公开(公告)号：US11719123B1

公开(公告)日：2023-08-08

申请号：US17877088

申请日：2022-07-29

申请人： Beihang University

发明人： Xiang Luo ,  Zhe Zhang ,  Dongdong Liu ,  Zeyu Wu

IPC分类号： F01D25/12 ,  F01D25/14 ,  F01D5/18 ,  F01D9/04 ,  F01D25/10 ,  F01D25/08

CPC分类号： F01D25/12 ,  F01D5/18 ,  F01D5/181 ,  F01D5/185 ,  F01D9/041 ,  F01D25/08 ,  F01D25/10 ,  F01D25/14 ,  F05D2220/323 ,  F05D2240/12 ,  F05D2260/205 ,  F05D2260/207 ,  F05D2260/213

摘要： An integral cooling system for a turbine casing and guide vanes in an aeroengine is provided, belonging to the field of research on flow and heat exchange of a turbine casing in an aeroengine. An inner guide ring and multiple of guide vanes are mounted on the turbine casing; the cooling system includes an electromagnetic pump, a heat exchanger, an expansion joint and a cooling pipeline; an annular cavity is provided in the turbine casing, the cooling pipeline is mounted on the inner wall of the annular cavity and periodically and uniformly distributed along the circumferential direction of the turbine casing, and the cooling pipeline is filled with cooling liquid; a mounting cavity is further provided in the turbine casing, and the mounting cavity communicates with the annular cavity; the electromagnetic pump, the expansion joint and the heat exchanger are all mounted in the mounting cavity.

公开(公告)号：US20230243745A1

公开(公告)日：2023-08-03

申请号：US18131346

申请日：2023-04-05

申请人： Beihang University

发明人： Yanyu ZHAO ,  Yubo FAN

IPC分类号： G01N21/47

CPC分类号： G01N21/4795

摘要： A method for optical property measurement based on spatial frequency domain imaging, includes: obtaining a first target sinusoidal light pattern with a specified spatial frequency by modulating first light emitted by a light source in a spatial frequency domain, the number of coded bits of the first target sinusoidal light pattern is smaller than a preset number of bits; irradiating the first target sinusoidal light pattern to a surface of a sample to be detected; collecting light intensity distribution data of second light, the second light is formed after the first target sinusoidal light pattern is reflected by the sample to be detected; determining one or more optical property parameters of the sample to be detected according to the light intensity distribution data of the second light.

公开(公告)号：US20230210711A1

公开(公告)日：2023-07-06

申请号：US17908420

申请日：2021-07-08

申请人： BEIHANG UNIVERSITY ,  PEKING UNIVERSITY THIRD HOSPITAL (THE THIRD CLINICAL MEDICAL SCHOOL OF PEKING UNIVERSITY)

发明人： Dangxiao Wang ,  Qinggang Ge ,  Yan Zhang ,  Yuru Zhang ,  Zongyu Wang ,  Lei Xue

IPC分类号： A61H9/00

CPC分类号： A61H9/0057 ,  A61H9/0078 ,  A61H2230/405 ,  A61H2201/0107 ,  A61H2201/165 ,  A61H2205/083 ,  A61H2201/5007 ,  A61H2201/5056 ,  A61H2201/1238

摘要： The present disclosure relates to an exoskeleton robot for expectoration assistance and a control method. In the exoskeleton robot, a respiratory sensor acquires a respiratory signal of a user to be assisted; a positive pressure module covers an upper abdomen of the user to be assisted; a negative pressure module is arranged on an outer wall of a thoracic cavity of the user to be assisted and wraps the whole thoracic cavity, and a negative pressure cavity is formed between a housing of the negative pressure module and the outer wall of the thoracic cavity; in an inhalation state, the rigidity of the housing of the negative pressure module increases; in an exhalation state, the rigidity of the housing of the negative pressure module decreases; the control module is respectively connected with the respiratory sensor, the positive pressure module, and the negative pressure module.

公开(公告)号：US11668232B2

公开(公告)日：2023-06-06

申请号：US17613070

申请日：2021-04-16

申请人： BEIHANG UNIVERSITY

发明人： Chongwen Jiang ,  Siyuan Pi ,  Chenhao Xu ,  Zhihao Li ,  Zhenxun Gao ,  Chunxuan Li

IPC分类号： F02B55/08 ,  F02B53/00 ,  F02B53/10 ,  F02B53/12 ,  F02B55/02 ,  F02B55/14 ,  F02F11/00

CPC分类号： F02B55/08 ,  F02B53/00 ,  F02B53/10 ,  F02B53/12 ,  F02B55/02 ,  F02B55/14 ,  F02F11/007

摘要： An oblong-shaped rotor engine with improved high sealing performance includes an upper end cover, a lower end cover, a rotor, three combustion chambers, three isolation zones, a fuel spray ignition unit, a sealing pin row and an eccentric driving shaft, a sealing pin row, which seals the transition zone between different combustion cylinders, wherein the engine according to this invention can better avoid the effect of structural wear, effectively enhance the sealing performance between combustion chambers and abate gas leakage between cylinders, wherein the designed profile and sealing means can enlarge the design error margin for engines, abate the processing difficulty of engines, and effectively decrease the production costs of engines.

公开(公告)号：US11598915B2

公开(公告)日：2023-03-07

申请号：US17406945

申请日：2021-08-19

申请人： BEIHANG UNIVERSITY

发明人： Chunxi Zhang ,  Jingming Song ,  Ningfang Song ,  Zhiyu Guo ,  Zuchen Zhang ,  Yan Li

IPC分类号： G02B6/02 ,  G02B6/024

摘要： An anti-torsion solid-core polarization-maintaining photonic crystal fiber includes a cladding having an inner layer arranged around the core and an outer layer between the inner layer and the outer wall of the cladding. The inner layer has multi-layer air holes used to construct optical properties and two micron-size air holes arranged along the x-axis extending in the center producing form birefringence. The outer layer includes multi-layer air holes arranged radially along the y-axis. The size and arrangement of the multi-layer air holes in the outer layer cause the bending stiffness of the photonic crystal fiber along the x-axis to be different from that along the y-axis. While meeting the requirements of the optical properties of the fiber, the photonic crystal fiber possesses an anti-torsion ability due to the anisotropy of stress distribution in the radial direction, thereby reducing the non-reciprocal phase difference generated by the magneto-optic Faraday Effect.

公开(公告)号：US20230056370A1

公开(公告)日：2023-02-23

申请号：US17488164

申请日：2021-09-28

申请人： BEIHANG UNIVERSITY

发明人： Honghao SHI ,  Xin LIN ,  Jiawei JIANG ,  Lida GUO ,  Jingyuan WANG

IPC分类号： G16H50/80

摘要： A construction method of a fine-grained infectious disease simulation model is disclosed. The construction method includes: obtaining a population movement flow between multiple target regions within a predetermined time period; dividing the predetermined time period into multiple time periods based on a time mode; dividing the multiple target regions into multiple spatial nodes based on a spatial mode; and constructing a simulation model according to the population movement flow, the multiple time periods, and the multiple spatial nodes. By the method, the dynamic modeling of the development of infectious diseases is completed; the sub model modeling under different time modes is completed; and the fine-grained modeling under different spatial modes is completed.

公开(公告)号：US20230053410A1

公开(公告)日：2023-02-23

申请号：US17577223

申请日：2022-01-17

申请人： Beihang University

发明人： Yang GAO ,  Shiyu LIANG ,  Aimin HAO ,  Hongyu WU

IPC分类号： G06T15/50 ,  G06T15/30

摘要： The embodiments of the present disclosure disclose subsurface scattering calculation method for translucent material rendering, which relates to the clipping and polynomial fitting of brute-force Monte Carlo photon tracking experimental results to accurately represent the energy attenuation of subsurface scattering in distance. On this basis, an average free path and a single scattering rate are used to determine the relationship of each term in the multinomial fitting formula so as to facilitate the calculation and adjustment of the reflection profile. In the end, through a new real-time importance sampling solution, the outgoing radiation from any point on the object surface is calculated by the Monte Carlo method. This importance sampling solution is also applicable to any other subsurface scattering calculation model. By combining this subsurface scattering calculation result with other results, such as highlight reflection, any translucent material object can be rendered accurately and efficiently.

公开(公告)号：US20230048523A1

公开(公告)日：2023-02-16

申请号：US17793004

申请日：2020-06-23

申请人： BEIHANG UNIVERSITY

发明人： Dezhi ZHENG ,  Dapeng LI ,  Shuai WANG ,  Xianbin CAO

IPC分类号： G01W1/08 ,  G01W1/02 ,  B64C39/02

摘要： An atmospheric parameter measuring device includes a cone top, a balance rod an upper propeller, a lower propeller, a transmission module, an accelerating module, a DC generator, an object-carrying shell, an inertial generation module, a wireless energy-carrying communication module, a sensor carrier, a base, an airbag and a low-power-consumption sensor. Electric energy can generate by using four methods of wind energy, microwave, inertia and solar energy, so the energy supply for the carried low-power-consumption sensor can be ensured and the measuring device can generate electric energy at day and night to ensure the working state of the carried low-power-consumption sensor and measure the atmospheric temperature, humidity, wind speed, intensity of pressure and cloud and water grain shape parameters at the current position conveniently; the measuring device can float in the air by the lift force provided by the rotation of the two propellers.

公开(公告)号：US11579248B2

公开(公告)日：2023-02-14

申请号：US17092094

申请日：2020-11-06

申请人： BEIHANG UNIVERSITY

发明人： Xiangrong Wang ,  Huaiyuan Liang

IPC分类号： G01S7/41 ,  G01S13/02 ,  G01S13/44

摘要： The present application provides a method, apparatus and electronic equipment for recognizing a posture of a target, a first receiving signal and a second receiving signal upon scattering of a transmitting signal from a target to be recognized are acquired, a first baseband signal is determined according to the first receiving signal and the transmitting signal, and a second baseband signal is determined according to the second receiving signal and the transmitting signal; and a category of the posture of the target to be recognized is finally determined according to the first baseband signal and the second baseband signal. The first baseband signal and the second baseband signal carry various feature values related to the posture of the target, including but not limited to transversal velocity information and radial velocity information, etc.

公开(公告)号：US20230042786A1

公开(公告)日：2023-02-09

申请号：US17968880

申请日：2022-10-19

申请人： BEIHANG UNIVERSITY

发明人： Wuxiang ZHANG ,  Baowen ZHANG ,  Xilun DING

IPC分类号： B23P19/02

摘要： The present invention relates to a system and its control method for press-fit equipment for shaft-hole fit parts. The automatic press-fit control system mainly includes a control center, a loading and unloading control subsystem, a visual inspection subsystem, and a press-fit control subsystem, and each subsystem communicates with the control center through a communication interface. The control center automates the operation of each subsystem independently, such as the product loading and unloading process, the visual inspection process, and the press-fit process through the control center. The advantages of the invention are: it can realize automatic loading, inspection, and press-fit of the product, which greatly improves the level of production automation and production efficiency; the control system adopts modular design, and each subsystem can operate independently under the control of the control center; it adopts visual inspection and automatic compensation of angle deviation, with good fault tolerance.