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公开(公告)号：US12241867B1
公开(公告)日：2025-03-04
申请号：US18931067
申请日：2024-10-30
Inventor： Congze Fan , Jinghua Zheng , Zhongde Shan , Yiwei Chen , Wenzhe Song , Yufeng Jin
Abstract: A high-temperature vibration modal testing device for variable cross-section carbon fiber resin-based composites includes triangular serrated sliding rails, high-temperature steel sliding bayonets, sliding furnace door, water-cooled conduits, dual-axis sliding rail, insulation box, infrared radiation heating array, thin armored thermocouples, observation port, tapping threaded rod, tapping threaded fixture, ceramic force transmission rod, excitation source, laser vibration measurer, vibration measuring port, mechanical pump, and exhaust valve. A variable cross-section carbon fiber resin-based composite test piece is fixed to the high-temperature steel sliding bayonets and fixed to the tapping threaded fixture by the dual-axis sliding rail. During high-temperature vibration modal testing, the infrared radiation heating array provides a high-temperature thermal environment, the excitation source connected to the tapping threaded fixture provides random vibration, and thermal model measurement is performed through the laser vibration measurer. The device can perform high-temperature vibration modal testing on variable cross-section carbon fiber resin-based composites in aerospace flight environments.
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公开(公告)号：US11660662B2
公开(公告)日：2023-05-30
申请号：US17918347
申请日：2022-06-15
Inventor： Zhongde Shan , Haoqin Yang , Jianpei Shi
Abstract: An interlayer pre-cooling apparatus for a sand mold freezing printing includes a sand paving apparatus. The sand paving apparatus is located above a negative-pressure low-temperature forming chamber, and the sand paving apparatus includes several independent sand paving grooves, a hollow sand paving roller, a cooling chamber, a sand scraping plate, and an openable and closable baffle. The openable and closable baffle is rotationally arranged at a discharge port of each sand paving apparatus, and the openable and closable baffle is used for paving low temperature premixed sand on demand. The premixed molding sand is further cooled during the process of scraping and compacting low-temperature molding sand. When the apparatus is adopted for sand mold freezing 3D printing, the low temperature of the premixed molding sand is precisely controllable, which has great significance for realizing interlayer pre-cooling of the sand mold freezing printing.
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公开(公告)号：US12186970B2
公开(公告)日：2025-01-07
申请号：US18776250
申请日：2024-07-18
Inventor： Jinghua Zheng , Yiwei Chen , Congze Fan , Wenzhe Song , Yaxing Song , Zhongde Shan
Abstract: A multi-arm forming device for space on-orbit composite braiding is provided. Through the rotary movement of a combination of circularly arranged mechanical arm-type laying apparatuses relative to a mold, a plurality of hot press laying heads are controlled together to implement high-efficiency and high-freedom winding and braiding formation of a composite member. The retraction and expansion deformation of the gasbag mold is achieved by inflating and deflating based on design, and the overall device is lightened by switching its structural volume in an operating/non-operating state, thereby achieving the purpose of facilitating the lift-off of rockets and the demolding, repair and weight reduction of winding and braiding structural members for operation in space. Additionally, gas in a gasbag can be used as emergency kinetic energy for the movement and attitude adjustment of the overall device in space. High-quality and efficient winding and braiding formation of composites in space are achieved ultimately.
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公开(公告)号：US12134221B1
公开(公告)日：2024-11-05
申请号：US18777503
申请日：2024-07-18
Inventor： Wenzhe Song , Congze Fan , Jinghua Zheng , Yiwei Chen , Jingxuan Wang , Zhongde Shan
IPC: B29C48/05 , B29B15/14 , B29C48/28 , B29C48/88 , B29C48/885 , B29C64/314 , B29C70/52 , B29K105/08 , B29K307/04 , B33Y40/10 , B33Y70/10 , B29K71/00
Abstract: An on-orbit composite filament forming device for space 3D printing includes a constant tension unwinding module, a replaceable resin filament rotary wrapping module, a melt preheating chamber, a curved channel impregnation chamber, a variable aperture resin recovery device, a heat protective housing, a convective cooling device, a traction device, and a winding device. The replaceable resin filament rotary wrapping module wraps a resin filament on a surface of a carbon fiber by circumferential rotation and is provided with an active unwinding reel placed on a circular rail centered on the carbon fiber; the melt preheating chamber is used for melting resin to wrap the surface of the fiber, and is equipped with a lifting device for automatic opening and closing; the curved channel impregnation chamber is formed with a wedge-shaped high-pressure impregnation zone by mutual extrusion of upper and lower pressure blocks, thereby improving the quality of fiber impregnation.
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公开(公告)号：US12128474B2
公开(公告)日：2024-10-29
申请号：US18037783
申请日：2022-09-05
Inventor： Haoqin Yang , Zhongde Shan , Qinjiang Liu , Jianpei Shi , Dandan Yan , Shijie Dong
Abstract: A method for preparing a negative pressure film-covering frozen sand mold includes: directly obtaining a mold cavity of a sand mold through numerically controlled machining of a frozen sand blank; covering a surface, brushed with a thermal insulation coating, of the mold cavity of the sand mold with a softened thin film, and covering an outer surface of the sand mold with a back film to seal a sand box; fixing the frozen sand mold in an air extraction sand box with a vacuum chamber, and extracting air through a vacuum pump, so that the thin film tightly adheres to the sand mold through vacuum suction force; and closing the box to obtain an integral sand mold, and pouring a casting at room temperature or low temperature under negative pressure. The method is environment-friendly, and the prepared frozen sand mold has high strength and is convenient for sand cleaning.
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Patent Agency Ranking
公开(公告)号：US11823425B2
公开(公告)日：2023-11-21
申请号：US18316326
申请日：2023-05-12
Inventor： Jun Wang , Zhongde Shan , Shiyan Hua , Dawei Li
IPC: G06V10/774 , G06T7/00 , G06V10/764 , G06T7/73 , G06V10/77 , G06V10/82
CPC classification number: G06V10/774 , G06T7/0004 , G06T7/73 , G06V10/764 , G06V10/7715 , G06V10/82 , G06T2207/20021 , G06T2207/20081 , G06T2207/20084 , G06T2207/30164
Abstract: A few-shot defect detection method based on metric learning, including: (S1) performing data enhancement on a to-be-detected few-shot defect data set through a G2-Generative adversarial network (G2-GAN); (S2) extracting features of a defect data set similar to the to-be-detected few-shot defect data set based on an adaptive convolution kernel-based convolutional neural network (SKM-CNN) to generate a pre-training model; and (S3) transferring the pre-training model to a few-shot defect detection network (S2D2N) based on metric learning; and performing target feature extraction and metric learning in sequence to realize rapid identification and location of defects.
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公开(公告)号：US11544837B2
公开(公告)日：2023-01-03
申请号：US17574843
申请日：2022-01-13
Inventor： Zhongde Shan , Jun Wang , Zhengyuan Wei , Honghua Chen , Qian Xie
IPC: G06K9/00 , G06T7/00 , G06T7/55 , G06T7/70 , G06V10/74 , G06V10/75 , G06V10/24 , G06V10/10 , G01B11/16 , G01B11/00
Abstract: A method for dynamically measuring deformation of a rotating-body mold, including: (S1) subjecting an overall outer surface of the rotating-body mold to three-dimensional measurement to acquire an initial point cloud data; (S2) shooting, by a multi-camera system, the mold from different angles to obtain three-dimensional coordinates of marking points and coding points on the overall outer surface of the rotating-body mold; (S3) rotating the mold, and repeatedly photographing the marking points and the coding points on the mold surface under different angle poses; and calculating three-dimensional coordinates of the marking points and the coding points; and (S4) predicting a point cloud data of the outer surface under different angle poses based on a conversion relationship among the marking points to analyze a deformation degree of the mold during a rotation process.
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公开(公告)号：US11941329B2
公开(公告)日：2024-03-26
申请号：US18313410
申请日：2023-05-08
Inventor： Jun Wang , Tianchi Zhong , Zhongde Shan , Yuan Zhang , Kun Xiao
Abstract: A method for analyzing fuselage profile based on measurement data of an aircraft, including: acquiring point-cloud data of an aircraft via a laser scanner; selecting point-cloud data of a fuselage component from the point-cloud data of the aircraft; based on a weighted locally optimal projection (WLOP) operator and Ll median curve-skeleton concept of point cloud, extracting a medial axis from the point-cloud data of the fuselage component; uniformly sampling the medial axis into a plurality of skeleton points; extracting a discrete point set of a cross-section contour of the fuselage component; performing circle fitting on the discrete point set to obtain a fitted circle and parameters thereof; calculating a deformation displacement measurement indicator μ of the cross-section of the fuselage component to evaluate cross-section contour of the fuselage.
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公开(公告)号：US11911961B1
公开(公告)日：2024-02-27
申请号：US18242529
申请日：2023-09-06
Inventor： Zhongde Shan , Congze Fan , Jinghua Zheng , Wenzhe Song , Yiwei Chen , Kai Liu
IPC: B29C64/218 , B29C64/236 , B29C64/295 , B29L31/30 , B33Y30/00 , B33Y80/00
CPC classification number: B29C64/218 , B29C64/236 , B29C64/295 , B29L2031/3097 , B33Y30/00 , B33Y80/00
Abstract: An additive manufacturing device for an aerospace truss includes a raw material input unit, a longitudinal beam forming unit, a longitudinal beam traction unit, a cross beam forming unit and a truss support unit. The raw material input unit stores pre-impregnated wires and pre-impregnated tapes, and a motor drives rollers to convey the pre-impregnated wires and the pre-impregnated tapes forward; the longitudinal beam forming unit is composed of three sets of forming molds, and the pre-impregnated tapes form V-shaped longitudinal beams through heating molds; a stepper motor used in the longitudinal beam traction unit drives three sets of roller traction devices through steering gears to pull formed longitudinal beams; the cross beam forming unit is composed of a motion module and a printing module, and a truss cross beam is printed through a 3D printing method of molten deposition.
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公开(公告)号：US11591727B2
公开(公告)日：2023-02-28
申请号：US17707912
申请日：2022-03-29
Inventor： Jun Wang , Zhongde Shan , Xiaokang Ma , Yaoyao Wang , Haoqin Yang
Abstract: An automatic circumferential insertion apparatus and method for a complex rotary preform. The apparatus includes a double-hinge yarn carrier and a U-shaped bracket. Two ends of the double-hinge yarn carrier are respectively provided with a cylindrical hinge structure. One cylindrical hinge structure is in revolving pair connection with an outer clamping buckle at one end of the U-shaped bracket, and the other cylindrical hinge structure is in revolving pair connection with an inner clamping buckle at the other end of the U-shaped bracket. Two sides of the U-shaped bracket are provided with an electromagnet, respectively. The outer clamping buckle is provided with a pin, which is controlled by triggering, and is triggered simultaneously with the electromagnet at the side where the outer clamping buckle is arranged.
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