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公开(公告)号：US20210247419A1
公开(公告)日：2021-08-12
申请号：US17057019
申请日：2020-05-28
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Dazhi WANG , Xiaoyan GUO , Yuanda CI , Feng CAI , Xiao WANG , Shaoyan ZUO
Abstract: The present invention belongs to the field of ship engineering, and provides a ship real wind measuring device calibration method. In this method a ship sway simulator is build using a 2-axis ganged platform, natural wind is simulating generated using a wind tunnel flow field. Then the ship sway simulator is controlled to simulate the ship spatial motion under the disturbance of stormy waves. Furthermore, the data of the wind speed and direction is obtained under different sway angles and speeds. So that the database of wind direction and speed measurement, attitude measurement, actual wind direction and speed measurement is formed. Subsequently, a calibration model based on BP neural network is constructed using this database, a ship real wind direction and speed calibration algorithm is formed, which can calibrate a ship real wind measuring device.
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2.发明申请公开(公告)号：US20190308366A1
公开(公告)日：2019-10-10
申请号：US16303556
申请日：2018-02-05
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Dazhi WANG , Kai LI , Tongqun REN , Junsheng LIANG
IPC: B29C64/112 , B81C1/00 , B33Y10/00 , B33Y30/00 , B33Y50/02 , B29C64/209 , B29C64/227 , B29C64/295 , B29C64/393
Abstract: The present invention belongs to the field of advanced manufacturing technology and relates to one set-up and method of electrohydrodynamic jet 3D printing based on resultant effect of electric field and thermal field. This method is used to fabricate micro/nano 3D structure, under the resultant effects of electro hydrodynamic force and thermal field. First of all, the ink reaches needle orifice at a constant speed under the resultant effect of fluid field and gravity field. Then a high voltage electric field is applied between needle and substrate. And the ink is dragged to form stable micro/nano scale jet which is far smaller than the needle size using the electric field shear force generated at needle orifice. The solvent evaporation rate of ink increases combined with the radiation of thermal field at the same time. Finally, the micro/nano scale 3D structure is fabricated on substrate with the accumulation of jet layer by layer. Compared with liquid jet printing technology, this method describing in present invention owns many advantages, including wide adaptability of material and manufacturing complex micro/nano scale 3D structures.
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公开(公告)号：US20210086512A1
公开(公告)日：2021-03-25
申请号：US17047363
申请日：2020-05-28
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Dazhi WANG , Kuipeng ZHAO , Junsheng LIANG
Abstract: The present invention provides a method for electrohydrodynamic jet printing curved piezoelectric ceramics. First, a stable pressure is provided for a piezoelectric ceramic slurry to ensure that the slurry flows out from a nozzle at a fixed flow rate, and at the same time, an electric field is applied to the piezoelectric ceramic slurry at the nozzle to form a stable fine jet; then a curved substrate is fixed on a fixture of a curved substrate six-axis linkage module to ensure that the curved substrate is always perpendicular to the jet of the nozzle and keeps a constant distance from the nozzle during a printing process; fine jet drop on demand is realized through cooperative control of the changes of the curved substrate six-axis linkage module, the electric field and a flow field, and electrohydrodynamic jet printing and molding of curved piezoelectric ceramics is finally realized.
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公开(公告)号：US20200048079A1
公开(公告)日：2020-02-13
申请号：US16340655
申请日：2018-02-05
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Dazhi WANG , Xiaojun ZHAO , Tongqun REN , Junsheng LIANG
IPC: B81C1/00
Abstract: A method of manufacturing a nanobeam structure by printing, namely coaxial focused electrohydrodynamic jet printing. In this method, under the combined action of electric field, thermal field and flow field, a stable coaxial jet is formed and used to print linear bilayer encapsulated structure on a substrate with a prefabricated support structure. Within the coaxial jet, the nanoscale inner liquid consisting of functional material is encapsulated by the microscale outer liquid consisting of high viscous material, which has the capability to directly print functional nanobeam structures. This high viscous material eliminates the disturbance of external micro-environment, and plays a role of supporting the printed inner structure before complete solidification of the inner material. A nanobeam structure only consisting of inner function material is formed on the substrate when the outer high viscous encapsulated material is removed.
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