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    NOVEL ULTRATHIN ACOUSTIC IMPEDANCE CONVERTER
    2.
    发明申请
    NOVEL ULTRATHIN ACOUSTIC IMPEDANCE CONVERTER 审中-公开

    公开(公告)号：US20180310092A1

    公开(公告)日：2018-10-25

    申请号：US15771922

    申请日：2016-07-18

    申请人： DALIAN UNIVERSITY OF TECHNOLOGY

    发明人： Yulin MEI ,  Xiaoming WANG ,  Yixuan MEI ,  Yuanxiu WANG

    IPC分类号： H04R1/28 ,  H04R1/44 ,  G10K11/02

    CPC分类号： H04R1/2876 ,  G10K11/02 ,  H04R1/2873

    摘要： The present invention discloses a ultrathin acoustic impedance converter belonging to the acoustic field, which is characterized by comprising one or a plurality of impedance conversion units, wherein each impedance conversion unit is composed of a frame, a plurality of prestressed membranes or prestressed string nets, and multiple layers of acoustic material, wherein a permeable cavity is arranged in the frame, the prestressed membranes or string nets and the acoustic material are alternately arranged in the cavity, i.e., a prestressed membrane or string net is arranged, and then a layer of acoustic material is arranged, and so on until the cavity is fully filled. The cavity can be designed in different shapes, including a variable cross section and a uniform cross section. Each prestressed membrane or string net is required to be applied with prestress before being arranged in the cavity, and the magnitude of the prestress depends on the resistance value that the membrane or string net is expected to reach. The novel ultrathin acoustic impedance converter of the present invention can realize rapid change from low impedance to high impedance or from high impedance to low impedance and realize ultrathin design.

    A TYPE OF ACOUSTIC ABSORBER COMPOSED OF A MICRO-PERFORATED PLATE AND A SET OF ACOUSTIC FILTERS
    3.
    发明公开
    A TYPE OF ACOUSTIC ABSORBER COMPOSED OF A MICRO-PERFORATED PLATE AND A SET OF ACOUSTIC FILTERS 审中-公开

    公开(公告)号：US20230215411A1

    公开(公告)日：2023-07-06

    申请号：US17792026

    申请日：2021-08-31

    申请人： DALIAN UNIVERSITY OF TECHNOLOGY

    发明人： Yulin MEI ,  Xiaoming WANG ,  Yuanxiu WANG

    IPC分类号： G10K11/162 ,  G10K11/20

    CPC分类号： G10K11/162 ,  G10K11/20

    摘要： The type of acoustic absorber comprises a micro-perforated plate, a cavity behind the micro-perforated plate, a slender and curved main acoustic propagation passage communicating with the cavity, and a set of acoustic filters arranged along the main acoustic propagation passage. These acoustic filters have different cut-off frequencies and are arranged in the order of the cutoff frequencies from high to low from the open end to the closed end of the main acoustic propagation passage. The acoustic filter comprises a section of the main acoustic propagation passage and at least one cavity communicating with the main acoustic propagation passage. The type of acoustic absorber is characterized by adopting a main acoustic propagation passage to provide different phase delay for a micro-perforated plate to realize that a micro-perforated plate effectively absorbs broadband acoustic waves, and by combing the close arrangement of main acoustic propagation passage to achieve the ultra-thin structure.

    PZT TRANSDUCER-HORN INTEGRATED ULTRASONIC DRIVING STRUCTURE
    4.
    发明申请
    PZT TRANSDUCER-HORN INTEGRATED ULTRASONIC DRIVING STRUCTURE 有权

    公开(公告)号：US20170325864A1

    公开(公告)日：2017-11-16

    申请号：US15525916

    申请日：2015-09-13

    申请人： DALIAN UNIVERSITY OF TECHNOLOGY

    发明人： Rui WANG ,  Xuyue WANG ,  Xiaoming WANG

    IPC分类号： A61B17/86 ,  A61B17/00 ,  A61B17/32

    CPC分类号： A61B17/8665 ,  A61B17/00234 ,  A61B17/320068 ,  A61B2017/00402 ,  A61B2017/22027 ,  A61B2017/320088 ,  B06B1/0611 ,  H01L41/0835

    摘要： A PZT transducer-horn integrated ultrasonic driving structure consists of a nut, a bolt, a left PZT circular stack, a flange, a right PZT truncated stack and a horn. The horn, the right PZT truncated stack, the flange and the left PZT circular stack are arranged in sequence and connected via the bolt and then fastened via the nut; the right PZT transducer is a truncated cone-shaped stack formed by PZT circular plates; and the right PZT transducer and the horn are integrated to form the ultrasonic driving structure. Considering the dimension of PZT on two sides of the flange and the horn meet the requirements for ultrasonic vibration node and antinode, the dimension of round contour of the circular PZT stack and flange is reduced to increase the thickness of the truncated PZT stack and flange. With the integrated structure, the effect of reducing the contour dimension of the ultrasonic driving surgical device can be obtained, and the outer diameter is reduced to the range of 8-10 mm as compared with the range of 12-15 mm in the prior art, thereby further meeting the application requirements.