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公开(公告)号：US11609430B2
公开(公告)日：2023-03-21
申请号：US17065788
申请日：2020-10-08
Applicant: Arizona Board of Regents on behalf of the University of Arizona , BEIJING INSTITUTE OF TECHNOLOGY
Inventor： Dewen Cheng , Yongtian Wang , Hong Hua
Abstract: A tiled head-mounted display device, comprising: an optical component including a plurality of prisms with free-form surfaces, each prism being a wedge prism comprising a first optical surface, a second optical surface and a third optical surface; and a display component including a plurality of micro-displays, wherein the number of the micro-displays and the number of the prisms with free-form surfaces is identical. The tiled head-mounted display device according to the present invention is compact and light, provides wide field of view and high resolution, especially for the optical tiling head-mounted display device, the exit pupil planes of each display channels are coincident, thus avoiding pupil aberration and keeping exit pupil diameter and eye clearance same as the single ocular. There is no resolution variance throughout the entire field of view, thus preventing extra trapezoid distortion. The tiled head-mounted display device according to the present invention can be readily applicable to augmented environments applications by simply adding an auxiliary free-form lens behind the free-form prism.
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82.发明授权公开(公告)号：US11604172B2
公开(公告)日：2023-03-14
申请号：US17329585
申请日：2021-05-25
Applicant: BEIJING INSTITUTE OF TECHNOLOGY
Inventor： Chunguang Xu , Shuangyi Li , Yuren Lu , Peng Yin , Dezhi Li , Wenyuan Song
Abstract: An ultrasonic monitoring probe for internal service stress of a marine structural component. The probe includes a detection wedge provided with two symmetrically arranged inclined surfaces at its top, two connecting channels vertical to the two inclined surfaces and penetrating through the detection wedge and provided with threaded holes close to the inclined surfaces and water storage cavities far away from the inclined surfaces, two ultrasonic transducers mounted in the threaded holes of the two connecting channels and configured for generating and receiving ultrasonic waves; two bottom rings located at a bottom of the detection wedge and arranged relative to the water storage cavities and configured for attachment to a surface of a detected component, a magnet disposed in a magnet placement hole arranged at a central position between the two connecting passages, and a monitoring device electrically connected with the two ultrasonic transducers.
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83.发明申请公开(公告)号：US20220410910A1
公开(公告)日：2022-12-29
申请号：US17777896
申请日：2021-05-28
Applicant: Beijing Institute Of Technology
Inventor： Yechen Qin , Yiwei Huang , Ehsan Hashemi , Amir Khajepour , Zhenfeng Wang
Abstract: The present disclosure relates to a method and system for integrated path planning and path tracking control of an autonomous vehicle. The method includes: obtaining five input control variables and eleven system state variables of an autonomous vehicle at current time; constructing a vehicle path planning-tracking integrated state model according to the obtained variables at the current time; enveloping external contours of two autonomous vehicles using elliptical envelope curves to determine elliptical vehicle envelope curves of the two autonomous vehicles, respectively; determining time to collision (TTC) between the vehicles according to elliptical vehicle envelope curves and vehicle driving states; establishing an objective function of a model prediction controller (MPC) according to the model; and solving the objective function based on the TTC, and determining input control variables to the MPC at the next time. Autonomous vehicle collision avoidance can be achieved according to the present disclosure.
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公开(公告)号：US20220326532A1
公开(公告)日：2022-10-13
申请号：US17850718
申请日：2022-06-27
Inventor： Juan LIU , Zhihao XING , Xinhui DUAN
Abstract: A diffractive image combiner is provided, to increase an exit pupil dimension, thereby improving user experience. The diffractive image combiner includes a first diffractive optical element DOE and a second diffractive optical element DOE. The first diffractive optical element DOE is parallel to the second diffractive optical element DOE. A grating vector of a first incidence point in the first diffractive optical element DOE is the same as a grating vector of a second incidence point in the second diffractive optical element DOE. The first incidence point is used to convert an incident light ray that meets a Bragg condition into a first diffracted light ray and a first transmitted light ray. The first transmitted light ray is incident to the second incidence point. The second incidence point is used to convert the first transmitted light ray into a second diffracted light ray.
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公开(公告)号：US20220313821A1
公开(公告)日：2022-10-06
申请号：US17492060
申请日：2021-10-01
Applicant: BEIJING INSTITUTE OF TECHNOLOGY
Inventor： Lan JIANG , Yunlong MA , Jie HU
Abstract: The present disclosure relates to a multifunctional therapeutic biological material and preparation method thereof. The process steps of the preparation method are as follows: (1) preparing various three-dimensional micro/nano composite structure on the surface of a biomedical material by using femtosecond laser double pulses; (2) further preparing a nano-flower structure on the three-dimensional micro/nano composite structure by using hydrothermal synthesis method to construct a heterogeneous structure consisting of the three-dimensional micro/nano composite structure and the nano-flower structure; (3) putting the prepared heterogeneous structure into a mixed solution containing gold ions and platinum ions, and by using ultraviolet light reduction method, reducing in situ into gold-platinum bimetallic nanoparticles on the heterogeneous structure to obtain the multifunctional therapeutic biological material. The multifunctional therapeutic biological material provided by the present disclosure has excellent light-to-heat conversion characteristics, and it can promote bone regeneration, and has functions of tumor treatment and anti-bacterial infection.
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Patent Agency Ranking
86.发明申请公开(公告)号：US20220207206A1
公开(公告)日：2022-06-30
申请号：US17559319
申请日：2021-12-22
Applicant: BEIJING INSTITUTE OF TECHNOLOGY
Inventor： Zhijing ZHANG , Qimuge SAREN , Xin JIN , Dongsheng ZHU , Xiao CHEN , Jian XIONG , Ke Shang
Abstract: The embodiments of the present disclosure provide a physical digital twin modeling method and apparatus for an assembly, an electronic device and a medium. The physical digital twin modeling method for the assembly includes: generating a geometric distribution error surface of an assembly surface of a part; establishing an ideal model of the part without the geometric distribution error surface; integrating the geometric distribution error surface with the ideal model to establish a geometric distribution error integrated model of the part; assembling the geometric distribution error integrated model on a computer to establish a geometric digital twin model; and adding physical conditions to the geometric digital twin model of the assembly to establish a physical digital twin model of the assembly.
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公开(公告)号：US11312357B2
公开(公告)日：2022-04-26
申请号：US16878709
申请日：2020-05-20
Applicant: BEIJING INSTITUTE OF TECHNOLOGY
Inventor： Hui Liu , Yang Liu , Lijin Han , Huibin Xin
Abstract: An ECMS-based PHEV four-drive torque distribution method is disclosed. The method comprises: step 1, calculating an equivalent fuel consumption factor; step 2, calculating instantaneous total equivalent fuel consumption rate; step 3, converting all operating torque combinations of an engine, a BSG motor and a rear axle motor into the operating torque of a driving wheel, and determining the operating torque range of each power source; step 4, solving the minimum value of the instantaneous total equivalent fuel consumption rate within the actual operating torque range of each power source; and step 5, taking the operating torque of each power source corresponding to the minimum instantaneous total equivalent fuel consumption rate as the PHEV optimal operating torque for distribution.
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公开(公告)号：US20220080510A1
公开(公告)日：2022-03-17
申请号：US17394721
申请日：2021-08-05
Applicant: BEIJING INSTITUTE OF TECHNOLOGY
Inventor： Chunguang Xu , Yuren Lu , Peng Yin , Peilu Li , Dezhi Li , Shuangyi Li , Wenyuan Song , Zhaowei Miao
IPC: B23B5/18
Abstract: A device for controlling deformation of a large-scale crankshaft comprising a crankshaft holder that is arranged for fixing the crankshaft so that the crankshaft is aligned with an axis; a regulatory bracket that is arranged on the crankshaft holder at a position corresponding to the crankshaft; and a high-energy acoustic beam transducer that is arranged on the bracket and is provided with an end part coupled with the crankshaft. The crankshaft is fixed through the crankshaft holder, high-energy ultrasonic waves are injected into the crankshaft by the transducer, mass points in the crankshaft are driven to vibrate along the acoustic beam direction, and machining residual stress of the crankshaft is removed through the high-energy acoustic beam to realize the regulation and control of the residual stress in the material in the specific direction, so that machining precision of the crankshaft is ensured and machining deformation of the crankshaft is reduced.
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89.发明申请公开(公告)号：US20220032509A1
公开(公告)日：2022-02-03
申请号：US17348057
申请日：2021-06-15
Applicant: Beijing Institute of Technology
Inventor： Tianyang Qiu , Wei Jiang , Hongjun Wang , Tianfeng Zhou , Wenxiang Zhao , Pei Yan , Zhiqiang Liang , Zhibing Liu , Lijing Xie , Li Jiao , Xibin Wang
Abstract: Disclosed is an injection molding method for a degradable intravascular stent with a flexible mold core structure. The injection molding method includes the following steps: Step 1, winding a metal rod with a flexible metal film, and applying an inward bending stress to the flexible metal film; Step 2, fixing the flexible metal film to the metal rod, and processing a complementary structure of the degradable intravascular stent on the surface of the flexible metal film; Step 3, performing injection molding processing: Step 4, ending the injection molding, removing the mating body of the flexible metal film and the metal rod and the degradable intravascular stent formed on the surface of the flexible metal film by injection molding, performing cooling, separating the metal rod from the flexible metal film, withdrawing the metal rod, and then removing the flexible metal film to obtain a formed degradable intravascular stent.
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90.发明申请公开(公告)号：US20220032341A1
公开(公告)日：2022-02-03
申请号：US17364071
申请日：2021-06-30
Applicant: BEIJING INSTITUTE OF TECHNOLOGY
Inventor： Chunguang Xu , Peng Yin , Yuren Lu , Shuangyi Li , Wenyuan Song
Abstract: A control device for reducing and homogenizing welding residual stress by acoustic waves, comprising: a fixing tool having two rows of through holes; a plurality of ultrasonic transducers each having a body and a conical horn transmitting portion at a lower end of the body, wherein lower ends of the horn transmitting portions are fixedly connected with flanges, the horn transmitting portions of the ultrasonic transducers extend into respective through holes of the fixing tool to be in contact with welded parts below the fixing tool, the flanges are fixed to the fixing tool by bolts, and the two rows of through holes are arranged both sides of a welding seam of the welded parts; and a driving device for driving the ultrasonic transducers to operate. A corresponding control method is also provided. The control device can be used to control residual stress at the welding seam of steels.
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