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    Subwavelength Grating Based on Bound States in the Continuum Optical Antenna For Optical Phased Array
    21.
    发明公开
    Subwavelength Grating Based on Bound States in the Continuum Optical Antenna For Optical Phased Array 审中-公开

    公开(公告)号：US20240280751A1

    公开(公告)日：2024-08-22

    申请号：US18616514

    申请日：2024-03-26

    Applicant: Harbin Institute of Technology, Shenzhen

    Inventor： Xiaochuan Xu ,  Weiming Yao ,  Wanchang Gao ,  Haoshuai Mou ,  Yong Yao

    IPC: G02B6/124

    CPC classification number: G02B6/124

    Abstract: The invention discloses a subwavelength grating based on bounds state in the continuum as the optical antenna for optical phased array, which includes a substrate and a grating layer atop the substrate. The grating layer includes a strip waveguide and sub-gratings symmetrically arranged on both sides of the strip waveguide. The sub-gratings may also be placed on different layers to build a multi-layer grating. The sub-grating excites the radiation modes, and destructive interference is formed between the sideward radiation modes by adjusting the width of the strip waveguide, which is used to establish the bounds state in the continuum. By designing the grating structure and adjusting the width of the strip waveguide, the invention establishes a diffraction-limited bound state in the continuum between sub-gratings to suppress sideward emission, thereby suppressing crosstalk between gratings, reducing the antenna pitch of the optical phased array, and increasing the phase-tuned beam steering range.

    Deformation-driven solid-phase extrusion device and one-step alloy bar preparation method by using same
    22.
    发明授权
    Deformation-driven solid-phase extrusion device and one-step alloy bar preparation method by using same 有权

    公开(公告)号：US12059728B2

    公开(公告)日：2024-08-13

    申请号：US17407543

    申请日：2021-08-20

    Applicant: Harbin Institute of Technology

    Inventor： Yongxian Huang ,  Yuming Xie ,  Xiangchen Meng ,  Feifan Wang ,  Junchen Li ,  Long Wan

    IPC: B22F3/093 ,  B22F3/00

    CPC classification number: B22F3/093 ,  B22F3/003

    Abstract: A deformation-driven solid-phase extrusion device and a one-step alloy bar preparation method by using the same are provided. The device includes a stir tool, an extrusion container and an ejector rod. The stir tool has an integral structure composed of an upper mounting part and a lower working part and having a hollow channel. The lower working part is disposed in a groove of the extrusion container, and the ejector rod is disposed in the hollow channel of the stir tool. The method includes adding alloy powder to the extrusion container, enabling the stir tool to exert a pressure and revolve at a high speed to cause large plastic deformation of the powder and generate heat by friction and deform among powder and the friction working surface of the working part, sintering the alloy powder and extruding the same through the hollow channel of the stir tool.

    DYNAMIC DECOUPLING CONTROL METHOD FOR MULTI-DEGREE-OF-FREEDOM PRECISION MOTION STAGE
    24.
    发明公开
    DYNAMIC DECOUPLING CONTROL METHOD FOR MULTI-DEGREE-OF-FREEDOM PRECISION MOTION STAGE 审中-公开

    公开(公告)号：US20240219869A1

    公开(公告)日：2024-07-04

    申请号：US18353900

    申请日：2023-07-18

    Applicant: Harbin Institute of Technology

    Inventor： Fazhi SONG ,  Yang LIU ,  Kaixin LIU

    IPC: G05B13/02 ,  G05B19/042

    CPC classification number: G05B13/025 ,  G05B19/0426

    Abstract: A dynamic decoupling control method for a multi-degree-of-freedom precision comprises defining a dynamic decoupling controller and parameterizing elements in the form of a finite impulse response (FIR) filter, applying a nominal decoupling control method to measure an actual position signal of an actual system and an output of a nominal decoupling controller, calculating a virtual control quantity, and optimizing an indicator function to obtain an estimated value of a coefficient to be optimized of the dynamic decoupling controller. Decoupling at medium and high frequency bands can be effectively realized with improved accuracy of decoupling, and an algorithm flow is simplified. The method is prone to engineering implementation.

    High-resolution Graphene Heterojunction Based Pressure Sensor
    25.
    发明公开
    High-resolution Graphene Heterojunction Based Pressure Sensor 审中-公开

    公开(公告)号：US20240167902A1

    公开(公告)日：2024-05-23

    申请号：US18241305

    申请日：2023-09-01

    Applicant: Harbin Institute of Technology

    Inventor： Jia ZHANG ,  Songlin LI ,  Shuai LIANG ,  Boxuan WU ,  Xinxin HE ,  Ping GUO

    IPC: G01L9/06

    CPC classification number: G01L9/06

    Abstract: The present disclosure provides a high-resolution graphene heterojunction based pressure sensor. The present disclosure relates to the technical field of pressure sensor design. The present disclosure uses a graphene/hexagonal boron nitride/graphene (G/h-BN/G) vertical heterojunction thin film as a pressure-sensitive diaphragm. A sensor substrate has a micro-nano arrayed concave cavity structure. Under the action of atmospheric pressure, the G/h-BN/G vertical heterojunction thin film generates localized internal stress, which changes an energy band structure of the vertical heterojunction thin film, and thus changes a tunneling current between the two upper and lower graphene layers, thereby reflecting the external atmospheric pressure changes. The principle of the graphene heterojunction based pressure sensor is based on tunneling effect. The tunneling current of the graphene heterojunction based pressure sensor is extremely sensitive to the internal stress on the heterojunction, so the sensor can achieve high-resolution detection of atmospheric pressure.

    Method for detecting tension force defect of steel cable
    26.
    发明授权
    Method for detecting tension force defect of steel cable 有权

    公开(公告)号：US11852610B2

    公开(公告)日：2023-12-26

    申请号：US18025403

    申请日：2021-03-19

    Applicant: HARBIN INSTITUTE OF TECHNOLOGY, SHENZHEN

    Inventor： Donglai Zhang ,  Wei Gao ,  Xueli Zhu

    IPC: G01N29/12 ,  G01N29/04

    CPC classification number: G01N29/12 ,  G01N29/048 ,  G01N2291/0234

    Abstract: A method for detecting a tension force defect of a steel cable includes the following steps: step S10: providing an excitation sensor on a first position of a steel cable to be detected and providing a detection sensor on a second position of the steel cable; step S20: obtaining a value of a tension force on the steel cable and obtaining a first display diagram corresponding to the value of the tension force; step S30: loading a white noise signal on the excitation sensor through a power amplifier; step S40: acquiring a detection signal collected by the detection sensor; step S50: uploading the detection signal to a personal computer (PC) and performing a Fast Fourier Transform (FFT) process on the detection signal; step S60: determining whether there is a defect in the steel cable, and if so, performing step S70; step S70: determining a defect position of the steel cable.

    DATA ACQUISITION AND CONTROL SYSTEM OF PULSED POWER SUPPLY FOR MULTI-LOAD
    27.
    发明公开
    DATA ACQUISITION AND CONTROL SYSTEM OF PULSED POWER SUPPLY FOR MULTI-LOAD 审中-公开

    公开(公告)号：US20230411993A1

    公开(公告)日：2023-12-21

    申请号：US17911113

    申请日：2022-06-21

    Applicant: HARBIN INSTITUTE OF TECHNOLOGY

    Inventor： Peng E ,  Jian GUAN ,  Xun MA ,  Hongtao LI ,  Weijun DENG ,  Mingjun DING ,  Chuanhui KANG ,  Songjie LI ,  Jinshui XIAO ,  Juan ZHAO ,  Jie WAN ,  Li TAN ,  Liyi LI

    IPC: H02J13/00

    CPC classification number: H02J13/00001 ,  H02J13/00017 ,  B64G2007/005

    Abstract: The present disclosure provides a data acquisition and control system of pulsed power supply for multi-load, and relates to the technical field of pulsed power. The system of the present disclosure is configured to control 18 sets of pulsed power supplies to provide 18 coils with stable and reliable excitation current featuring multiple output time sequences and flexible adjustability, such that a near-earth space plasma environment ground-based simulation device can simulate the magnetic field topology of the earth magnetosphere and realize a background magnetic field required by physical experiments. The system mainly achieves the following functions: control over charge and discharge of pulsed power supplies, selection of power supplies put in use, “delay trigger” setting, voltage monitoring, status monitoring of key components and output current display; and it is also necessary to realize failure alarm and failure handling for the purpose of ensuring the safety of equipment and personnel.

    LIQUID WATER HARVESTER BASED ON VALVE-CONTROLLED ACTIVE AIR SUPPLY
    29.
    发明公开
    LIQUID WATER HARVESTER BASED ON VALVE-CONTROLLED ACTIVE AIR SUPPLY 审中-公开

    公开(公告)号：US20230302402A1

    公开(公告)日：2023-09-28

    申请号：US18121481

    申请日：2023-03-14

    Applicant: Harbin Institute of Technology

    Inventor： Songjing LI ,  Jingxiang ZHOU ,  Teng HUA ,  Shuai YUAN ,  Tianhang YANG

    IPC: B01D53/26 ,  B01D53/04 ,  B01D5/00

    CPC classification number: B01D53/261 ,  B01D53/265 ,  B01D53/0438 ,  B01D5/0051 ,  B01D5/009 ,  B01D53/0446 ,  B01D2257/80

    Abstract: There is provided a liquid water harvester based on a valve-controlled active air supply and belongs to the field of liquid water harvesters. The present disclosure aims to address the problem of low airflow speed, high environmental humidity requirements, and auxiliary heating of an adsorption stage in the current atmospheric water harvesting technologies. In the present disclosure, the active air supply device is used to speed up the air circulation in the harvester so as to greatly shorten the adsorption time of the moisture absorbing material for the water vapor in the air and improve the heat dissipation of the micro-nano structure condensation surface. The electric valve controls the air circulation circuit and cooperates with the active air supply device. In this case, only one active air supply device can be used to complete the air supply and the condensation heat dissipation at the same time.

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