公开(公告)号：US20210174121A1

公开(公告)日：2021-06-10

申请号：US17059474

申请日：2020-06-13

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Wenlong LI ,  Cheng JIANG ,  Gang WANG ,  Zelong PENG ,  Han DING

IPC: G06K9/46 ,  G06K9/62 ,  G06K9/00

Abstract: The disclosure discloses a method for extracting a boundary of a thin-walled part with small curvature based on three-dimensional point cloud. The method includes: collecting point cloud data of a part to reduce density of the point cloud data, performing Euclidean cluster to divide into point cloud pieces, obtaining triangular mesh surfaces for each point cloud triangulation; extracting a boundary vertex of each triangular mesh surface to obtain a contour thereof, selecting a contour of the part among all contours; searching with each point on the contour as a center to form a three-dimensional boundary point cloud band; projecting the three-dimensional boundary point cloud band to a plane, orderly extracting two-dimensional boundary points within the plane, and arranging corresponding points in the three-dimensional boundary point cloud band according to an order of ordered boundary points within the plane to obtain ordered boundary points in the three-dimensional boundary point cloud band.

公开(公告)号：US20210076503A1

公开(公告)日：2021-03-11

申请号：US16340380

申请日：2018-04-09

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Yongan HUANG ,  Zhouping YIN ,  Hao WU ,  Jiankui CHEN ,  Wenlong LI ,  Kun BAI

IPC: H05K3/20 ,  B29C64/112 ,  B29C64/194 ,  B29C64/245 ,  B29C64/379 ,  B33Y40/00 ,  B33Y10/00 ,  B33Y30/00 ,  H05K1/02 ,  G01B11/24

Abstract: The invention belongs to a related field of electronic manufacturing technology, and particularly relates to a conformal manufacturing device and a method for a complex curved-surface electronic system, the system includes a support platform and a six-degree-of-freedom spherical motor linkage platform, a 3D measurement module, a laser lift-off module, a curved-surface transfer printing module and a conformal jet printing module respectively mounted on the support platform and independently controllable, and specific structures and work modes of these key components are improved. The invention further discloses a corresponding manufacturing method. Through the invention, multiple process flows required in conformal manufacturing process of the complex curved-surface electronic system are effectively integrated into an integrated device, so as to realize conformal hybrid manufacturing of the rigid/flexible curved-surface electronic system with arbitrary area, and the invention has advantages of high precision, high efficiency and high automation, which greatly broadens the application scope of the curved-surface electronic manufacturing technology.

公开(公告)号：US20210173966A1

公开(公告)日：2021-06-10

申请号：US17059469

申请日：2020-06-13

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Wenlong LI ,  Cheng JIANG ,  Gang WANG ,  Zelong PENG ,  Han DING

IPC: G06F30/10 ,  G06K9/62 ,  G06T17/30 ,  G09C1/00

Abstract: The disclosure discloses a method for constructing actual processing curve of part with small curvature based on a point cloud boundary. The method includes: (a) encrypting a three-dimensional ordered boundary curve of a part to be processed; (b) fitting encrypted boundary points into a plane, and projecting each boundary point into the plane to obtain a projection point; (c) performing Euclidean cluster within the plane to obtain point sets, and fitting the obtained point sets into a straight line; (d) performing the Euclidean cluster on projection points that are not fitted into the straight line to obtain corner point sets, and fitting a sharp corner or a rounded corner of the corner point sets to obtain a fitted boundary curve within the plane; (e) mapping the fitted boundary curve to a curved surface of the three-dimensional ordered boundary curve to obtain an actual processing curve of the part to be processed.