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129 条记录 (耗时 0.025 秒)

    Angular domain channel estimation method based on matrix reconstruction for symmetrical nonuniform array
    101.
    发明授权
    Angular domain channel estimation method based on matrix reconstruction for symmetrical nonuniform array 有权

    公开(公告)号：US11909564B1

    公开(公告)日：2024-02-20

    申请号：US18242023

    申请日：2023-09-05

    申请人： Southwest Jiaotong University

    发明人： Yanyan Wang ,  Qidi Li ,  Li Li ,  Xianfu Lei ,  Xiaohu Tang

    IPC分类号： H04L25/02

    CPC分类号： H04L25/0256 ,  H04L25/0204 ,  H04L25/0242

    摘要： 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.

    Three-phase power supply and collection device for maglev train
    102.
    发明授权
    Three-phase power supply and collection device for maglev train 有权

    公开(公告)号：US11897345B2

    公开(公告)日：2024-02-13

    申请号：US17255777

    申请日：2019-06-21

    申请人： SOUTHWEST JIAOTONG UNIVERSITY

    发明人： Qunzhan Li ,  Jiqin Wu

    IPC分类号： B60L5/39 ,  B60L5/36 ,  B60L13/10 ,  B60M1/30 ,  B60M1/34

    CPC分类号： B60L5/39 ,  B60L5/36 ,  B60L13/10 ,  B60M1/30 ,  B60M1/34 ,  B60L2200/26

    摘要： The present invention provides a three-phase power supply and collection device for a maglev train. A cross beam is arranged at the middle part of the bogie of the maglev train, and the lower surface of the cross beam is provided with three sets of longitudinal bearing seats, and three insulating bushes, three collector shoes and three power supply rails corresponding to the longitudinal bearing seats; the two ends of the horizontal part of each insulating bush is a rotating shaft structure, and the vertical part of the insulating bush is a hollow tubular structure; the upper part of each collector shoe is the shoe handle, the lower part is the shoe body, and the bottom of the shoe body is in a concave semicircular shape; the top surface of each power supply rail is in a convex semicircular shape.

    VEHICLE RUNNING SYSTEM AND METHOD BASED ON RAIL TRANSPORT
    103.
    发明公开
    VEHICLE RUNNING SYSTEM AND METHOD BASED ON RAIL TRANSPORT 审中-公开

    公开(公告)号：US20240043054A1

    公开(公告)日：2024-02-08

    申请号：US18483469

    申请日：2023-10-09

    申请人： Southwest Jiaotong University

    发明人： Zigang DENG ,  Kaiwen LI ,  Jun ZHENG ,  Xin LIU ,  Le LIANG ,  Yihao CHEN

    IPC分类号： B61L27/04 ,  B60L13/04 ,  B61L27/50 ,  B61L27/16

    CPC分类号： B61L27/04 ,  B60L13/04 ,  B61L27/50 ,  B61L27/16 ,  B60L2200/26

    摘要： A vehicle running system based on rail transport, including a track, a framework, two levitation devices and a running device. The track is provided with a slot, in which the framework is provided. The levitation devices are provided between the track and the framework, and a top surface of the levitation device is fixedly connected to a bottom surface of the framework through a suspension structure. The running device includes two conductor plates and two running structures. The conductor plates are fixedly arranged on the inner wall of the slot, and are corresponding to the running structures. The reluctance force of magnetic wheels is converted into a driving force to drive maglev vehicles, and the levitation force is converted into a guiding force to realize the self-stabilization of vehicle guidance. A vehicle running method based on this system is also provided.

    PRESSING AND STRETCHING STRUCTURE AND CLAMPING STRUCTURE OF CONTAINER SPREADER
    105.
    发明公开
    PRESSING AND STRETCHING STRUCTURE AND CLAMPING STRUCTURE OF CONTAINER SPREADER 审中-公开

    公开(公告)号：US20230348234A1

    公开(公告)日：2023-11-02

    申请号：US17886484

    申请日：2022-08-12

    申请人： Southwest Jiaotong University

    发明人： Zeqiang ZHANG ,  Yanqing ZENG ,  Hongbin ZHENG ,  Silu LIU ,  Tengfei WU ,  Wenming CHENG

    IPC分类号： B66C1/66 ,  B66C1/10

    CPC分类号： B66C1/663 ,  B66C1/101

    摘要： The present invention discloses a pressing and stretching structure and a clamping structure of a container spreader, and belongs to the technical field of crane accessories. The pressing and stretching structure comprises a telescopic rod, a rotating mechanism and a guiding cylinder which is arranged vertically; a radially telescopic pin is arranged in the guiding cylinder and stoppers are arranged at a lower end; a first annular lug boss and a second annular lug boss are arranged at an interval from top to bottom on an outer wall of the telescopic rod; a sliding bush is sleeved between the first lug boss and the second lug boss; and the rotating mechanism is used for making the telescopic rod and the guiding cylinder to move relatively so that the limiting rod on the telescopic rod reaches the positions of the lower end surface and the upper end surface of the stoppers.

    Movable system for automatically monitoring the correlated wind and temperature field of a bridge
    110.
    发明授权
    Movable system for automatically monitoring the correlated wind and temperature field of a bridge 有权

    公开(公告)号：US11668623B2

    公开(公告)日：2023-06-06

    申请号：US17983412

    申请日：2022-11-09

    申请人： Southwest Jiaotong University ,  Southwest Petroleum University

    发明人： Jin Zhu ,  Yongle Li ,  Mengxue Wu ,  Xu Huang

    IPC分类号： G01M5/00 ,  G01W1/02 ,  G01W1/00

    CPC分类号： G01M5/0008 ,  G01M5/0075 ,  G01W1/02 ,  G01W2001/006

    摘要： A movable system for automatically monitoring the correlated wind and temperature filed of a bridge, including a bridge monitoring subsystem, a cloud server, and a client. The system monitors the meteorological parameters of a bridge surface and a temperature of a bridge structure, performs data analysis and processing on a cloud server, and performs visual data interaction by using a client. A bridge surface-specific meteorological parameter monitoring module is movable, such that the location of the sensor for meteorological data monitoring can be adjusted at any time to monitor an entire bridge deck in a time-sharing manner. A lower cantilever structure has an adjustable height, such that the sensor for meteorological data monitoring can track a height of a boundary layer of the bridge surface. A bridge structure-specific temperature monitoring module adopts distributed patch-type temperature sensors, which can detect the temperature of the bridge structure in all directions.