中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

115 records (took 0.013 seconds)

    NON-CONTACT FORCE TYPE MICRO-ROTATING MECHANISM AND PREPARATION METHOD THEREOF
    1.
    发明申请
    NON-CONTACT FORCE TYPE MICRO-ROTATING MECHANISM AND PREPARATION METHOD THEREOF 审中-公开

    公开(公告)号：US20200381612A1

    公开(公告)日：2020-12-03

    申请号：US16879095

    申请日：2020-05-20

    Applicant: Research & Development Institute of Northwestern Polytechnical University In Shenzhen ,  Northwestern Polytechnical University

    Inventor： Yiting YU ,  Dongqin CHEN ,  Mengfei XU ,  Kai AN ,  Kui ZHOU

    IPC: H01L41/187 ,  H02N2/10 ,  H01L41/20

    Abstract: A non-contact force type micro-rotating mechanism driven by attractive/repulsive force and a manufacturing method thereof, belongs to the field of intelligent micro devices, and mainly relates to micro electromechanical system technology, precision machining technology, precision assembly and the like. The mechanism adopts the interaction force between magnetic poles to replace the connection mode of a traditional through-hole bearing pressure spring positioning shaft, so that the component part structure of the mechanism can be optimized, and the space utilization rate can be greatly improved. Moreover, the attractive force type structure also has the effect of weakening the radial vibration of the motor, and the coaxiality of the rotor and the stator is improved in the running process of the motor. Meanwhile, the rotating mechanism does not directly output shaft work, a structure can be added on the disc-shaped rotor to realize different functions, an actuator and a control object are integrated.

    PREPARATION METHOD OF FLAME-RETARDANT ULTRATHIN PEO-BASED SOLID ELECTROLYTE
    3.
    发明申请
    PREPARATION METHOD OF FLAME-RETARDANT ULTRATHIN PEO-BASED SOLID ELECTROLYTE 有权

    公开(公告)号：US20240380004A1

    公开(公告)日：2024-11-14

    申请号：US18409815

    申请日：2024-01-11

    Applicant: Northwestern Polytechnical University

    Inventor： Yue MA ,  Ting LIU

    IPC: H01M10/0565 ,  H01M10/0525

    Abstract: A preparation method of a flame-retardant ultrathin PEO-based solid electrolyte is disclosed. The method includes the following steps: preparing a CN support layer; synthesizing a flame retardant-loaded multifunctional filler: HNT@TMP; mixing and stirring PEO, LiTFSI, and HNT@TMP in a certain ratio in acetonitrile to obtain PEO-based solid electrolyte slurry; coating both sides of the CN support layer obtained in step S1 with the PEO-based solid electrolyte slurry obtained in step S3, and performing drying; and performing hot pressing to obtain a PEO-based solid electrolyte. By adopting the preparation method of the flame-retardant ultrathin PEO-based solid electrolyte, the electrochemical performance and flame retardance of a PEO-based solid polymer electrolyte are improved through a multifunctional flame-retardant filler (HNT@TMP), and the mechanical strength of the ultrathin PEO electrolyte is ensured through porous cellulose nanopaper (CN) with excellent mechanical flexibility and thermal stability, whereby the development of high energy density is facilitated.

    GLOBAL PRESSURE ACQUISITION SYSTEM AND METHOD FOR ROTATING MODEL
    5.
    发明公开
    GLOBAL PRESSURE ACQUISITION SYSTEM AND METHOD FOR ROTATING MODEL 审中-公开

    公开(公告)号：US20240118148A1

    公开(公告)日：2024-04-11

    申请号：US18181567

    申请日：2023-03-10

    Applicant: NORTHWESTERN POLYTECHNICAL UNIVERSITY

    Inventor： Limin GAO ,  Ning GE ,  Lei Wang ,  Bo Ouyang ,  Xiangfu Lei

    IPC: G01L1/24

    CPC classification number: G01L1/24

    Abstract: The disclosure discloses a global pressure acquisition system for a rotating model, including a CCD camera, a signal generator, a stroboscopic pulse LED light source, a photoelectric sensor, a preset counter, and a controller. The disclosure further discloses a global pressure acquisition method for a rotating model. The disclosure has the beneficial effects that, by using the non-contact measuring method disclosed by the present disclosure, a measured model and a flow field are not damaged, a submillimeter-level spatial resolution is achieved, it is ensured that the acquired PSP image of the rotating model is clear, and the signal to noise ratio of the image is increased.

    A CHIP-LEVEL DISC-TYPE ACOUSTO-OPTIC STANDING WAVE GYROSCOPE
    7.
    发明公开
    A CHIP-LEVEL DISC-TYPE ACOUSTO-OPTIC STANDING WAVE GYROSCOPE 审中-公开

    公开(公告)号：US20240053148A1

    公开(公告)日：2024-02-15

    申请号：US17641481

    申请日：2021-09-30

    Applicant: NORTHWESTERN POLYTECHNICAL UNIVERSITY

    Inventor： Honglong CHANG ,  Lu TIAN ,  Qiang SHEN ,  Ge YANG

    IPC: G01C19/72

    CPC classification number: G01C19/721

    Abstract: Disclosed is a chip-level disc-type acousto-optic standing wave gyroscope including a substrate and a gyroscope structure placed on an upper surface of the substrate; the substrate is in a shape of a circular disc; the gyroscope structure includes an acoustic wave drive module and an optical detection module, the acoustic wave drive module is arranged in a circular shape taking the center of the circular disc as an origin and extending outward radially, and the optical detection module is arranged in the middle of the acoustic wave drive module and is annular; the acoustic wave drive module includes an annular interdigitated transducer, a metal electrode layer group uniformly sputtered on the annular interdigitated transducer, annularly arranged metallic pillars and an annular reflection grating, respectively placed in sequence from center of the disk radially to periphery of the disk; the optical detection module includes a first grating coupler, an optical waveguide at a light source input end, a first coupler, a second coupler, an optical waveguide at a signal output end and a second grating coupler, which are connected in sequence. According to the technical solution of the disclosure, the sensitivity of gyroscope detection can be improved.

    ENERGY-EFFICIENT SAMPLE SELECTION METHOD BASED ON COMPLEXITY
    8.
    发明公开
    ENERGY-EFFICIENT SAMPLE SELECTION METHOD BASED ON COMPLEXITY 审中-公开

    公开(公告)号：US20230419171A1

    公开(公告)日：2023-12-28

    申请号：US17956170

    申请日：2022-09-29

    Applicant: Northwestern Polytechnical University

    Inventor： Yunji Liang ,  Qiushi Wang ,  Hangyu Hu ,  Zhiying Zhao ,  Lei Liu

    IPC: G06N20/00

    CPC classification number: G06N20/00

    Abstract: The invention discloses an energy-efficient sample selection method based on sample complexity, which performs sample selection on the raw data sets through two stages of inter-class sampling and intra-class sampling, the object is to select representative samples from large-scale data sets, thereby reducing the number of samples used for model training and achieving the object of lightweight training. Compared with the prior art, the invention has the following advantages: the invention proposes an energy-efficient sample selection method based on complexity, selects representative samples from large-scale datasets for efficient model training, and proves that sample complexity and model training strategies have a very important impact on the efficient training of deep neural networks. The invention also solves the problem of low efficiency of model training based on sample complexity and model training strategies, which has certain significance for alleviating the problem of low efficiency of deep learning model training.

    FIRST-ORDER DIFFERENTIAL MICROPHONE ARRAY WITH STEERABLE BEAMFORMER
    9.
    发明公开
    FIRST-ORDER DIFFERENTIAL MICROPHONE ARRAY WITH STEERABLE BEAMFORMER 审中-公开

    公开(公告)号：US20230209252A1

    公开(公告)日：2023-06-29

    申请号：US17926608

    申请日：2021-02-10

    Applicant: Northwestern Polytechnical University

    Inventor： Xin LENG ,  Jingdong CHEN

    IPC: H04R1/40 ,  H04R3/00 ,  H04R5/027 ,  G10L21/0208

    CPC classification number: H04R1/406 ,  G10L21/0208 ,  H04R3/005 ,  H04R5/027 ,  G10L2021/02166 ,  H04R2201/401

    Abstract: A first-order differential microphone array (FODMA) with a steerable beamformer is constructed by specifying a target beampattern for the FODMA at a steering angle θ and then decomposing the target beampattern into a first sub-beampattern and a second sub-beampattern based on the steering angle θ. A first sub-beamformer and a second sub-beamformer are generated to each filter signals from microphones of the FODMA, wherein the first sub-beamformer is associated with the first sub-beampattern, and the second sub-beamformer is associated with the second sub-beampattern. The steerable beamformer is then generated based on the first sub-beamformer and the second sub-beamformer. The decomposing of the target beampattern into a first sub-beampattern and a second sub-beampattern includes dividing the target beampattern into a sum of a first-order cosine (cardioid) first sub-beampattern and a first-order sinusoidal (dipole) second sub-beampattern.

    Impact test fixture capable of applying preload on composite laminate
    10.
    发明授权
    Impact test fixture capable of applying preload on composite laminate 有权

    公开(公告)号：US11486805B2

    公开(公告)日：2022-11-01

    申请号：US16875788

    申请日：2020-05-15

    Applicant: Northwestern Polytechnical University

    Inventor： Yuan Hu ,  Yaoyao Shi ,  Dongsheng Liu ,  Zhongxi Zhang

    IPC: G01N3/00 ,  G01N3/303 ,  G01N3/02

    Abstract: An impact test fixture capable of applying preload on a composite laminate, which is composed of a base, a clamping mechanism and a loading mechanism, where the clamping mechanism is positioned on an upper surface of the base and fixedly connected to the base through a bolt, and the loading mechanism is installed at an end of the base. A composite laminate is placed in a rectangular groove of the base. A first wedge block and a second wedge block are positioned in a base sliding groove between a pressing block and a baffle plate, and inclined planes of the two wedge blocks are oppositely installed; the baffle plate is matched with the base through a first fixing bolt and a second fixing bolt, a loading bolt passes through a screw hole at a side end of the base and is matched with the first wedge block.

Patent Agency Ranking