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公开(公告)号：US20180319665A1
公开(公告)日：2018-11-08
申请号：US15957011
申请日：2018-04-19
Applicant: Xi'an University of Technology
Inventor： Changqing Fang , Xing Zhou , Rong Yang , Shaofei Pan , Wanqing Lei , Yan Li
IPC: C01B32/16
CPC classification number: C01B32/16 , C01B2202/06 , C01B2202/36 , C01P2002/82 , C01P2004/03 , C01P2004/04 , C01P2004/133 , Y02P20/584
Abstract: The present invention relates to carbon nanotubes and a preparation method thereof by using PET. The carbon nanotubes of the present invention are prepared by processes of alcoholysis of PET materials, processes of washing, crushing and calcining unreacted intermediates and so on. By the preparation method of the present invention, multi-walled carbon nanotubes prepared by using waste PET have a good conductivity, and are a structure of top-down array with low aspect ratio. The method of the present invention is not only easy to implement, but also does not need a catalyst, and turns the waste PET into treasure, which solves the problem of environmental pollution caused by the increasingly serious waste PET. FIG. 9.
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12.发明申请公开(公告)号：US20240410512A1
公开(公告)日：2024-12-12
申请号：US18399749
申请日：2023-12-29
Applicant: Xi'an University of Technology
Inventor： Tao BAI , Dong LIU , Linhui MOU , Qianglong FENG , Xinyue LIU , Xin LI , Erjuan YANG
IPC: F16L55/48 , F16L101/30
Abstract: A positioning and information transmission method of a hydrological monitoring device in a single-free area combines a wireless communication technology with a hydrodynamics-based hydrological monitoring device, which can solve the problem of hydrological monitoring information transmission in a signal-free area such as a hydraulic tunnel. First, magnetic beacons each composed of an LoRa (long distance radio) terminal device and an ultra-wideband technology are arranged at the top of the interior of a signal-free tunnel at an interval of 500 m. When a hydrological monitoring device in use enters a coverage area of the magnetic beacon, the LoRa terminal device in the magnetic beacon will automatically start an internal communication protocol and receive data acquired by the device by monitoring, the data is transmitted based on a mutual LoRa communication protocol between the magnetic beacons, and finally, the data is transmitted to a ground central control system for storage.
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公开(公告)号：US20250041944A1
公开(公告)日：2025-02-06
申请号：US18788735
申请日：2024-07-30
Applicant: XI'AN UNIVERSITY OF TECHNOLOGY
Inventor： Shujuan LI , Wang QIN , Dajing GAO , Zhiyuan ZHAO , Yong LIU , Yixiao YAN , Mingkun WANG
Abstract: A conformal printing device for curved-surface circuits is provided. The device includes a device body that includes a stand and a support plate movable relative to the stand. The device further includes a print-head module mounted on the support plate and a motion module mounted on the device body. The print-head module includes a piezoelectric nozzle and an airflow assisting structure for applying an assisted airflow to guide charged jet ejected from the nozzle to be precisely printed onto a curved-surface base material below the nozzle. The motion module enables a tangent of a surface, on which a printing position of the curved-surface base material to be printed is located, to be always perpendicular to a jet ejected by the nozzle, ensures that the print-head module moves following the curved-surface shape, and implements conformal printing circuits on any complex curved surfaces.
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公开(公告)号：US11692935B2
公开(公告)日：2023-07-04
申请号：US17276825
申请日：2021-01-13
Applicant: XI'AN UNIVERSITY OF TECHNOLOGY
Inventor： Wei Shi , Lei Hou , Cheng Ma , Chengang Dong , Lei Yang , Jiaguang Han , Yanfeng Li , Chunmei Ouyang , Jianqiang Gu , Liguo Zhu , Zhaohui Zhai , Lianghui Du , Yi Zou
IPC: G01N21/3581 , G01N21/3577 , G01N21/39 , G01N33/487 , G01N21/17
CPC classification number: G01N21/3581 , G01N21/3577 , G01N21/39 , G01N33/48721 , G01N2021/177 , G01N2021/396
Abstract: Disclosed is a transient-state THz spectrometer applied to cells and biological macromolecules, including a femtosecond laser amplifier. A femtosecond laser output by the femtosecond laser amplifier is divided into two beams of pump light and probe light after passing through a beam splitter of which a transmission-reflection ratio is 7:3, the pump light is focused to irradiate a gap between electrodes of a nonlinear photoconductive antenna and emit a terahertz wave after successively passing through a half wave plate, a silver-plated reflector and a first lens, the terahertz wave forms a terahertz wave collineation after successively passing through a second lens, a slab waveguide, a third lens and an ITO film, the terahertz wave collineation and the probe light form a probe light collineation of wavefront tilt which is perpendicularly incident on a ZnTe crystal and detected and recorded by using a CCD camera.
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公开(公告)号：US20230058188A1
公开(公告)日：2023-02-23
申请号：US17276825
申请日：2021-01-13
Applicant: XI'AN UNIVERSITY OF TECHNOLOGY
Inventor： Wei SHI , Lei HOU , Cheng MA , Chengang DONG , Lei YANG , Jiaguang HAN , Yanfeng LI , Chunmei OUYANG , Jianqiang GU , Liguo ZHU , Zhaohui ZHAI , Lianghui DU , Yi ZOU
IPC: G01N21/3581 , G01N21/3577 , G01N21/39 , G01N33/487
Abstract: Disclosed is a transient-state THz spectrometer applied to cells and biological macromolecules, including a femtosecond laser amplifier. A femtosecond laser output by the femtosecond laser amplifier is divided into two beams of pump light and probe light after passing through a beam splitter of which a transmission-reflection ratio is 7:3, the pump light is focused to irradiate a gap between electrodes of a nonlinear photoconductive antenna and emit a terahertz wave after successively passing through a half wave plate, a silver-plated reflector and a first lens, the terahertz wave forms a terahertz wave collineation after successively passing through a second lens, a slab waveguide, a third lens and an ITO film, the terahertz wave collineation and the probe light form a probe light collineation of wavefront tilt which is perpendicularly incident on a ZnTe crystal and detected and recorded by using a CCD camera.
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Patent Agency Ranking
公开(公告)号：US11075783B2
公开(公告)日：2021-07-27
申请号：US16636338
申请日：2018-05-31
Applicant: Xi'an University of Technology
Inventor： Haipeng Ren , Chao Bai
Abstract: A communication method for phase separation differential chaos shift keying (DCSK) based on a second order hybrid system (SOHS) is provided. The method includes the following steps. At Step 1: communication system parameters are set. At Step 2: binary information to be transmitted are prepared. At Step 3: the chaotic signal u(t) is generated. At Step 4: the chaotic signal is prepared to be transmitted. At Step 5: a received signal is demodulated. At Step 6: a chaotic matched filtering operation is performed on the demodulated reference signal and the demodulated information bearing signal. At Step 7: optimal signal to noise ratio (SNR) points are extracted in a sampling way. At Step 8: polarity of each symbol is determined to obtain a recovered signal.
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公开(公告)号：US20200335978A1
公开(公告)日：2020-10-22
申请号：US16842816
申请日：2020-04-08
Applicant: Xi'an University of Technology
Inventor： Haipeng REN , Jie LI
Abstract: The present disclosure discloses an adaptive control method for an output feedback of a VSG. The method includes: analog signals are converted to digital values; VSG excitation output by reactive power-voltage regulation control is calculated, and an output voltage amplitude and a grid voltage amplitude of a three-phase full-bridge inverter are calculated; an active power, a reactive power and an excitation electromotive force are calculated; an initial value of speed feedback coefficient is calculated; angular speed and phase are output, and a rotation speed difference and an angular acceleration are calculated; the speed feedback coefficient is set according to the rotation speed difference; the CLARK transform is performed by means of the excitation electromotive force to obtain a voltage in an α-β stationary coordinate system; and SVPWM is performed to obtain a six-way switch control pulse driving the three-phase full-bridge inverter and implement a three-phase AC current feedback grid.
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公开(公告)号：US10739495B2
公开(公告)日：2020-08-11
申请号：US16480870
申请日：2018-10-19
Applicant: Xi'an University of Technology , Lanzhou University
Inventor： Dengxin Hua , Lei Zhang , Fei Gao , Jun Wang , Huige Di , Zhongwei Huang , Tingyao He , Qing Yan , Wenhui Xin , Xianjie Cao , Yufeng Wang , Li Wang , Tian Zhou , Yan Li
Abstract: A cloud water resource detecting system and method, the system includes computing device, and Raman lidar, microwave radiometer, millimeter wave cloud radar, wind profile radar and Doppler wind lidar in communication connection with the computing device. The Raman lidar and the microwave radiometer are configured to obtain temperature and humidity data of a cloud system. The millimeter wave cloud radar and the microwave radiometer are configured to obtain cloud water content profiles. The wind profile radar is configured to obtain a horizontal wind speed of the cloud system. The Doppler wind lidar is configured to obtain the vertical motion speed of a cloud bottom. The computing device is configured to calculate the total amount of cloud water according to the temperature and humidity data of the cloud system, the cloud water content profiles, the horizontal wind speed of the cloud system and the vertical motion speed of the cloud bottom.
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公开(公告)号：US20190194771A1
公开(公告)日：2019-06-27
申请号：US16327884
申请日：2017-08-31
Applicant: Xi'an University of Technology
Inventor： Yang XU , Guojun YAN , Baojian LIU
CPC classification number: C21D9/40 , B22D11/14 , C21D1/20 , C21D1/32 , C22C33/08 , C22C37/04 , C22C37/06 , C22C37/08 , C22C37/10 , F16C33/66 , F16C33/6696
Abstract: A self-lubricating rolling bearing is provided. The chemical compositions in the inner rings and the outer rings of bearing are 3.4-3.7% C, 2.7-2.9% Si, 0.3-0.5% Mn, 0.3-0.5% Cr, ≤0.05% S, ≤0.05% P, 0.03-0.045% Residual Mg, and the remainder Fe. The total percent of the chemical compositions is 100%. The material for the inner and outer rings of the rolling bearing introduced in the invention is austempered ductile iron (ADI). In the microstructure of ADI, the diameter of the graphite nodules is less than 0.02 mm, the number of graphite spheres per square millimeter is more than 400, and the microstructure of the metal matrix in the ADI can be showed clearly only when it is observed on the microscope with a magnification more than 500. Eventually, the self-lubricating rolling bearings are made from the ADI.
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20.发明授权公开(公告)号：US10236811B2
公开(公告)日：2019-03-19
申请号：US15756810
申请日：2016-02-04
Applicant: XI'AN UNIVERSITY OF TECHNOLOGY
Inventor： Hai-Peng Ren
Abstract: A method of realizing single direction chaotic rotation speed of permanent magnet synchronous motor is provided powered by a three-phase full-bridge inverter.
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