Patents Assigned to Dalian University of Technology
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Patent number: 11808667Abstract: A wing model for static aeroelasticity wind tunnel test belongs to the technical field of aeroelasticity tests. In the wing model, the model steel joint and the spar frame are connected with the composite material skin. The piezometer wing ribs are arranged among the spar frame and the plurality of supporting wing ribs. The embedded piezometer tubes are arranged in the piezometer wing ribs, the lightweight filling foam is arranged among the spar frame and the plurality of supporting wing ribs. An outer surface of a frame segment formed by the lightweight filling foam, the plurality of supporting wing ribs, the piezometer wing ribs and the spar frame is covered with the composite material skin. The frame segment is assembled on the model steel joint to form the wing model for the static aeroelasticity wind tunnel test.Type: GrantFiled: November 22, 2021Date of Patent: November 7, 2023Assignee: Dalian University of TechnologyInventors: Wei Qian, Ling Xiao, Xing Li, Shaojie Ge, Weizhe Feng, Xinyu Ai
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Patent number: 11802895Abstract: The present invention belongs to the technical field of aviation electrics and electric power, and provides an aircraft grid phase angle tracker based on nonlinear active disturbance rejection, which is used to estimate the grid phase angle on AC side of an aircraft grid. A embedded generator in the aircraft grid is arranged inside a compressor of an aviation gas turbine engine, and the embedded generator is directly coupled with the aviation gas turbine engine so that the AC frequency of the embedded generator varies with the speed of the aviation gas turbine engine. The present invention applies the nonlinear active disturbance rejection technology to the phase angle tracking of the more electric aircraft grid, is simple in operation and high in accuracy, and can realize high-accuracy tracking of the grid phase angle. The method has certain extensibility and can be extended to other fields.Type: GrantFiled: February 22, 2021Date of Patent: October 31, 2023Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Ximing Sun, Ping Lin
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Patent number: 11796031Abstract: An axial displacement amplified eddy current damper is disclosed. The axial movement of a slide bar is converted into the rotation of copper sheets and generates eddy current for energy consumption. The copper sheets are rotated and amplified by adjusting the sizes of gears. The short displacement of the slide bar can cause a large angle rotation of the copper sheets, so that energy consumption efficiency is high. The damping parameter can be adjusted by adjusting the magnetic field strength of permanent magnets, the thickness of the copper sheets and the distance from the copper sheets to the permanent magnets. The permanent magnets are adopted to provide continuous magnetic field sources, without external energy, thereby generating long-term and stable vibration reduction effect.Type: GrantFiled: March 4, 2019Date of Patent: October 24, 2023Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Xing Fu, Hongnan Li, Wenlong Du
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Patent number: 11796526Abstract: The invention discloses a gas hydrate pressure maintaining replacement device and method for in-situ Raman analysis. Comprehensive experiments such as the formation/decomposition/displacement of high-pressure gas hydrates can be realized, and in-situ Raman characterization can be performed. Including reaction kettle system with temperature control unit, pressure control gas supply system, pressure holding system, replacement gas system, sample pre-cooling system, vacuum system and data acquisition and processing system. The device can solve the problem that the Raman peak position of the 512 cage is covered by the Raman peak position of the gas when the high-pressure gas hydrate is characterized in situ in the reaction kettle, at the same time, it solves the problems of sampling difficulties in ex-situ Raman characterization and experimental errors caused by sample transfer.Type: GrantFiled: August 31, 2019Date of Patent: October 24, 2023Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Yongchen Song, Jiafei Zhao, Man Li, Lei Yang, Weiguo Liu, Mingjun Yang, Yanghui Li, Zheng Ling, Yu Liu, Yi Zhang, Dayong Wang
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Patent number: 11788473Abstract: The present invention belongs to the technical field of control of aero-engines, and proposes an adaptive boosting algorithm-based turbofan engine direct data-driven control method. First, a turbofan engine controller is designed based on the Least Squares Support Vector Machine (LSSVM) algorithm, and further, the weight of a training sample is changed by an adaptive boosting algorithm so as to construct a turbofan engine direct data-driven controller combining a plurality of basic learners into strong learners. Compared with the previous solution only adopting LS SVM, the present invention enhances the control precision, improves the generalization ability of the algorithm, and effectively solves the problem of sparsity of samples by the adaptive boosting method. By the adaptive boosting algorithm-based turbofan engine direct data-driven control method designed by the present invention.Type: GrantFiled: March 19, 2020Date of Patent: October 17, 2023Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Yanhua Ma, Nan Ding, Ximing Sun, Xudong Zhao
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Patent number: 11790137Abstract: The present disclosure provides a parameter design and numerical simulation method for jet trencher nozzle, comprising the following steps: S1. designing parameters of nozzle; S2. selecting the parameters of nozzle; S3. establishing a geometric model; S4. setting boundary conditions and delineating grids; S5. performing numerical simulation using Flow-3D; and S6. performing results processing and analysis. According to the present invention, the whole process of nozzle flushing and ground breaking can be simulated, the size of the cross-section of the flushing trench is measured, and by analyzing the obtained result, the reasonability of nozzle radius parameter design can be verified, and a certain reference is provided for design of inclination angle parameters.Type: GrantFiled: August 9, 2019Date of Patent: October 17, 2023Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Li Zou, Lizhi Tang, Zhe Sun, Yanshun Zhu, Yuguo Pei, Zhiqiang Wang, Weitong Xu, Guoqing Jin, Zhen Wang
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Publication number: 20230325560Abstract: A peridynamics-based finite element method (PeriFEM) for an structural damage analysis, comprising the following steps: A1: generating finite elements of a structure, A2: generating peridynamic elements based on the finite elements; A3: calculating a global load vector; A4: calculating a global stiffness matrix; A5: formulating and solving a linear algebra equation about the global node displacement vector; A6: evaluating whether the result satisfies the convergence criteria; if so, go to step A7, if not, return to step A4; A7: increasing the external load successively and loop A3-A7 after that, until the external load exceeds the maximum external load; A8: plotting the results. The implementation of PeriFEM in software includes the following operations: B1: generating the peridynamic elements for inputting into the software; B2: programing the formulation of the element stiffness matrix in step A4 as a subroutine; and B3: setting a method for the updating the subroutine.Type: ApplicationFiled: June 22, 2022Publication date: October 12, 2023Applicant: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Fei HAN, Zhibin LI
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Patent number: 11783446Abstract: The present invention discloses a large-field-angle image real-time stitching method based on calibration. First, a calibration algorithm is used to solve the positional relationship between cameras, and the prior information is used to solve a homography matrix between images. The system is easy to build, and the program is simple and easy to implement; an overlapping area ROI of images can be calculated by the homography matrix between images, and an energy model thereof can be built and solved with a graph cut algorithm; the graph cut algorithm has high time complexity and depends on the number of nodes in a graph; here, images are divided into layers, and solutions are obtained layer by layer and iterated; and finally, a stitched image is further optimized by simple linear fusion of stitching seams and histogram equalization of the stitched image.Type: GrantFiled: March 5, 2020Date of Patent: October 10, 2023Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Wei Zhong, Yuankai Xiang, Haojie Li, Zhihui Wang, Risheng Liu, Xin Fan, Zhongxuan Luo
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Patent number: 11783457Abstract: A multispectral camera dynamic stereo calibration algorithm is based on saliency features. The joint self-calibration method comprises the following steps: step 1: conducting de-distortion and binocular correction on an original image according to internal parameters and original external parameters of an infrared camera and a visible light camera. Step 2: Detecting the saliency of the infrared image and the visible light image respectively based on a histogram contrast method. Step 3: Extracting feature points on the infrared image and the visible light image. Step 4: Matching the feature points extracted in the previous step. Step 5: judging a feature point coverage area. Step 6: correcting the calibration result. The present invention solves the change of a positional relationship between an infrared camera and a visible light camera due to factors such as temperature, humidity and vibration.Type: GrantFiled: March 5, 2020Date of Patent: October 10, 2023Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Wei Zhong, Haojie Li, Boqian Liu, Zhihui Wang, Risheng Liu, Zhongxuan Luo, Xin Fan
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Patent number: 11783502Abstract: The present invention relates to the technical field of digital image processing, and provides an ellipse detection acceleration method based on generalized Pascal mapping. The method comprises: step 100, extracting accurate edge points from a real image by means an edge detection method of an ellipse detection method, connecting edge points into arcs, and taking a de-noised arc set as input of an ellipse detection acceleration method; step 200, screening out a valid candidate arc combinations probably belonging to the same ellipse from the arc set input in step 100; step 300, calculating five parameters of a candidate ellipse; repeating step 200 to step 300 until all valid candidate arc combinations in the arc set and corresponding candidate ellipses are found; and step 400, clustering and verifying candidate ellipse sets, obtaining a final detected ellipse set.Type: GrantFiled: March 5, 2021Date of Patent: October 10, 2023Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Qi Jia, Xin Fan, Zhongxuan Luo, Yu Liu, Qian Wang, Risheng Liu, Yi Wang, Xiujuan Xu
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Patent number: 11768126Abstract: The present disclosure discloses a method of ship ice resistance model experiment based on non-refrigerated model ice, including the following steps: determining the overall length L1, breadth B and scale ratio ? of a selected ship model; determining the size A1 of an experimental area for placing broken ice in the ship ice resistance model experiment; determining the characteristic length of model ice; determining the quantitative proportion of the model ice for each size under the target coverage ratio c of the model; obtaining the number of the model ice for each size under the target coverage ratio according to the quantitative proportion of the model ice for each size under the target coverage ratio c and the total area A2 of the model ice; determining the geometrical shape and parameters of each size under the target coverage ratio c of the model ice.Type: GrantFiled: August 9, 2019Date of Patent: September 26, 2023Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Guiyong Zhang, Yuyan Jiang, Zhi Zong, Zhe Sun, Hao Wang, Biye Yang, Zhihong Yin, Ning Liu
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Patent number: 11766577Abstract: A flexible variable frequency ultrasonic therapeutic probe based on thermoacoustic effect of a carbon nanotube film comprises an ultrasonic sound production element, and a heat dissipation layer and an acoustic matching layer located on both sides thereof. The sound production element comprises a carbon nanotube film, metal electrodes and wires, and the shape and size of the sound production element can be adjusted according to the actual functional requirements. When a signal is accessed into the sound production element, the carbon nanotube film produces a corresponding temperature change, which causes the surrounding media to expand and contract and to excite ultrasonic waves. The present invention greatly improves the coupling efficiency between the probe and the subject, reduces the energy loss of ultrasonic waves, and enhances the uniformity of the sound intensity distribution in the affected part.Type: GrantFiled: November 18, 2022Date of Patent: September 26, 2023Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Zhenhuan Zhou, Yanxia Feng, Xinsheng Xu, Jiabin Sun, Qilin Zhang, Qianshou Qi, CheeWah Lim
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Patent number: 11767455Abstract: A superhydrophobic hemispherical array which can realize droplet pancake bouncing phenomenon is provided. The superhydrophobic hemispherical array shows an arc-shape structure which is narrow at the top and wide at the bottom, where a is the angle that substrate-gas interface goes across the gas and reaches substrate-hemisphere interface, d refers to the diameter of the contact area between hemispherical structure and substrate, s represents the space between two adjoining hemispheres, h denotes the vertical height from the top of hemisphere to substrate surface, and 70°?a?90°, 900 ?m?d ?1700 ?m, s?550 ?m, 600 ?m?h?1100 ?m, respectively. The superhydrophobic hemispherical array has a water contact angle larger than 150° and roll-off angle lower than 10°.Type: GrantFiled: May 7, 2019Date of Patent: September 26, 2023Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Jinlong Song, Liu Huang, Xin Liu, Xuyue Wang, Yuwen Sun
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Patent number: 11766799Abstract: Multi-adaptive fast loading attached air-cooled dust removal equipment is disclosed. The equipment is mainly composed of five parts: a spindle clamping mechanism, a link mechanism, a bearing connecting mechanism, an axial telescopic mechanism and a dust treatment mechanism. The equipment is connected with a tool holder through an axial connecting mechanism and installed on a machine tool. The axial telescopic mechanism forms a cavity with a processing surface, the gas flow generated by a negative pressure vacuum cleaner forms negative pressure in the cavity, and the telescopic mechanism is fixed to a machine tool spindle housing through the link mechanism to prevent the rotation of the spindle from driving the equipment to rotate and interfere with a workpiece, finally realizing rapid collection and treatment of chips.Type: GrantFiled: October 28, 2020Date of Patent: September 26, 2023Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Fuji Wang, Shen Qiu, Rao Fu, Boyu Zhang, Meng Zhao, Wei Liu, Jianwei Ma
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Publication number: 20230295487Abstract: A method for enhancing geological storage by injecting nanoparticles to stabilize CO2 microbubbles, which belongs to the technical field of multiphase flow. The method first improves the physical properties of the fluid by pre-mixing CO2 and nanoparticles, and then the fluid is transported to the underground through high-pressure pipelines, and then CO2 microbubbles containing nanoparticles are generated through a dense perforated plate arranged by an injection well to improve the dissolution rate and sweep efficiency of the gas in the saline aquifer, so as to enhance the later mixing of the fluid. The combined injection can improve CO2 storage capacity and storage safety, and further reduce the risk of gas leakage in the reservoir.Type: ApplicationFiled: March 9, 2023Publication date: September 21, 2023Applicant: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Yongchen SONG, Lanlan JIANG, Sijia WANG, Xin WANG, Mingjun YANG, Yu LIU
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Patent number: 11761930Abstract: A prediction method of part surface roughness and tool wear based on multi-task learning belong to the file of machining technology. Firstly, the vibration signals in the machining process are collected; next, the part surface roughness and tool wear are measured, and the measured results are corresponding to the vibration signals respectively; secondly, the samples are expanded, the features are extracted and normalized; then, a multi-task prediction model based on deep belief networks (DBN) is constructed, and the part surface roughness and tool wear are taken as the output of the model, and the features are extracted as the input to establish the multi-task DBN prediction model; finally, the vibration signals are input into the multi-task prediction model to predict the surface roughness and tool wear.Type: GrantFiled: March 6, 2020Date of Patent: September 19, 2023Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Yongqing Wang, Bo Qin, Kuo Liu, Mingrui Shen, Mengmeng Niu, Honghui Wang, Lingsheng Han
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Patent number: 11753976Abstract: A particulate trap filter body has asymmetrical channels. The cross-sectional shape of the asymmetrical channel structure includes a combination of hexagonal, square and triangular shapes. The hexagonal channel and the triangular channel act as inlet channel, and the square channel acts as outlet channel. Compared with the traditional symmetrical filter body structure, the inlet channel volume and filter body wall area can be effectively increased by more than 30%, which means that with capturing the same amount of particles, the particle cake layer formed on the wall surface is thinner. The limiting carbon load of the new channel structure is increased by more than 30%, having a very positive effect on reducing the regeneration frequency and prolonging the service life of the trap.Type: GrantFiled: October 8, 2019Date of Patent: September 12, 2023Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Wuqiang Long, Ge Xiao, Hua Tian, Jingchen Cui
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Patent number: 11758641Abstract: The present disclosure relates to a power supply system for improving plasma uniformity and a method thereof, wherein the power supply system includes a signal generating device, a first electrode and a second electrode. The signal generator is respectively connected with a plurality of signal processing circuits and is used for generating a plurality of initial signals at different frequencies; the signal processing circuits are used for processing the initial signals at corresponding frequencies; the plurality of signal processing circuits are all connected with the first electrode; and the initial signals are processed by the signal processing circuits and then act on the plasma through the first electrode. The present disclosure may effectively process signals in different power supplies, improve the stability of plasma discharge, reduce the impact of the coupling effect between different power supplies, and realize the independent control of ion flux and ion energy.Type: GrantFiled: April 12, 2021Date of Patent: September 12, 2023Assignee: Dalian University of TechnologyInventors: Kai Zhao, Zixuan Su, Yongxin Liu, Younian Wang
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Patent number: 11754140Abstract: The present invention discloses a coupling beam eddy current damper with shear displacement amplification. The coupling beam eddy current damper with shear displacement amplification comprises a rigid rod, rotating shafts, a pin column, pins, levers, screws, thread sleeves, copper sheets, permanent magnet components, a steel structural component, balls, ball supports and an outer shell. When vibration occurs, coupling beams on both sides of the damper are relatively vertically displaced; at this moment, two levers move up and down relative to the rigid rod; the movement causes the screws and the copper sheets to rotate; the copper sheets rotate in a magnetic field, then induced electromotive force will generates inside the magnetic field, thereby generating eddy current in the copper sheets. The eddy current effect will produce a damping force that impedes the rotation of the copper sheets.Type: GrantFiled: September 20, 2019Date of Patent: September 12, 2023Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Xing Fu, Hongnan Li, Gang Li, Xingheng Zhang, Zhiqian Dong, Wenlong Du
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Patent number: 11756204Abstract: The invention belongs to scene segmentation's field in computer vision and is a depth-aware method for mirror segmentation. PDNet successively includes a multi-layer feature extractor, a positioning module, and a delineating module. The multi-layer feature extractor uses a traditional feature extraction network to obtain contextual features; the positioning module combines RGB feature information with depth feature information to initially determine the position of the mirror in the image; the delineating module is based on the image RGB feature information, combined with depth information to adjust and determine the boundary of the mirror. This method is the first method that uses both RGB image and depth image to achieve mirror segmentation in an image. The present invention has also been further tested. For mirrors with a large area in a complex environment, the PDNet segmentation results are still excellent, and the results at the boundary of the mirrors are also satisfactory.Type: GrantFiled: June 2, 2021Date of Patent: September 12, 2023Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Wen Dong, Xin Yang, Haiyang Mei, Xiaopeng Wei, Qiang Zhang