Patents Assigned to DALIAN UNIVERSITY
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Patent number: 11107750Abstract: A magnetofluid pump device for IGBT heat dissipation and a test method therefor are provided. The magnetofluid pump device uses a liquid metal as a coolant, which can absorb more heat than an ordinary water-cooling device and better dissipate heat for IGBT chips. Temperature and pressure changes in an inlet pipe and an outlet pipe of a magnetofluid pump can be monitored in real time through temperature sensors and pressure sensors, and temperature changes of the IGBT chips can be observed in real time through a thermal imager. The test method for the magnetofluid pump device for IGBT heat dissipation proposed by the present invention is simple and easy to implement. A magnetic fluid can be driven to flow by energizing positive and negative electrodes in the magnetofluid pump under the action of magnetic fields, and water-cooling equipment can dissipate heat for the magnetic fluid in the magnetofluid pump.Type: GrantFiled: August 3, 2020Date of Patent: August 31, 2021Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Xueguan Song, Kunpeng Li, Changan Zhou, Chaoyong Zong, Qingye Li, Wei Sun
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Patent number: 11104043Abstract: A thermal extrusion method to fabricate large-dimension superhydrophobic cylinder pillar arrays with droplet pancake bouncing phenomenon. Preparing thermal extrusion mold: the through-hole arrays with 0.8˜1.25 mm diameter, 0.25 mm interval space and 0.6˜1.0 mm height are first obtained on metals, and are then polished, rinsed and dried. Thermal extrusion: polymer materials are first thermally extruded on the obtained mold and cooled to room temperature. Demold: excess polymer materials flowing from the through hole are cut off and then the polymer cylinder pillar arrays are lifted off from the mold. Superhydrophobic treatment: the whole polymer sample is treated using mixed liquid spray consisting of titanium oxide nanoparticles dispersed in fluoroalkylsilane ethanol solution, and the superhydrophobic cylinder pillar arrays are obtained.Type: GrantFiled: August 28, 2017Date of Patent: August 31, 2021Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Jinlong Song, Liu Huang, Changlin Zhao, Mingqian Gao, Xin Liu
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Patent number: 11098843Abstract: A device for fixing a cylinder, the device including a first outer casing; a rotatable inner casing; a second outer casing; a plurality of curved blades; and at least one transmission. The second outer casing is in threaded connection to the first outer casing, and includes a first bearing, a second bearing, a third bearing, a first division plate including a first through hole and a first arc groove, and a second division plate including a second through hole and a second arc groove. Each curved blade includes a first connection rod having a ball head, a second connection rod pivotally connected to the first connection rod via the ball head, and a slot. The at least one transmission includes a gear shaft, a first ring gear, a first pinion, a second ring gear, a second pinion, and a shaft pin.Type: GrantFiled: May 25, 2020Date of Patent: August 24, 2021Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Guan Guan, Kaimeng He, Qu Yang
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Patent number: 11099110Abstract: A method of in-situ TEM nanoindentation for a damaged layer of silicon is disclosed. Wet etching and ion beam lithography are used for preparing a silicon wedge sample. An etched silicon wedge is thinned and trimmed by a focused ion beam; thinning uses ion beam of 30 kV: 50-80 nA, and trimming uses ion beam of 5 kV: 1-6 pA; and the top width of the silicon wedge is 80-100 nm. The sample is fixed on a sample holder of an in-situ TEM nanomechanical system by using a conductive silver adhesive. The sample is indented with a tip in the TEM, so that the thickness of the damaged layer of the sample is 2-200 nm; and an in-situ nanoindentation experiment is conducted on the damaged layer of the sample in the TEM.Type: GrantFiled: March 13, 2019Date of Patent: August 24, 2021Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Zhenyu Zhang, Junfeng Cui, Dongdong Liu
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Patent number: 11098539Abstract: A passive heave compensator, including an elastic cable, an electromagnetic damping device, a cylindrical sector, and a disc damping plate. The electromagnetic damping device includes a first cylinder including a helical coil, a permanent magnet mechanism disposed in the first cylinder, a first cover plate, a second cover plate, a first sliding shaft, a second sliding shaft, a first spring, a second spring, a first end cover, and a second end cover. The cylindrical sector includes a roof plate, a middle plate, a base plate, a first side plate, a second side plate, and a curved plate. The disc damping plate is disposed around the middle plate of cylindrical sector. The elastic cable is directly connected to the electromagnetic damping device. The electromagnetic damping device is disposed in the central part of the cylindrical sector. The middle plate is disposed between the roof plate and the base plate.Type: GrantFiled: May 25, 2020Date of Patent: August 24, 2021Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Guan Guan, Lei Wang, Yunlong Wang, Chaoguang Jin, Ming Chen, Xiaole Yang
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Patent number: 11091661Abstract: A method for preparing a large-area structural chromogenic pattern by ink-jet printing, a structural chromogenic pattern obtained by the method, and an anti-counterfeiting method based on a structural color change. A dispersion liquid containing mono-disperse colloidal microspheres with high index of refraction is printed onto a piece of paper by using an ink-jet printer, and nano-microspheres are arranged and assembled on the paper to obtain a micro-structure having the features of being ordered from a short distance and disordered from a long distance. A pretty structural color can be observed by means of the interaction of the structure with light, thus displaying a pattern, changing the angle of observation, changing the brightness of the structural color, and hiding and displaying the pattern. The method is simple and convenient, is widely applicable, and can achieve the preparation and anti-counterfeiting of a large-area structural color without external stimulation.Type: GrantFiled: March 14, 2018Date of Patent: August 17, 2021Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Suli Wu, Jie Chang, Baoqi Liu, Shufen Zhang
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Patent number: 11092501Abstract: An ultrasonic testing device and method for the connection force of interference fit. The motion control module can realize accurate positioning for the interference fit part and accurate control for motion in the circumferential direction and the axial direction; scanning increments of the circumferential direction and the axial direction are set, and the motion control module drives the interference fit part to perform circumferential and axial point scanning until the testing of the whole matching surface is completed. The ultrasonic signal measured by the point focusing water immersion probe is transmitted to a PC through a control loop in the testing process. Then the stress distribution of the matching surface is obtained through the relationship between the ultrasonic signal and contact stress Finally, the size of the connection force is calculated according to the static friction coefficient.Type: GrantFiled: June 26, 2019Date of Patent: August 17, 2021Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Xiaodong Wang, Xingyuan Wang, Zhifeng Lou, Yue Wang
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Patent number: 11079239Abstract: A method for directly planning a reentry trajectory in a height-velocity profile includes the following steps: S1, extracting an actual working parameter of an aircraft, setting the maximum value {dot over (Q)}max of a stagnation point heat flux, the maximum value qmax of dynamic pressure, and the maximum value nmax of overload according to the mission requirement, and solving the height-velocity boundary of the reentry trajectory, that is, a lower boundary of the reentry trajectory in the height-velocity profile; S2, solving a reentry trajectory of an initial descent stage according to differential equations of reentry motion, and determining a starting point of a trajectory of a gliding stage according to the trajectory of the initial descent stage; and S3, planning a trajectory in the height-velocity profile satisfying terminal constraints based on the lower boundary in the height-velocity profile, and calculating a corresponding bank angle, to obtain the reentry trajectory.Type: GrantFiled: September 24, 2020Date of Patent: August 3, 2021Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Wenya Zhou, Zhentao Nie, Feng Yang, Kai Liu, Guanjun Wang, Zhe Li, Honggang Xu, Feixiong Gao
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Patent number: 11072925Abstract: A new design and rapid construction method for flush assembly of prefabricated steel beams and floor slabs is disclosed. The upper flange of prefabricated steel beams is “” shaped, which consists of horizontal flange, vertical flange and top flange. Both beam stiffeners and studs are set on the horizontal flange, in which the former can strengthen the bearing capacity of the beam and avoid its local deformation, and the latter can fix the floor slab; prefabricated studs and precast concrete inside the vertical flange in the factory are used to constrain the deformation of upper flange. There is no limitation with respect to the form of floor slab, which is connected with the prefabricated steel beam by hitching the prefabricated rebar ring of the floor slab to the welded studs of the upper flange of the prefabricated steel beam.Type: GrantFiled: December 12, 2018Date of Patent: July 27, 2021Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Yonghui An, Weilong Huai, Feng Pan, Da Lv, Jinping Ou
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Patent number: 11072898Abstract: A combined energy dissipation scaffolding structure for preventing falling rock hazards for high and steep side slope during highway construction. The combined energy dissipation scaffolding structure mainly comprises five parts: a top surface impact-resistance system closely jointed with the existing slope surface, a top surface support system composed of 3D stereographic steel frame systems, a scaffolding body structure composed of a cross beam and support steel-pipe posts at both sides, a mountain-side anchorage system for anchoring the top surface impact-resistance system and the scaffolding body structure, and an anchoring-type steel-plate concrete composite foundation, wherein a fixed base is welded with the bottom of the steel-pipe post and is driven in the foundation soils using anchor rods.Type: GrantFiled: December 17, 2016Date of Patent: July 27, 2021Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Zhengzheng Wang, Changan Zhu, Yang Gao
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Patent number: 11071967Abstract: The invention belongs to the field of chemical separation, hydrometallurgy and resource recovery and provides a method for preparing and applying of ion-keeper adsorbent. By adjusting the pH to selective oxidation to achieve the oxidation of ferrous iron into ferric iron. Separates the iron after the hydrothermal reaction; By using of ion imprint “ion keeper” effect and biomass as raw materials, to prepare the adsorbent with internal rules, hierarchical pores and high selectivity. It can be used for deep purification of chromium solution, such as iron, aluminum, vanadium and other impurities in the solution; After the deep purification of chromium solution, then adjusting the pH, adding appropriate hydrating agent, by hydrothermal precipitation treatment of chrome, filtration, acid washing and calcination to obtain chromium oxide crystal. It achieves the purification of chromium, iron, aluminum and chromium. The recycling and comprehensive utilization of waste resources are also realized.Type: GrantFiled: March 2, 2017Date of Patent: July 27, 2021Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Wei Ma, Shibo Duan, Shuangen Yu, Fanqing Meng, Ren Wang, Jun Xu, Liyan Guo, Lei Wu, Zhuo Liu, Dazhi Tan
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Patent number: 11073455Abstract: The present invention belongs to the technical field of mechanical testing devices, and provides a transverse load stepless amplitude modulation device of multiple bolt loosing tester. The transverse load stepless amplitude modulation device of multiple bolt loosing tester consists of four parts: a transverse load stepless amplitude modulation part, a transverse load transmission part, a torque load transmission part and an axial load transmission part. The transverse load stepless amplitude modulation device of multiple bolt loosing tester of the present invention provides stepless amplitude modulation continuous transverse loads for a flange bolt set and guarantees the accuracy of the transverse loads through a feedback control system.Type: GrantFiled: July 17, 2018Date of Patent: July 27, 2021Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Qingchao Sun, Qingyuan Lin, Bao Zhang, Xiaokai Mu, Bin Yang
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Patent number: 11070056Abstract: The present disclosure belongs to the technical field of information, provides a short-term interval prediction method for photovoltaic power output, and is a short-term interval prediction method for photovoltaic power output based on a combination of a multi-objective optimization algorithm and a least square support vector machine. The present disclosure firstly proposes a similar day classification method considering both numerical value and pattern similarity to enhance the regularity of samples, then constructs an adaptive proportional interval estimation model based on dual-LSSVM model, and optimizes model parameters by using NSGA-II algorithms to realize the interval prediction of photovoltaic power output. Results obtained by the method have high accuracy, and computation efficiency meets actual application requirements. The method can also be popularized and applied in the fields of grid connection and scheduling of renewable energy sources.Type: GrantFiled: March 10, 2021Date of Patent: July 20, 2021Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Feng Jin, Jun Zhao, Xingxing Gao, Linqing Wang, Wei Wang
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Patent number: 11066805Abstract: A measuring device and method for horizontal dynamic impedance of specified foundation depth based on differential response analysis of pulse excitation. The measuring method is realized based on the measuring device. Two rigid piles with different lengths are embedded into different foundation depths. Motion characteristics of the two rigid piles in the process of collision impact with the outside are different under the same pulse excitation. Dynamic impedance of specified foundation depth is deduced from the formula according to the differential response. Single-degree-of-freedom oscillators are arranged on the pile heads of the two piles, and strain gauges are arranged on the bottoms of the single-degree-of-freedom oscillators to obtain stress states of the single-degree-of-freedom oscillators, thereby calculating the relative displacements of the single-degree-of-freedom oscillators. This is simple in structure, reliable in measurement and convenient in data collection and processing.Type: GrantFiled: March 19, 2018Date of Patent: July 20, 2021Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Jianbo Li, Weihong Liu, Zhiyuan Li, Gao Lin
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Patent number: 11060742Abstract: The present invention provides a photovoltic and thermal (PVT) heat pump system capable of achieving day-night time-shared combined cooling, heating and power using solar radiation and sky cold radiation. The system utilizes a photovoltaic power generation technology and a photovoltic and thermal (PVT heat pump technology simultaneously, both of which are relatively independent and promoted to each other in the function. The main energy sources of the system are solar radiation energy and sky long-wave cold radiation energy, and the energy is respectively transformed into electric energy, thermal energy and cold energy via a photovoltic and thermal (PVT) photoelectric-evaporation/condensation module at different times in different working modes. The system of the present invention integrates power generation.Type: GrantFiled: August 3, 2017Date of Patent: July 13, 2021Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Jili Zhang, Ruobing Liang, Chao Zhou, Shixiang Lu, Jianquan Chen
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Patent number: 11029286Abstract: An ultrasonic cutter detection method and device, the method comprises the following steps: preliminary detection: frequency amplitude detection and fall-of-potential detection, if the ultrasonic cutter fails the above two detection solutions in the preliminary detection, repeating the two detections; if the ultrasonic cutter still fails the above two detection solutions, the ultrasonic cutter is judged to be unqualified; and reinspection: free modal detection and pressure modal detection. Using differences of the ultrasonic cutters surface in micro-crack directions that result in different degrees of sensitivity of crack to different ultrasonic vibration modes, combined with the fall-of-potential method and frequency amplitude detection method, a detection rate and a detection velocity of an unqualified ultrasonic cutter can be improved.Type: GrantFiled: July 3, 2017Date of Patent: June 8, 2021Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Renke Kang, Zhigang Dong, Xianglong Zhu, Yidan Wang, Xun Zhang, Ping Zhou, Zhenyuan Jia
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Patent number: 11026410Abstract: The present invention provides a new energy-driven in-situ plankton collecting device, comprising a solar photovoltaic cell and wind power generation system, a buoyancy support system, a power supply and control system, a plankton suction and collection system, and an anchoring system. The device has the center of gravity on the lower part and vertically floats in water like a tumbler. The plankton suction and collection system is composed of a suction axial-flow pump and a collecting cod end. The bag-shaped plankton collecting cod end has the mesh aperture of less than 0.8 time the average body length of the target plankton, and can be used on both sides. The devices provided by the present invention can be used simultaneously and arranged in an array for collection and utilization of plankton as well as governance and remediation of water area environment, and thus have a favorable application prospect.Type: GrantFiled: May 23, 2018Date of Patent: June 8, 2021Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Kui You, Meiyi Wu, Zihan Zhou, Zewen Chen, Caihua Ma, Fang Zhang, Jing Dong, Ling Zhu, Chen Hou, Honggang Ma, Xintian Liu, Hua Xu, Fangxin Han, Shaojun Wang
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Patent number: 11027334Abstract: A micro-nano composite powder dedicated for laser repair of tiny crack on stainless steel surface, includes 3 wt %-7 wt % of nano-WC, 0.5 wt %-2 wt % of nano-Al2O3, 0.2 wt %-0.8 wt % of micro-V powder and the balance of micro stainless steel powder. The stainless steel powder includes 0.08 wt % of C, 0.5 wt % of Si, 1.46 wt % of Mn, 0.03 wt % of P, 0.005 wt % of S, 19 wt % of Cr, 9.5 wt % of Ni, 0.5 wt % of Mo and the balance of Fe. The micro and nano powders are mixed through ball milling and mixed with anhydrous ethanol. The composite powder is suitable for laser repair of tiny crack on the surface of stainless steel part with high toughness requirement. After laser repair, the composite powder can be fused with the substrate, the repaired layer and the substrate are metallurgically bonded at the interface, the repaired layer contains fine grains, and therefore the compatibility and fracture property of the repaired layer are improved.Type: GrantFiled: May 4, 2017Date of Patent: June 8, 2021Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Wei Jiang, Xianfeng Jiang, Yinyin Li
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Publication number: 20210164783Abstract: A method for directly planning a reentry trajectory in a height-velocity profile includes the following steps: S1, extracting an actual working parameter of an aircraft, setting the maximum value {dot over (Q)}max of a stagnation point heat flux, the maximum value qmax of dynamic pressure, and the maximum value nmax of overload according to the mission requirement, and solving the height-velocity boundary of the reentry trajectory, that is, a lower boundary of the reentry trajectory in the height-velocity profile; S2, solving a reentry trajectory of an initial descent stage according to differential equations of reentry motion, and determining a starting point of a trajectory of a gliding stage according to the trajectory of the initial descent stage; and S3, planning a trajectory in the height-velocity profile satisfying terminal constraints based on the lower boundary in the height-velocity profile, and calculating a corresponding bank angle, to obtain the reentry trajectory.Type: ApplicationFiled: September 24, 2020Publication date: June 3, 2021Applicant: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Wenya ZHOU, Zhentao NIE, Feng YANG, Kai LIU, Guanjun WANG, Zhe LI, Honggang XU, Feixiong GAO
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Patent number: 11020702Abstract: A simultaneous reaction system and method for organic material pyrolysis and combustion. The system comprises a time sharing reactor for pyrolysis and combustion, a feeder, a recovery apparatus for pyrolysis volatility products and a flue gas purifier. The whole process mainly consists of two time sharing stages of pyrolysis and combustion. The system has the advantages of cascade utilization of energy, short time of pyrolysis reaction and high efficiency of heat transfer.Type: GrantFiled: August 28, 2017Date of Patent: June 1, 2021Assignee: DALIAN UNIVERSITY OF TECHNOLOGYInventors: Aimin Li, Xin Wang, Lei Zhang