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公开(公告)号：US12241732B2
公开(公告)日：2025-03-04
申请号：US17701763
申请日：2022-03-23
Inventor： Jun Wang , Zhongde Shan , Hao Tang , Yuanpeng Liu
Abstract: A device for automatically detecting a through-hole rate of a honeycomb sandwich composite-based acoustic liner, including a customized tooling, a data acquisition system, a motion mechanism and a data processing system. The data acquisition system is configured to acquire a surface three-dimensional (3D) point cloud data of an acoustic liner using a two-dimensional (2D) laser profile sensor in a manner of parallel movement shooting, and connected with a graphics workstation. The motion mechanism includes an industrial robot, and the 2D laser profile sensor is fixed at an end of the industrial robot. The motion mechanism is configured to support the data acquisition system to perform translational scanning. The data processing system includes the graphics workstation, and plays a role of path planning and data storage. A method for automatically detecting a through-hole rate of a honeycomb sandwich composite-based acoustic liner is also provided.
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12.发明授权公开(公告)号：US12011882B1
公开(公告)日：2024-06-18
申请号：US18520581
申请日：2023-11-28
Inventor： Congze Fan , Wenzhe Song , Zhongde Shan , Yiwei Chen , Jinghua Zheng , Yaxing Song
IPC: G06T15/00 , B29C64/393 , B33Y50/02 , G06F30/10 , G06F113/10
CPC classification number: B29C64/393 , B33Y50/02 , G06F30/10 , G06F2113/10
Abstract: A path planning method based on dynamic contour offset discretization and for spatial curved-surface printing is provided. Firstly, transversal equal slicing is carried out on a target model, and single/double contours are labeled; secondly, central slicing is carried out on the model, curvature contours are discretized, feature values of contour offsets of slice layers are calculated on the basis of a surface contour curvature of the model, and dynamic offset filling for inner contours of horizontal slices is realized; then longitudinal equal slicing is carried out on the slices, and spatial discrete points of the target model are obtained; and finally, virtual double contours are constructed for the single contours, and labeling processing for the discrete points is carried out, so that a discretized three-dimensional spatial equidistant lattice of the target model is obtained.
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13.发明授权公开(公告)号：US11945026B1
公开(公告)日：2024-04-02
申请号：US18523890
申请日：2023-11-30
Inventor： Zhongde Shan , Haoqin Yang , Jianpei Shi
Abstract: A multi-path internal microporous efficient refrigeration method and device for a frozen sand mold is provided. The device includes a frozen sand molding chamber, an electric lifting platform, a teflon porous lining, a removable porous aluminum plate, a frozen sand mold refrigeration device box, a sealing cover plate, an ultrasonic piezoelectric sheet, a U-shaped condenser tube, an ultrasonic generator, and a low-temperature refrigeration system. The teflon lining and the removable porous aluminum plate are provided with through hole structures of the same size and shape for rapid cooling from the surface to core of molding sand. The lifting platform is opened and the bumpy-ridge teflon lining rises to a highest point to facilitate demolding. The high- and low-frequency dual mode of the ultrasonic piezoelectric sheet can be used for vibrating and compacting the frozen sand mold, and can also assist in cutting forming.
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14.发明授权公开(公告)号：US11926098B1
公开(公告)日：2024-03-12
申请号：US18243651
申请日：2023-09-07
Inventor： Zhongde Shan , Congze Fan , Wenzhe Song , Yiwei Chen , Jinghua Zheng , Linlin Luo
IPC: B29C64/321 , B29C64/118 , B33Y30/00
CPC classification number: B29C64/321 , B29C64/118 , B33Y30/00
Abstract: A wire feeding mechanism suitable for fused deposition Additive Manufacturing (AM) of a flexible wire is provided, which includes a support housing. A melting nozzle is arranged at the lower end of the support housing, a hook is connected to the inner wall of the top end of the support housing, a connecting rod is connected to the inner wall of one side of the support housing, a wire drawing mechanism is connected to one end of the connecting rod, the wire drawing mechanism is located at the lower end of the hook, a limiting mechanism and a wire guide mechanism are connected to the inner wall of one side of the support housing, the limiting mechanism is located at the lower end of the wire drawing mechanism, the wire guide mechanism is located at the lower end of the limiting mechanism.
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Patent Agency Ranking
公开(公告)号：US11790517B2
公开(公告)日：2023-10-17
申请号：US18306166
申请日：2023-04-24
Inventor： Jun Wang , Zhongde Shan , Shuyi Jia , Dawei Li , Yuxiang Wu
CPC classification number: G06T7/0004 , G06T7/73 , G06T2207/20016 , G06T2207/20081
Abstract: A subtle defect detection method based on coarse-to-fine strategy, including: (S1) acquiring data of an image to be detected via a charge-coupled device (CCD) camera; (S2) constructing a defect area location network and preprocessing the image to be detected to initially determine a defect position; (S3) constructing a defect point detection network; and training the defect point detection network by using a defect segmentation loss function; and (S4) subjecting subtle defects in the image to be detected to quantitative extraction and segmentation via the defect point detection network.
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16.发明授权公开(公告)号：US11969943B1
公开(公告)日：2024-04-30
申请号：US18536236
申请日：2023-12-12
Inventor： Yiwei Chen , Jinghua Zheng , Zhongde Shan , Wenzhe Song , Congze Fan , Hao Zhang
IPC: B29C64/295 , B29C64/232 , B29C64/245 , B33Y30/00 , B33Y70/10
CPC classification number: B29C64/295 , B29C64/232 , B29C64/245 , B33Y30/00 , B33Y70/10 , B29K2905/02
Abstract: A hot bed deformation tolerance structure for a large-sized continuous fiber high-temperature 3D printer is provided. Size changes caused by thermal expansion of a hot bed are compensated through motion coordination of a secured hot bed support assembly and a motion device, especially for an aluminum alloy material. A Z-direction motion structure of this structure is fixedly mounted with a frame and works at room temperature. A compensation motion module is fixedly mounted with a Z axis and incompletely secured with the hot bed support assembly, and works at room temperature with the Z axis. The hot bed support assembly is incompletely secured and partially in a high-temperature chamber, with a maximum working temperature of 300° C. The hot bed support assembly retains motion redundancy in a direction of thermal expansion deformation, tolerates thermal deformation through a linear motion module, and compensates for metal deformation through horizontal motion coordination.
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公开(公告)号：US11830164B2
公开(公告)日：2023-11-28
申请号：US18316317
申请日：2023-05-12
Inventor： Jun Wang , Zhongde Shan , Kaijun Zhang , Zikuan Li , Chao Li
IPC: G06T3/40
CPC classification number: G06T3/4046
Abstract: This application discloses a semantic learning-based down-sampling method of point cloud data of an aircraft, including: (S1) constructing a multi-input encoder based on feature learning according to point cloud semantic learning principle; inputting the point cloud data of the aircraft and feature point data into the multi-input encoder for feature fusion followed by decoding using a decoder the multi-input feature fused data to obtain to-be-measured data; (S2) constructing and training a point cloud feature weight calculation network based on semantic learning to acquire a feature weight of each point in the to-be-measured data; and (S3) performing spatial weighted sampling on the feature weight of each point in the to-be-measured data followed by down-sampling based on Gaussian distribution-based spatial sampling principle.
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公开(公告)号：US11661686B2
公开(公告)日：2023-05-30
申请号：US17702145
申请日：2022-03-23
Inventor： Zhongde Shan , Jun Wang , Yaoyao Wang , Haoqin Yang , Chao Li
Abstract: A mechanism for radially inserting a yarn into a 3D braided preform, including a first bracket, an upper linear actuator, a support mechanism, an upper yarn insertion device, a yarn carrying device, an upper gear ring, a lower yarn insertion device, a lower linear actuator, a second bracket, a lower gear ring, a lower gear, a lower motor, a lower circular track, an upper circular track, a base, an upper gear, a pneumatic transmission and control device and an upper motor.
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公开(公告)号：US11557029B2
公开(公告)日：2023-01-17
申请号：US17574827
申请日：2022-01-13
Inventor： Zhongde Shan , Jun Wang , Anyi Huang , Qian Xie
IPC: G06T7/00 , G06T7/50 , G06T7/11 , G06V10/77 , G06V10/774 , G06V20/70 , G06T7/30 , G06V10/776 , G06V10/25 , G06V10/26
Abstract: A method for detecting and recognizing surface defects of an automated fiber placement composite based on an image converted from point clouds, including: acquiring a surface point cloud of the automated fiber placement composite; fitting a plane to surface point data; calculating a distance from each point of the surface point cloud to a fitted plane; enveloping the surface point cloud by OBB, and generating a grayscale image according to the OBB and the distance; constructing a pre-trained semantic segmentation network for defect of fiber placement, and inputting the grayscale image to segment and recognize defect areas thereon; mapping a segmentation result output by the semantic segmentation network to the point cloud followed by defect evaluation and visualization.
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