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公开(公告)号：US11335311B2
公开(公告)日：2022-05-17
申请号：US16487389
申请日：2017-04-26
Applicant: Dalian University of Technology
Inventor： Yulin Mei , Xiaoming Wang , Yixuan Mei
IPC: G10K11/162 , G10K11/20
Abstract: A broadband ultrathin acoustic wave diffusion structure has a plurality of acoustic wave diffusion units. Each acoustic wave diffusion unit has at least one acoustic wave propagation section, and an acoustic wave focused section communicating with the acoustic wave propagation section is arranged according to needs. The acoustic wave focused section is formed by an acoustic wave focused cavity filled with acoustic material. The acoustic wave focused cavity is a variable-section cavity. The acoustic wave propagation section is formed by a simply connected acoustic wave propagation passage with a close end. Different acoustic wave diffusion units have different lengths of the simply connected acoustic wave propagation passages. The maximum length of the simply connected acoustic wave propagation passage may be dozens or even hundreds of times of the thickness of the acoustic wave diffusion structure, which can meet the diffusion requirements for low frequency acoustic waves to the maximum extent.
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公开(公告)号：US11420257B2
公开(公告)日：2022-08-23
申请号：US17280127
申请日：2019-09-25
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY , Xiaoming Wang , Sheng Zhu , Yang Zhao , Wenyu Wang , Qing Chang , Zhiqiang Ren , Guofeng Han , Jing Shi , Tao Teng , Yu Sun , Zhiyong Qin
Inventor： Wei Dong , Yao Meng , Sheng Zhu , Xiaoming Wang , Yang Zhao , Yanyang Wang , Fumin Xu , Zhaofeng Bai , Yang Han , Guobin Li , Wenyu Wang , Qing Chang , Zhiqiang Ren , Jing Shi , Guofeng Han , Tao Teng , Yu Sun , Zhiyong Qin
Abstract: An apparatus for efficiently preparing spherical metal powder for 3D printing includes a housing, a crucible and a powder collection area arranged in the housing, wherein a turnplate arranged in the collection area is an inlaid structure. A material having a poor thermal conductivity is selected as the base of the turnplate, and a metal material having a wetting angle less than 90° with respect to droplets is selected and embedded into the base to serve as an atomization plane of the turnplate. An air hole is disposed in the turnplate. The spherical metal powder for 3D printing combines electromagnetic force breaking capillary jet flow and centrifugal atomization, which breaks through the traditional metal split mode, and makes the molten metal in a fibrous splitting.
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Patent Agency Ranking
公开(公告)号：US10356511B2
公开(公告)日：2019-07-16
申请号：US15771922
申请日：2016-07-18
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Yulin Mei , Xiaoming Wang , Yixuan Mei , Yuanxiu Wang
Abstract: 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 materials, wherein a through cavity is fabricated in the frame, the prestressed membranes or string nets and the acoustic materials are alternately arranged in the cavity, i.e., a prestressed membrane or string net is arranged, and then a layer of acoustic materials is arranged, and so on until the through cavity is fully filled. The cavity can be designed in different shapes either with a variable cross section or 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 acoustic impedance 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.
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公开(公告)号：US11386878B2
公开(公告)日：2022-07-12
申请号：US16487405
申请日：2017-04-26
Applicant: Dalian University of Technology
Inventor： Xiaoming Wang , Yulin Mei , Yixuan Mei
IPC: G10K11/168 , G10K11/00 , E04B1/84
Abstract: A broadband ultrathin sound absorption or sound insulation structure controlling an acoustic wave propagation path has at least one sound absorption unit or one sound insulation unit; and each sound absorption unit or sound insulation unit has at least one acoustic wave focused section and at least one acoustic wave absorption section. The acoustic wave focused section is formed by an acoustic wave focused cavity filled with acoustic material. The acoustic wave focused section controls the acoustic wave propagation path through the change of a section of the cavity and the change of material equivalent parameters in the cavity, so that the acoustic waves are focused and propagate along the curve. The acoustic wave absorption section realizes efficient broadband sound absorption through the filled sound absorption materials and the arranged periodic local oscillators along an ultralong path of acoustic wave absorption labyrinth passage.
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公开(公告)号：US11344950B2
公开(公告)日：2022-05-31
申请号：US17280168
申请日：2019-09-25
Applicant: Xiaoming Wang , Yang Zhao , Qing Chang , Zhiqiang Ren , Sheng Zhu , Wenyu Wang , Jing Shi , Guofeng Han , Tao Teng , Dongyang Wang , Zhanwu Peng , Zhiyong Qin , DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Xiaoming Wang , Yang Zhao , Qing Chang , Wei Dong , Fumin Xu , Zhiqiang Ren , Sheng Zhu , Wenyu Wang , Jing Shi , Guofeng Han , Tao Teng , Yao Meng , Zhaofeng Bai , Yanyang Wang , Yang Han , Guobin Li , Dongyang Wang , Zhanwu Peng , Zhiyong Qin
Abstract: An apparatus includes a housing, a crucible disposed in the housing, and a collection bin. A turnplate disposed in a powder collection area is of an inlaid structure. A concentric circular groove is provided on the atomization plane. An air hole is provided in the turnplate. The present invention combines the pulsated orifice ejection method and the centrifugal atomization method, in cooperation with the turnplate structure and subjecting the turnplate surface to induction heating, so that a metal liquid is allowed to break through the split mode of traditional molten metal, achieves a fibrous split mode that can be implemented only when an atomizing medium is an aqueous or organic solution, and prepares a high-melting-point metal powder that meets requirements, and has a controllable particle size, high sphericity, no satellite droplets, and good flowability and spreadability, and is suitable for industrial production.
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公开(公告)号：US11331724B2
公开(公告)日：2022-05-17
申请号：US17280025
申请日：2019-09-25
Applicant: Xiaoming Wang , Yang Zhao , Wenyu Wang , Qing Chang , Zhiqiang Ren , Guofeng Han , Sheng Zhu , Jing Shi , Tao Teng , Yu Sun , Zhiyong Qin , DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Xiaoming Wang , Yang Zhao , Wenyu Wang , Wei Dong , Yao Meng , Qing Chang , Zhiqiang Ren , Jing Shi , Guofeng Han , Sheng Zhu , Tao Teng , Fumin Xu , Zhaofeng Bai , Yanyang Wang , Yang Han , Guobin Li , Yu Sun , Zhiyong Qin
Abstract: An apparatus efficiently preparing ultrafine spherical metal powder includes a housing, a crucible and a powder collection area arranged in the housing. The turnplate arranged in the powder collection area is an inlaid structure. The part inlaid into the body part acts as an atomization plane of the turnplate. The atomization plane is provided with a concentric circular groove, and the turnplate is provided with an air hole. The apparatus is used for preparing ultrafine spherical metal powder by on-by-one droplets centrifugal atomization method, mainly combining the uniform droplet jet method and the centrifugal atomization method, which breaks through the traditional metal splitting model, makes the molten metal in a fibrous splitting, so as to efficiently prepare ultrafine spherical metal powder with narrow particle size distribution interval, high sphericity, good flowability, excellent spreadability, uniform and controllable size, no satellite droplets and suitable for industrial production.
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公开(公告)号：US09974587B2
公开(公告)日：2018-05-22
申请号：US15525916
申请日：2015-09-13
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Rui Wang , Xuyue Wang , Xiaoming Wang
CPC classification number: A61B17/8665 , A61B17/00234 , A61B17/320068 , A61B2017/00402 , A61B2017/22027 , A61B2017/320088 , B06B1/0611 , H01L41/0835
Abstract: 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.
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