2018-03-02
Applicant: NORTH UNIVERSITY OF CHINA
Inventor： Yaqing Liu , Yang Xiang , Guizhe Zhao
IPC: C05G3/00 , C05B7/00 , C05G3/04 , C09K17/28 , C09K17/22 , C05B19/00 , C08F251/02 , C08F292/00
Abstract: This disclosure relates to water-absorbing and slow/controlled release fertilizer, in particular to a water-absorbing and water-retaining multi-nutrient biodegradable polymeric slow/controlled release fertilizer having a semi-interpenetrating network structure, and preparation methods thereof. The method can comprises the steps of: reacting formaldehyde with urea to obtain a hydroxymethyl urea solution; adding acrylic acid and acrylamide monomers into another reactor, and adding a KOH solution to adjust the neutralization degree of acrylic acid, then adding one of inorganic clay, pretreated crop straw or cellulose, then adding initiator, monopotassium phosphate and the prepared hydroxymethyl urea solution sequentially; allowing to react at temperature after being mixed uniformly to obtain a viscous product; and granulating the viscous product and oven drying the same to obtain the fertilizer. The fertilizer prepared according to the present invention has strong water-absorbing and water-retaining capacity, and an excellent slow release performance for nitrogen, phosphorus and potassium contained as nutrients.
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39.发明申请公开(公告)号：US20180056353A1
公开(公告)日：2018-03-01
申请号：US15468743
申请日：2017-03-24
Applicant: North University of China
Inventor： Jianmin Yu , Zhimin Zhang , Xubin Li , Qiang Wang , Mo Meng
Abstract: The present invention discloses a rotary extrusion producing mold for producing an inner ring rib with a large aspect ratio formed of a hollow billet, which consists of a concave die, a left half convex die, a right half convex die, a mandrel, a lower core support and an elastic supporting mechanism, the left and right half convex dies are fixed onto an upper template connected with a slider and a horizontal hydraulic cylinder, a left drive hydraulic cylinder and a right drive hydraulic cylinder are mounted at both ends of the upper template, respectively, the lower core support passes through a middle of the concave die, the elastic supporting mechanism is mounted at a bottom of the lower core support, a drive gear is mounted on a side face of the concave die, and the mandrel is disposed between the left and right half convex dies.
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公开(公告)号：US09630260B1
公开(公告)日：2017-04-25
申请号：US14966353
申请日：2015-12-11
Applicant: NORTH UNIVERSITY OF CHINA
Inventor： Xingquan Shen , Daguo Yu , Yanlan Li , Xiaobin Huang , Chuangmin Wang , Xiaoming Bo , Baoluo Quan , Zhen Dong
CPC classification number: B23B41/02 , B23B29/027 , B23B2260/092 , B23B2260/128 , B23B2270/34 , B23B2270/48 , B23Q15/14 , G01S7/497 , G01S17/06 , G01S17/42 , G01S17/88
Abstract: The present disclosure relates to the technical field of deep hole machining, particularly to a rear-mounted deep hole machining on-line detection and deviating correction device, which provide solution to the difficulty in observing the machining site and correcting the cutter deviation in deep hole machining. The device comprises a cutter bar provided with a plurality of iron blocks mounted uniformly in a circumferential direction, wherein each of the iron blocks is provided with a heating device in the interior thereof and a wear-resistant block mounted on the top thereof, wherein mounted on an end face of the other end of the cutter bar is a pyramid prism, wherein a laser transmitter and a photosensitive sensor are mounted in a height corresponding to the height range of the pyramid prism, wherein the incident beam emitted by the laser transmitter is oriented by a laser orientating block. The advantages of the disclosure lie in that the information of the position the deep hole cutter during deep hole machining process and whether the deep hole is skewed or not can be obtained in time, thereby facilitating a solution to the difficulty in detecting the workpiece deep hole straightness and on-line deviating correction, improving the position accuracy such as straightness of the deep hole and reducing the rejection rate of the workpiece.
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