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公开(公告)号：US20220089033A1
公开(公告)日：2022-03-24
申请号：US17422134
申请日：2019-06-27
Applicant: SOUTHWEST JIAOTONG UNIVERSITY
Inventor： Qunzhan LI , Kai GUO , Shaofeng XIE , Zihan LI , Xiaohong HUANG , Yuhua GUO , Shuqian LI , Bo WU
Abstract: The present invention relates to the technical field of train power supply and operation control, and provides a three-rail power supply control system for an electrical railway train. Power supply rails in the system are divided into a first power supply rail, a second power supply rail, and a third power supply rail, wherein the first power supply rail, the second power supply rail, and a running rail constitute a three-phase AC power supply loop, and the third power supply rail and the running rail constitute a DC power supply loop. An AC-DC-AC variable voltage variable frequency device supplies power to a train traction motor by means of the three-phase AC power supply loop and current collectors. Frequency modulation and voltage regulation power supply is conducted by means of the AC-DC-AC variable voltage variable frequency device on the ground to achieve train driving and operation control. The DC power supply loop is powered by means of a rectifying device on the ground, and power is supplied to auxiliary electric equipment of the train by means of the current collectors. By changing the power supply mode of the system and optimizing the system structure, the weight and axle load of train-mounted equipment are effectively reduced, lightweight of the train is achieved, and the bearing efficiency of the train is improved, and moreover, automatic control and unmanned driving for train operation are achieved in the most economical way.
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公开(公告)号：US20210396637A1
公开(公告)日：2021-12-23
申请号：US17463547
申请日：2021-09-01
Applicant: Southwest Jiaotong University
Inventor： Tao Jin , Xiewen Hu , Liming Zhao , Guanglin Huang , Ruijie Zheng , Xurong He , Song Xue , Mei Han , Chuanjie Xi , Xiangbin Yang
Abstract: A portable soil body in-situ shear test device includes four parts: an active force system forming arranged externally, a passive shear system and an electromagnetic loading system forming arranged internally, and a ring knife system arranged at a bottom. Compared with the conventional in-situ soil shear strength test device and test method, the present invention is convenient to install and carry as well as simple to operate, and has strong applicability. The present invention is suitable not only for layered soils with large cross-plate shear test errors, but also for soils with different consolidation degrees at various sites and various terrains. A test method adopting the device can simulate the shear strength of the soil mass under different overburden loads without disturbing the mechanical properties of the in-situ soil mass, which has high promotion value in the test of in-situ soil shear strength.
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公开(公告)号：US20190106150A1
公开(公告)日：2019-04-11
申请号：US16086507
申请日：2017-04-11
Applicant: Qunzhan Li , Southwest Jiaotong University
Inventor： Qunzhan Li
Abstract: A trackless train comprising a locomotive and carriages of N trailers is disclosed. The locomotive comprising an axle for a pair of steering drive wheels, controlled by a driver through a bogie, which comprises an angle sensor connected to an input end of a steering angle meter. The kth carriage comprises a steering wheel having a steering mechanism, controlling the steering angle of the steering wheel. The controller comprising an input end connected to an output end of a clock, an odometer and the steering angle meter, and an output end connected to an input end of the steering mechanism of the trailers via an optical network. The controller records time (from clock), mileage (from odometer) and steering angle of the steering drive wheels (steering angle meter), and describes/controls a travelling track of the train, such that the steering wheels of the carriages and the locomotive maintain the same track.
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公开(公告)号：US12109914B2
公开(公告)日：2024-10-08
申请号：US17422134
申请日：2019-06-27
Applicant: SOUTHWEST JIAOTONG UNIVERSITY
Inventor： Qunzhan Li , Kai Guo , Shaofeng Xie , Zihan Li , Xiaohong Huang , Yuhua Guo , Shuqian Li , Bo Wu
CPC classification number: B60M1/30 , B60L5/36 , B60L5/39 , B60L2200/26
Abstract: The present invention relates to the technical field of train power supply and operation control, and provides a three-rail power supply control system for an electrical railway train. Power supply rails in the system are divided into a first power supply rail, a second power supply rail, and a third power supply rail, wherein the first power supply rail, the second power supply rail, and a running rail constitute a three-phase AC power supply loop, and the third power supply rail and the running rail constitute a DC power supply loop. An AC-DC-AC variable voltage variable frequency device supplies power to a train traction motor by means of the three-phase AC power supply loop and current collectors. Frequency modulation and voltage regulation power supply is conducted by means of the AC-DC-AC variable voltage variable frequency device on the ground to achieve train driving and operation control. The DC power supply loop is powered by means of a rectifying device on the ground, and power is supplied to auxiliary electric equipment of the train by means of the current collectors. By changing the power supply mode of the system and optimizing the system structure, the weight and axle load of train-mounted equipment are effectively reduced, lightweight of the train is achieved, and the bearing efficiency of the train is improved, and moreover, automatic control and unmanned driving for train operation are achieved in the most economical way.
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公开(公告)号：US12101392B2
公开(公告)日：2024-09-24
申请号：US17518650
申请日：2021-11-04
Applicant: Southwest Jiaotong University
Inventor： Lianshan Yan , Lin Jiang , Yan Pan , Anlin Yi , Wei Pan
IPC: H04L9/00 , H04L9/08 , H04L9/30 , H04L27/152
CPC classification number: H04L9/001 , H04L9/0858 , H04L9/3066 , H04L27/1525
Abstract: A coherent detection-based high-speed chaotic secure transmission method includes: at a transmit terminal in a chaotic secure transmission system, optically coupling an optical chaotic carrier and transmission information by using an orthogonal basis to mask the transmission information by using a noise-like feature of the chaotic carrier, so as to obtain a chaotic masked signal; adding a fast phase disturbance and a fast polarization disturbance to the chaotic masked signal and transmitting the chaotic masked signal over an optical fiber transmission link; and at a receive terminal, obtaining the chaotic masked signal through coherent detection, compensating the chaotic masked signal for linear and nonlinear effects through digital signal processing, and using a polarization orthogonal basis- or phase orthogonal basis-based chaotic decryption algorithm to separate the chaotic carrier from the signal so as to complete decryption.
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Patent Agency Ranking
公开(公告)号：US12083602B2
公开(公告)日：2024-09-10
申请号：US18630802
申请日：2024-04-09
Applicant: SOUTHWEST JIAOTONG UNIVERSITY
Inventor： Yi Xu , Chengyang Zhang , Siyi He , Hui Chen
CPC classification number: B22F9/14 , C22C1/02 , C22C14/00 , C22F1/183 , B22F2202/13 , B22F2301/205 , B22F2998/10 , B22F2999/00
Abstract: A preparation method of Yttrium oxide dispersed and strengthened titanium alloy powders. The method includes following steps: mixing alloying elements according to alloy element ratios of: 0.1 wt % to 1.0 wt % Y, 5.5 wt % to 6.8 wt % Al, 3.5 wt % to 4.5 wt % V, Ti as balance, preparing alloy ingots by vacuum smelting process, and performing forging and rolling process; performing mechanical treatment for forged and rolled alloy ingots, to obtain alloy rods that meet size requirement of plasma rotating electrode process; preparing titanium alloy powders based on alloy rods by the plasma rotating electrode process; preparing parameters are: rotating speed of the alloy rods is 25000 r/min to 35000 r/min, a feeding speed of the alloy rods is 1.0 mm/s to 2.0 mm/s, power of the plasma gun is 60 kw to 140 kw, a temperature of the inert gas is 200° C. to 400° C., oxygen content of atomization chamber not greater than 100 ppm.
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27.发明授权公开(公告)号：US11946735B2
公开(公告)日：2024-04-02
申请号：US17980411
申请日：2022-11-03
Applicant: Southwest Jiaotong University
Inventor： Guoqing Gou , Feifei Qiu , Bing Chen , Yuzi Hu , Zhongyin Zhu , Junjun Jin
CPC classification number: G01B17/00 , G01N29/04 , G01N29/44 , G01N2291/0234
Abstract: Disclosed is a method fir measuring a deviation angle of a fatigue microcrack based on nonlinear ultrasound, comprising: preliminarily positioning a fatigue microcrack to obtain a center of the microcrack; selecting a horizontal positive direction, and defining an orientation angle; drawing a positive circumference on a surface of a metal plate, and selecting a fixed interval angle; placing an excitation sensor and a receiving sensor on the drawn positive circumference according to the orientation angle; ultrasonically testing each group of ultrasonic sensing paths, and recording time domain waveform signals formed by each group of ultrasonic sensing paths; converting each group of time domain waveform signals into a corresponding frequency domain graph, extracting an ultrasonic fundamental wave signal amplitude and a second harmonic waveform amplitude, and calculating a relative nonlinear coefficient; drawing an orientation angle-relative nonlinear coefficient polar coordinate graph; and determining a deviation angle of the microcrack.
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28.发明公开公开(公告)号：US20240089152A1
公开(公告)日：2024-03-14
申请号：US18242023
申请日：2023-09-05
Applicant: Southwest Jiaotong University
Inventor： Yanyan WANG , Qidi LI , Li LI , Xianfu LEI , Xiaohu TANG
IPC: H04L25/02
CPC classification number: H04L25/0256 , H04L25/0204 , H04L25/0242
Abstract: An angular domain channel estimation method based on matrix reconstruction for a symmetrical nonuniform array is a combined two-stage channel estimation and channel equalization scheme provided based on an SNLA model. In a first stage, a matrix reconstruction method is used to estimate a path AOA, and compared with traditional channel estimation based on ULA, the matrix reconstruction method achieves a higher resolution ratio. In a second stage, an LS method is used to obtain a path gain. According to the angular domain channel estimation method, a mean square error of channel estimation, a bit error of data transmission and complexity of a traditional scheme are significantly reduced. A simulation result indicates that compared with the traditional method, the angular domain channel estimation method can achieve a lower MSE and BER.
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公开(公告)号：US11854737B2
公开(公告)日：2023-12-26
申请号：US16708451
申请日：2019-12-10
Applicant: Southwest Jiaotong University
Inventor： Guangtong Ma , Zhen Luo , Xingchao Nie , Ruichen Wang
CPC classification number: H01F6/04 , F17C3/085 , H01F6/006 , F17C2203/03 , F17C2203/0643 , F17C2221/012 , F17C2221/014 , F17C2221/016 , F17C2221/017 , F17C2223/0161
Abstract: A detachable cryostat includes many novel structures. Two radiation shields are installed in the detachable cryostat. One of the radiation shields is cooled by the second-stage cold chamber utilized to contain a cryogen, and the other one is cooled by the first-stage cold head of the cryocooler. These structures are both used for reducing heat loads from an outside. The resilient supporting device, the resilient circular sleeve, the bellows and the conductive blocks are utilized to achieve excellent thermal contact and complete thermal isolation between the cryocooler and the cryogen. A detachable binary current lead device can be introduced in the detachable cryostat, wherein, the detachable binary current lead includes a superconducting current lead and a copper current lead. When the installation adjustment mechanism is tightly pressed and loosened, it can enable the superconducting current lead to contact and separate from the copper current lead.
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30.发明授权公开(公告)号：US11840517B2
公开(公告)日：2023-12-12
申请号：US17581920
申请日：2022-01-22
Applicant: Southwest Jiaotong University
Inventor： Xianli Zhou , Feng Gao , Xiaohuan Li , Yuzhu Li , Shuai Huang , Lin Chen , Yinyong Zhang
IPC: C07D221/22 , C07D401/12 , C07D403/12 , C07D405/12 , C07D409/12 , A61P29/00 , A61K31/439 , A61K31/4709 , C07D223/32
CPC classification number: C07D223/32
Abstract: Provided herein are a lappaconitine derivative of formula (I), and a preparation and application thereof.
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