Patents Assigned to Dalian University of Technology
  • Patent number: 11981978
    Abstract: A method for preparing high-purity nickel-based superalloy includes the steps of: performing electron beam smelting on small cylinders in a first water-cooled copper crucible after preheating an electron gun, and converging the beam to the edge of one side of the ingot; turning on the electron gun again after completely solidifying the ingot, the electron beam spot uniformly and slowly scanning a surface of the ingot from a side opposite to a final beam converging area of the ingot to the final beam converging area of the ingot to ensure that the alloy at a position scanned by the electron beam spot is completely melted, and stopping scanning once scanning to the final converging area of the ingot; casting the molten alloy in the first water-cooled copper crucible to the second water-cooled copper crucible; taking out the refined nickel-base superalloy after cooling down the electron beam melting furnace.
    Type: Grant
    Filed: June 12, 2020
    Date of Patent: May 14, 2024
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Yi Tan, Xinpeng Zhuang, Longhai Zhao, Xiaogang You, Pengting Li, Yinong Wang
  • Patent number: 11980874
    Abstract: An alkali metal ion modified titanium silicalite zeolite TS-1 for gas phase epoxidation of propylene and hydrogen peroxide and a preparation method thereof. The method includes: 1: preparing an alkali metal hydroxide modification solution containing a small amount of TPA+ ions; 2: conducting a controlled hydrothermal treatment on a TS-1 zeolite matrix by using the alkali metal hydroxide solution containing a small amount of TPA+ ions; and 3: conducting post-treatment on the hydrothermally modified TS-1 zeolite. In the washing process, the modified TS-1 zeolite wet material is washed with a low concentration alkali metal hydroxide solution; and alkali metal ions are reserved on the silicon hydroxyl of the modified titanium silicalite zeolite. The prepared alkali metal ion modified titanium silicalite zeolite has significantly improved catalytic performance in the gas phase epoxidation of propylene and hydrogen peroxide.
    Type: Grant
    Filed: April 14, 2020
    Date of Patent: May 14, 2024
    Assignees: DALIAN UNIVERSITY OF TECHNOLOGY, DALIAN QIYUAN TECHNOLOGY CO., LTD.
    Inventors: Hongchen Guo, Cuilan Miao, Quanren Zhu
  • Patent number: 11973569
    Abstract: A method for request scheduling in an unmanned aerial vehicle-assisted mobile edge computing network: determining multiple feasible UAV deployment points based on obstruction information in a target area; randomly selecting U feasible UAV deployment points from the multiple feasible UAV deployment points as UAV deployment points; dividing each UAV into multiple virtual UAVs; allocating user requests in a central queue of a UAV-assisted MEC to the virtual UAVs; using a round-robin policy to schedule the user requests allocated to each virtual UAV; after a specified time period t, if a network pressure mitigation condition isn't met, inputting historical user request data of each feasible UAV deployment point into a trained MT-LSTM neural network model, obtaining a to-be-processed data volume of each feasible UAV deployment point in a next specified time period t; re-determining UAV deployment points; redeploying UAVs carrying small cell base stations based on the new UAV deployment points.
    Type: Grant
    Filed: October 26, 2021
    Date of Patent: April 30, 2024
    Assignee: Dalian University of Technology
    Inventors: Zichuan Xu, Qiufen Xia, Haiyang Qiao
  • Patent number: 11969846
    Abstract: The present invention proposes an in-situ freezing machining method for an integrated thin-walled array structure. In the method, the area among cups is cut off first; then, the outer walls of a cup array are machined; and finally, water filling and freezing are carried out, and in-situ freezing machining of the inner walls of the cup array is carried out. Then, hoisting and turning over are carried out, and the area among cavities is cut off; then, the outer walls of a cavity array are machined; and finally, water filling and freezing are carried out, and in-situ freezing machining of the inner walls of the cavity array is carried out. The method realizes in-situ freezing clamping of workpieces, avoids error accumulation caused by repeated installation of a fixture, and can refrigerate efficiently, suppress ambient and cutting thermal interference, and ensure the stability of freezing fixture.
    Type: Grant
    Filed: November 17, 2021
    Date of Patent: April 30, 2024
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Haibo Liu, Chengxin Wang, Yongqing Wang, Xu Li, Kuo Liu, Xiaofei Ma, Dongming Guo
  • Patent number: 11964461
    Abstract: A structurally stable composite structural chromogenic material and a preparation method thereof are provided. The structurally stable composite structural chromogenic material is formed by stacking a transparent thermoplastic polymer and a structural chromogenic material layer by layer and then thermally bonding the peripheral edges of the polymer into a whole, and the upper surface layer and the lower surface layer of the material are both thermoplastic polymers. The molded composite structure has relatively obvious structural color and good mechanical strength.
    Type: Grant
    Filed: June 3, 2020
    Date of Patent: April 23, 2024
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Bingtao Tang, Fantao Meng, Suli Wu, Shufen Zhang
  • Patent number: 11965578
    Abstract: A design method for an inerter with adaptively adjusted inertia ratio is based on a lead screw-flywheel inerter, which is to change the positions of mass blocks on a flywheel along the radial direction of the flywheel, so as to change of the moment of inertia of the flywheel, and thus to realize adaptive adjustment of the inertia ratio of the inerter. Specifically, the change of angular velocity of the flywheel is caused by the change of an external force load on a lead screw, a centrifugal force on the mass blocks in spring-mass block structures is changed by the angular velocity, and the positions of the mass blocks in the radial direction of the flywheel is determined by the balanced relation of the centrifugal force and a spring restore force, so that the design purpose is achieved.
    Type: Grant
    Filed: October 6, 2020
    Date of Patent: April 23, 2024
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Ximing Sun, Nan Duan, Yuhu Wu, Chongquan Zhong
  • Patent number: 11952734
    Abstract: The invention belongs to ecological revetments in the technical field of river ecology, which particularly involves an ecological revetment to regulate wandering rivers. The ecological revetment is composed of porous concrete-piles, ecological connecting-plates, an ecological viewing-corridor and a slope green-belt. The ecological landscape-corridor and anchor rod are placed on the upper and middle parts of the pile structure, respectively. In virtue of the innovative structure, the ecological revetment will strengthen the revetment structure, reduce the revetment settlement, prevent the revetment from moving, and enhance the overall stability of the revetment project. The ecological holes exist on the ecological connecting-plates, which is beneficial to the exchange of material and energy from the river course and the bank slope, and the holes could greatly enhance the self-cleaning capacity of the water body.
    Type: Grant
    Filed: August 27, 2020
    Date of Patent: April 9, 2024
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Xiangzhou Xu, Shijiao Dong, Ying Zhao, Hongwu Zhang
  • Patent number: 11953398
    Abstract: The present invention belongs to the technical field of disaster prevention and reduction of transmission lines, and provides a quasi-static calculation method for lateral unbalanced force of transmission lines. The present invention can quantify significant unbalanced force caused by a failed tower to an adjacent tower, thus to quantitatively evaluate cascading failure risk of transmission lines. The present invention does not need a lot of iteration, and can parametrically reveal influence of various factors on unbalanced force. The present invention quantifies influence of large deformation effect of a conducting wire on wind load, and at the same time, wind load of the conducting wire is corrected by the trapezoidal equivalent wind pressure proposed, which avoids wind load calculation error of the conducting wire caused by a relatively large vertical height difference, better reflects actual mechanical state of the lines, and optimizes existing wind load calculation method of transmission lines.
    Type: Grant
    Filed: March 10, 2022
    Date of Patent: April 9, 2024
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Xing Fu, Wenlong Du, Hongnan Li, Gang Li
  • Patent number: 11952642
    Abstract: The present invention belongs to the field of recovery of secondary resources of noble metals, and discloses a method for leaching platinum group metals from spent catalyst by UV-vis, which uses ferric oxalate complex/hydrogen peroxide-chloride salt solution as a solvent for extracting platinum group metals under the condition of UV-vis, converts the platinum group metals from metallic state to platinum group metal complex, and obtains platinum group metal lixivium to realize the leaching of the platinum group metals. The platinum leaching rate of the method of the present invention can reach more than 97%. The present invention has mild reaction conditions, realizes the green recovery of platinum group metals from spent catalyst, avoids the use of strong acids and bases and toxic substances and avoids the production of toxic gases in the leaching process, so as to reduce the environmental hazards of the spent catalyst.
    Type: Grant
    Filed: November 17, 2023
    Date of Patent: April 9, 2024
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Zhenping Qu, Xinna Zhao, Hui Wang
  • Patent number: 11951271
    Abstract: A high aspect ratio in-plane metal microneedle array, a manufacturing method and a clamping and inserting auxiliary device thereof is disclosed. A large-size metal sheet is cut into small metal sheets. A clamping tooling composed of two upper and lower metal cover plates is processed. Inner sides of the upper and the lower cover plates of the tooling are provided with grooves in which the metal sheets are placed and fastened by bolts. Wire cutting is conducted on the tooling and the metal sheets as a whole to obtain a plane metal microneedle array with a plurality of microneedle bodies. In addition, an assembling and clamping device and an inserting auxiliary device of the high aspect ratio in-plane metal microneedle array is provided. The assembled inserting auxiliary device is placed on skin, and the microneedle array is inserted into the skin through the auxiliary device.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: April 9, 2024
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Guojun Ma, Chengwei Wu, Xiaolong An, Xiao Han, Wei Zhang, Yongtao Lv, Jianli Ma
  • Patent number: 11957057
    Abstract: A CaTiO3-based oxide thermoelectric material and a preparation method thereof are disclosed. The CaTiO3-based oxide thermoelectric material has a chemical formula of Ca1-xLaxTiO3, where 0<x?0.4. The present disclosure makes it possible to prepare a CaTiO3-based thermoelectric material with properties comparable to n-type ZnO, CaTiO3, SrTiO3 and other oxide thermoelectric materials. Among them, the La15 sample has a power factor reaching up to 8.2 ?Wcm?1K?2 (at about 1000 K), and a power factor reaching up to 9.2 ?Wcm?1K?2 at room temperature (about 300 K); and a conductivity reaching up to 2015 Scm?1 (at 300 K). The CaTiO3-based oxide thermoelectric material exhibits the best thermoelectric performance among calcium titanate ceramics. The method for preparing the CaTiO3-based oxide thermoelectric material of the present disclosure is simple in process, convenient in operation, low in cost, and makes it possible to prepare a CaTiO3-based ceramic sheet with high thermoelectric performance.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: April 9, 2024
    Assignee: Dalian University of Technology
    Inventors: Huijun Kang, Tongmin Wang, Jianbo Li, Zhiqiang Cao, Zongning Chen, Enyu Guo, Yiping Lu, Jinchuan Jie, Yubo Zhang, Tingju Li
  • Patent number: 11946524
    Abstract: A double-ring shaped strong magnet array nonlinear dynamic vibration absorber for vibration mitigation of suspender cables and design method thereof, which belongs to the field of structural vibration control. The installation positions and number are designed according to the demand of vibration mitigation, and usually one is installed at the midpoint of the suspender cable. The vibration absorber consists of the inner and outer magnet ring arrays, the additional weights, the universal wheels and a base. It feeds back the control force in the opposite direction of the motion of the suspender cable during the movement, so that the vibration energy of the suspender cable is transferred to the vibration absorber and thus less is returned to the suspender cable, and the energy dissipated through the friction between the universal wheels and the base, adding air dampers and other measures, etc.
    Type: Grant
    Filed: June 15, 2020
    Date of Patent: April 2, 2024
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Yonghui An, Shijun Huang, Jinping Ou
  • Patent number: 11948284
    Abstract: The present invention belongs to the technical field of petroleum exploitation engineering, and discloses a 3D modeling method for pore-filling hydrate sediment based on a CT image. Indoor remolding rock cores or in situ site rock cores without hydrate can be scanned by CT; a sediment matrix image stack and a pore image stack are obtained by gray threshold segmentation; then, a series of pore-filling hydrate image stacks with different saturations are constructed through image morphological processing of the pore image stack such as erosion, dilation and image subtraction operation; and a series of digital rock core image stacks of the pore-filling hydrate sediment with different saturations are formed through image subtraction operation and splicing operation to provide a relatively real 3D model for the numerical simulation work of the basic physical properties of a reservoir of natural gas hydrate.
    Type: Grant
    Filed: July 23, 2020
    Date of Patent: April 2, 2024
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Yongchen Song, Yanghui Li, Peng Wu, Xiang Sun, Weiguo Liu, Jiafei Zhao, Mingjun Yang, Lei Yang, Zheng Ling
  • Patent number: 11949137
    Abstract: The present invention belongs to the field of alkaline polymer electrolyte membranes, and relates to a comb-shaped structure polybenzimidazole anion exchange membrane with high conductivity and preparation method thereof. In the invention, firstly, polybenzimidazole is grafted with the non-cationic side chains to the max grafting rate to synthesize the de-protonated comb-shaped polybenzimidazole material, avoiding the N—H in benzimidazole forms ionic binding with cationic functional groups, which will reduce the reactivity and mobility of cationic groups; then react de-protonated comb-shaped polybenzimidazole with quaternization reagent to attach the pendent side chain with cationic functional groups, making it easy to aggregate to form ion clusters and hydrophilic/hydrophobic microphase separation. The anion exchange membrane prepared in this invention has excellent conductivity, mechanical properties and alkaline stability.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: April 2, 2024
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Xuemei Wu, Gaohong He, Xiaozhou Wang, Xiaoming Yan, Tiantian Li, Wanting Chen, Xiangcun Li, Wu Xiao, Xiaobin Jiang, Fujun Cui, Yan Dai, Xuehua Ruan
  • Patent number: 11944963
    Abstract: A sliding removable coaxial capillary microfluidic chip and a preparation method therefor. The chip comprises a substrate which has a hole as a window; an alignment platform I and II are respectively fixed on both sides of the window, and the alignment platform I is internally provided with a circular groove I and a square groove I formed successively on the same axis; the alignment platform II is internally provided with a circular groove II and a square groove II formed successively on the same axis; both ends of a square capillary are respectively placed in the square groove I and II, one circular capillary enters the square groove I through the circular groove I, one end of another circular capillary is placed in a sliding platform, and the other end slides through the sliding platform and enters the square groove II through the circular groove II.
    Type: Grant
    Filed: April 14, 2021
    Date of Patent: April 2, 2024
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Shengyang Tao, Shi Feng, Wenbo Yang
  • Patent number: 11945070
    Abstract: A rocker polishing apparatus for full-aperture deterministic polishing of a planar part includes a control system, a substrate, a lifting plate, a polishing module and a measuring module. The polishing module and the measuring module are arranged on the substrate. The lifting plate is arranged between the polishing module and the measuring module. The polishing module includes a rocker mechanism, a polishing pad surface dressing mechanism, a polishing pad surface profile measuring apparatus and a continuous polishing pad mechanism. The apparatus allows the material removal rate distribution of the planar part and the surface profile of the planar part be in the normalized mirror symmetry relationship by controlling the material removal rate distribution on the surface of the planar part, thereby implementing the deterministic polishing of the planar part and ensuring the efficient convergence of the surface profile of the planar part in the polishing process.
    Type: Grant
    Filed: April 17, 2020
    Date of Patent: April 2, 2024
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Ping Zhou, Zhichao Geng, Ying Yan, Lin Wang, Kai Wang, Dongming Guo
  • Patent number: 11944959
    Abstract: An alkali metal ion modified titanium silicalite zeolite for gas phase epoxidation of propylene and hydrogen peroxide and a preparation method thereof. The method includes, at first step: preparing an alkali metal hydroxide modification solution; at second step: conducting controlled hydrothermal treatment on a TS-1 zeolite matrix by using an alkali metal hydroxide solution; and at third step: conducting post-treatment on the hydrothermally modified TS-1 zeolite, including solid-liquid separation, washing, drying and calcining. In the washing process, the modified TS-1 zeolite wet material is washed with a low concentration alkali metal hydroxide solution; alkali metal ions are reserved on the silicon hydroxyl of the modified titanium silicalite zeolite; and an infrared characteristic absorption band of a framework titanium active center modified by the alkali metal ions is in a range above 960 cm?1 and below 980 cm?1.
    Type: Grant
    Filed: April 14, 2020
    Date of Patent: April 2, 2024
    Assignees: DALIAN UNIVERSITY OF TECHNOLOGY, DALIAN QIYUAN TECHNOLOGY CO., LTD.
    Inventors: Hongchen Guo, Cuilan Miao, Quanren Zhu, Ning He, Yanhui Yi, Jiaxu Liu
  • Patent number: 11945110
    Abstract: A multi-degree-of-freedom continuum robot with a flexible target grasping function comprises a driving device module, a trunk simulation module and a nimble finger module. The trunk simulation module is composed of a rotary compression module and a bending compression module. Each module has a unified connection interface reserved at the end, and is combined and assembled according to actual needs. The driving module is arranged on the base of the robot to realize the driving operation of all cables to control the motion of the robot. The rotary compression module can simultaneously generate the motion in the forms of rotation and compression, thereby compensating for the defect of blind angle of the bending compression module. The bending compression module can realize compression deformation and bending deformation of the module independently. The nimble finger module realizes a grasping function by multi-finger collaboration.
    Type: Grant
    Filed: April 1, 2020
    Date of Patent: April 2, 2024
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Haijun Peng, Jie Zhang, Zhigang Wu, Ziyun Kan, Fei Li, Jinzhao Yang
  • Patent number: 11948333
    Abstract: A disparity image fusion method for multiband stereo cameras belongs to the field of image processing and computer vision. The method obtains pixel disparity confidence information by using the intermediate output of binocular disparity estimation. The confidence information can be used to judge the disparity credibility of the position and assist disparity fusion. The confidence acquisition process makes full use of the intermediate output of calculation, and can be conveniently embedded into the traditional disparity estimation process, with high calculation efficiency and simple and easy operation. In the disparity image fusion method for multiband stereo cameras proposed by the method, the disparity diagrams participating in the fusion are obtained according to the binocular images of the corresponding bands, which makes full use of the information of each band and simultaneously avoiding introducing uncertainty and errors.
    Type: Grant
    Filed: March 5, 2020
    Date of Patent: April 2, 2024
    Assignees: DALIAN UNIVERSITY OF TECHNOLOGY, PENG CHENG LABORATORY
    Inventors: Wei Zhong, Hong Zhang, Haojie Li, Zhihui Wang, Risheng Liu, Xin Fan, Zhongxuan Luo, Shengquan Li
  • Patent number: 11939238
    Abstract: The present disclosure provides an apparatus and a method for hydrate-based wastewater treatment and cold storage. The apparatus for hydrate-based wastewater treatment and cold storage includes a water chilling unit, a hydrate-based cold storage tank, an airflow disturbance device, a water layer positioning system, a spraying system, a suction filtration system, a heat exchange system, and a system monitoring device. The water chilling unit provides a secondary refrigerant at a low temperature. The secondary refrigerant flows through an evaporator coil in the hydrate-based cold storage tank for heat exchange. The airflow disturbance device induces hydrate nucleation. The water layer positioning system positions a contact surface between a water layer and a hydrate former after hydrate decomposition to facilitate drawing and separation of the treated upper water layer. The spraying system and the suction filtration system enhance the solid-liquid separation efficiency to improve the removal rate of pollutants.
    Type: Grant
    Filed: May 15, 2023
    Date of Patent: March 26, 2024
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Lunxiang Zhang, Yongchen Song, Xiaodong Wu, Jiazhu Bao, Chuanxiao Cheng, Zheng Ling, Jie Wang, Fan Wang, Yu Liu, Lei Yang, Mingjun Yang, Yanghui Li, Peng Wu