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    INTEGRATED SYSTEM FOR OPTICAL FIBER SENSING AND COMMUNICATION THROUGH SHARING CO-FREQUENCY RESOURCES
    4.
    发明申请
    INTEGRATED SYSTEM FOR OPTICAL FIBER SENSING AND COMMUNICATION THROUGH SHARING CO-FREQUENCY RESOURCES 有权

    公开(公告)号：US20240426640A1

    公开(公告)日：2024-12-26

    申请号：US18456144

    申请日：2023-08-25

    Applicant: SOUTHWEST JIAOTONG UNIVERSITY

    Inventor： Lianshan Yan ,  Haijun He ,  Lin Jiang ,  Anlin Yi ,  Xihua Zou ,  Wei Pan

    IPC: G01D5/353

    Abstract: The present invention discloses an integrated system for optical fiber sensing and communication through sharing co-frequency resources. Specifically, the system consists of two parts: optical path detection and circuit demodulation. The entire system consists of a continuous wave laser, a fiber coupler, a polarization controller, a mach-zehnder modulator, an arbitrary waveform generator, an erbium-doped fiber amplifier, an optical filter, an optical fiber annular, an optical fiber, a photodetector, a data acquisition device, a balance detector and a data acquisition card. A transmission optical signal and a sensing detection light are generated by the same laser, transmission performance and sensing performance of the system are changed by adjusting modulation power of a transmission signal, the transmission signal is obtained by using direct detection at far-end, a sensing signal is obtained by using heterodyne coherent detection at local-end. The present invention provides a simple, compact and high-efficiency integrated system for co-frequency sharing optical fiber sneisng and communication, to solve the deficiencies of the existing integrated system in practical applications.

    METHOD AND DEVICE FOR DETECTING TEMPERATURE RISE INSIDE SUPERCONDUCTING LEVITATION DEVICE BASED ON DEEP LEARNING
    5.
    发明公开
    METHOD AND DEVICE FOR DETECTING TEMPERATURE RISE INSIDE SUPERCONDUCTING LEVITATION DEVICE BASED ON DEEP LEARNING 审中-公开

    公开(公告)号：US20240344898A1

    公开(公告)日：2024-10-17

    申请号：US18754630

    申请日：2024-06-26

    Applicant: SOUTHWEST JIAOTONG UNIVERSITY

    Inventor： Jun ZHENG ,  Peng PANG ,  Zihan WANG ,  Chenling XIAN ,  Boyi ZHAO

    IPC: G01K11/22 ,  G01K13/00

    CPC classification number: G01K11/22 ,  G01K13/00

    Abstract: A method for detecting temperature rise inside a superconducting levitation device based on deep learning is provided. An initial vibration acceleration information, an initial temperature rise information, and a vibration acceleration detection information are obtained. Feature extraction is performed on the initial vibration acceleration information to obtain a high-frequency feature parameter set and a low-frequency feature parameter set. Wavelet band energy calculation is performed for the high-frequency feature parameter set and the low-frequency feature parameter set to obtain a wavelet band energy information. The wavelet band energy information and the initial temperature rise information are input into a preset deep learning network for training to obtain an internal temperature rise detection model of the superconducting levitation device. The detection information is input into the internal temperature rise detection model to obtain an internal temperature rise prediction information to reflect real-time temperature rise of the superconductor.

    Vehicle running system and method based on rail transport
    7.
    发明授权
    Vehicle running system and method based on rail transport 有权

    公开(公告)号：US12005942B2

    公开(公告)日：2024-06-11

    申请号：US18483469

    申请日：2023-10-09

    Applicant: Southwest Jiaotong University

    Inventor： Zigang Deng ,  Kaiwen Li ,  Jun Zheng ,  Xin Liu ,  Le Liang ,  Yihao Chen

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

    CPC classification number: B61L27/04 ,  B60L13/04 ,  B61L27/16 ,  B61L27/50 ,  B60L2200/26

    Abstract: 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.

    Method of receiving a transmitted signal over a time-varying channel and receiver thereof
    9.
    发明授权
    Method of receiving a transmitted signal over a time-varying channel and receiver thereof 有权

    公开(公告)号：US11943081B2

    公开(公告)日：2024-03-26

    申请号：US17770984

    申请日：2020-10-22

    Applicant: NANYANG TECHNOLOGICAL UNIVERSITY ,  SOUTHWEST JIAOTONG UNIVERSITY

    Inventor： Xiaobei Liu ,  Kushal Anand ,  Yong Liang Guan ,  Pingzhi Fan

    IPC: H04L25/02 ,  H04L25/03

    CPC classification number: H04L25/0224 ,  H04L25/022 ,  H04L25/03292 ,  H04L2025/03433

    Abstract: There is provided a method of receiving a transmitted signal over a time-varying channel. The method includes: obtaining a received symbol signal in frequency domain based on the transmitted signal; performing a first channel estimation based on the received symbol signal to obtain a plurality of first estimated BEM coefficients; performing a first equalization based on the received symbol signal and the plurality of first estimated BEM coefficients to obtain a plurality of first detected source symbols; and performing one or more rounds of a second channel estimation and a second equalization. Each round includes: performing the second channel estimation based on the received symbol signal and a plurality of detected source symbols to obtain a plurality of second estimated BEM coefficients; performing interference removal based on the received symbol signal, the plurality of detected source symbols and the plurality of second estimated BEM coefficients to obtain an interference reduced symbol signal infrequency domain; and performing the second equalization based on the interference reduced symbol signal and the plurality of second estimated BEM coefficients to obtain a plurality of second detected source symbols. There is also provided a corresponding receiver, and a system for wireless communication over a time-varying channel including the receiver.

    Super-compact arrayed waveguide grating (AWG) wavelength division multiplexer based on sub-wavelength grating
    10.
    发明授权
    Super-compact arrayed waveguide grating (AWG) wavelength division multiplexer based on sub-wavelength grating 有权

    公开(公告)号：US11860411B2

    公开(公告)日：2024-01-02

    申请号：US17980607

    申请日：2022-11-04

    Applicant: Southwest Jiaotong University

    Inventor： Xihua Zou ,  Changjian Xie ,  Xiaojun Xie ,  Wei Pan ,  Lianshan Yan

    IPC: G02B6/12

    CPC classification number: G02B6/12011 ,  G02B2006/12164

    Abstract: A super-compact arrayed waveguide grating (AWG) wavelength division multiplexer based on a sub-wavelength grating is provided and includes an input waveguide, a first planar waveguide, an arrayed waveguide, a second planar waveguide, and the output waveguide that are sequentially connected. The input waveguide has 1 port, and the output waveguide has 8 ports. The arrayed waveguide includes 50 equivalent uniform strip waveguides with the same length difference, and each of the equivalent uniform strip waveguides is configured as a sub-wavelength grating structure, thereby forming the effect of increasing group refractive index or transmission delay based on a slow light effect. The 8 channels with a channel spacing of 200 GHz have the minimum adjacent channel crosstalk of less than −27 dB, and the overall size is within 300×230 μm2. In the multiplexer, the overall integration size of the device is reduced by an order of magnitude.

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