公开(公告)号：US12103092B2

公开(公告)日：2024-10-01

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: B24B5/18 ,  B23B5/18 ,  B23P25/00 ,  B24B1/04 ,  C21D10/00

CPC classification number: B23B5/18 ,  B24B1/04

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.

公开(公告)号：US20240310229A1

公开(公告)日：2024-09-19

申请号：US18473832

申请日：2023-09-25

Applicant: BEIJING INSTITUTE OF TECHNOLOGY

Inventor： Jianwei LI ,  Zhonghao TIAN ,  Xuechao WANG ,  Rongxue KANG ,  Hangyu ZHOU ,  Bo DENG

IPC: G01M3/04

CPC classification number: G01M3/04

Abstract: A method and system for predicting a diffusion range of a hazardous gas, an electronic device and a storage medium are provided. The method includes: gridding a space area of a public scene to obtain a gridded space; performing leakage source analysis according to the gridded space to determine a leakage feature; determining a hazardous gas prediction manner according to the leakage feature and an early warning condition, where the hazardous gas prediction manner includes a hazardous gas existence mode and a protective gas coexistence mode; determining a diffusion circle coverage according to the hazardous gas prediction manner and a wall barrier action; determining a hazardous gas concentration in grids covered by a diffusion circle according to the diffusion circle coverage; and determining a hazardous gas distribution according to the hazardous gas concentration, a leakage outlet and a ventilation opening.

公开(公告)号：US12018930B2

公开(公告)日：2024-06-25

申请号：US17617315

申请日：2021-02-08

Applicant: Beijing Institute of Technology

Inventor： Qun Hao ,  Yao Hu ,  Zhen Wang ,  Shaopu Wang

IPC: G01B11/24 ,  G02B5/30 ,  G02B27/28

CPC classification number: G01B11/2441 ,  G02B5/3025 ,  G02B27/283

Abstract: A transient digital moire phase-shifting interferometric measuring device and method for a surface shape of an optical element solves a defect that an instantaneous vibration resistance needs to be sacrificed for a measurement range when using a two-step carrier splicing method, and expands the measurement range of a digital moire phase-shifting method while retaining instantaneous anti vibration characteristics of the digital moire phase-shifting method. The transient digital moire phase-shifting interferometric measuring device includes a light source, a beam splitter, a reference lens, a first polarization grating, a measured lens, a second polarization grating, a first imaging objective lens, a first camera, a second imaging objective lens and a second camera. Different carriers are loaded through a spectral performance of a polarization grating, and the polarization grating is used to separate two beams of an interference light, and two actual interference patterns are obtained at a same time.

公开(公告)号：US11967716B2

公开(公告)日：2024-04-23

申请号：US17584732

申请日：2022-01-26

Applicant: BEIJING INSTITUTE OF TECHNOLOGY

Inventor： Ziqiang Shao ,  Shuai Jia ,  Jie Wei ,  Zhen Huang ,  Baixue Gong

IPC: H01M4/58 ,  C01G53/11 ,  H01M4/02

CPC classification number: H01M4/5815 ,  C01G53/11 ,  C01P2002/72 ,  C01P2002/85 ,  C01P2004/03 ,  C01P2004/04 ,  C01P2004/34 ,  C01P2006/40 ,  H01M2004/021

Abstract: Disclosed is a hollow sulfide microsphere with enriched sulfur vacancies, which is prepared by a method comprising the steps of: dissolving cobalt nitrate and nickel nitrate in a mixed solution of N, N-dimethylformamide and acetone with an equal volume; then adding a chelating agent thereto, subjecting a resulting mixture to a solvothermal reaction to obtain a coordination polymer microsphere; dissolving the coordination polymer microsphere and a sulfurization agent in an organic solvent, and reacting to obtain a hollow sulfide microsphere; and subjecting the hollow sulfide microsphere to reduction treatment with sodium borohydride, centrifuging, washing and drying to obtain the hollow sulfide microsphere with enriched sulfur vacancies having a particle size of 1-2.5 μm, a shell thickness of 15-30 nm and a specific capacity of the material of 763.4 C g−1 (current density is 1 A g−1).

公开(公告)号：US11897344B2

公开(公告)日：2024-02-13

申请号：US18212143

申请日：2023-06-20

Applicant: BEIJING INSTITUTE OF TECHNOLOGY

Inventor： Jianwei Li ,  Zhonghao Tian ,  Xinming Wan ,  Hongwen He ,  Fengchun Sun ,  Wenjun Guo ,  Zhanxin Mao

IPC: F02C9/46 ,  B60L3/04

CPC classification number: B60L3/04

Abstract: The present disclosure relates to a risk early warning method and system for hydrogen leakage, and relates to the field of hydrogen leakage. The method includes: obtaining ventilation information of a hydrogen-related area; carrying out grid division on a pipeline system of the hydrogen-related area to obtain a gridded pipeline system; determining a risk coefficient corresponding to each grid of the gridded pipeline system according to leakage sources of the pipeline system; determining a high-risk region by means of a jet cone model according to the risk coefficients; determining a medium-risk region, a low-risk region and a safe region according to the risk coefficients and the ventilation information; and carrying out risk early warning according to the high-risk region, the medium-risk region, the low-risk region and the safe region.

公开(公告)号：US11870335B2

公开(公告)日：2024-01-09

申请号：US17910683

申请日：2021-04-16

Applicant: Beijing Institute of Technology

Inventor： Junjun Deng ,  Zhenpo Wang ,  Na Fu ,  Shuo Wang

IPC: H02M1/08 ,  H02J50/12 ,  H02M3/335 ,  H02M1/00

CPC classification number: H02M1/083 ,  H02J50/12 ,  H02M1/0058 ,  H02M3/33573 ,  H02J2207/20

Abstract: A wireless power transfer (WPT) system regulation method and system for implementing zero voltage switching (ZVS) in a wide power range are provided. The method includes: determining, according to a topology structure of a WPT system and based on a linear state equation, a phase -shift angle boundary and a switching frequency boundary of an inverter that meet ZVS; fixing a switching frequency at a resonance frequency of the WPT system, and determining, in a phase -shift manner, a phase-shift range and a corresponding first voltage output range for implementing ZVS; determining a frequency variation range of a frequency modulation method; determining an optimal switching frequency based on corresponding switching frequencies and phase-shift angles that meet ZVS at different expected output voltages of the WPT system; determining a second voltage output range for implementing ZVS at the optimal switching frequency; and regulating the WPT system by using different regulation methods.

公开(公告)号：US11852451B2

公开(公告)日：2023-12-26

申请号：US18081657

申请日：2022-12-14

Applicant: BEIJING INSTITUTE OF TECHNOLOGY

Inventor： Guangyan Huang ,  Xiaobing Bian ,  Li Liu ,  Fenglei Huang ,  Qingbo Guo ,  Wei Li

IPC: F42D5/045 ,  F42B33/06

CPC classification number: F42B33/062

Abstract: Disclosed are a protection equipment, system and method for the destruction of explosives. The protection equipment for the destruction of explosives includes four modules: an inner fence, an outer fence, an anti-leakage fence and a top cover. The modular equipment takes an overall nonmetal flexible composite structure, and the individual modules are light in weight and convenient to operate. It can be operated by two persons or a single person. A protective effect can be achieved during destruction of explosives by using the protection equipment, and even if the explosives explode during destruction, it will not cause injury to surrounding personnel. A protection system for explosive destruction based on the protection equipment can be used to destroy unexploded bomb or explosives under protective conditions, thereby achieving rapid emergency disposal without making contact with the explosives.

公开(公告)号：US11835407B2

公开(公告)日：2023-12-05

申请号：US17377162

申请日：2021-07-15

Applicant: BEIJING INSTITUTE OF TECHNOLOGY

Inventor： Chunguang Xu ,  Shuangyi Li ,  Yuren Lu ,  Peng Yin ,  Dezhi Li ,  Wenyuan Song

IPC: G01N29/14 ,  G01L1/25 ,  G01N29/24

CPC classification number: G01L1/255 ,  G01N29/14 ,  G01N29/24 ,  G01N2291/101

Abstract: A device and a method for ultrasonic detecting a mechanical member based on magnetic fluid coupling. The device comprises a magnetic field generating apparatus, magnetic fluid and an ultrasonic probe. The magnetic field generating apparatus has a cylindrical structure, into which the magnetic fluid is injected, where an upper portion of the apparatus is provided with the ultrasonic probe a front end that vertically extends into a liquid level of the magnetic fluid, and a bottom portion of the apparatus covers a detected position of a member under detection. The magnetic fluid at least contains magnetic suspension particles and oil-based or water-based liquid. With the device and the method, the ultrasonic probe is coupled with the member under detection to realize ultrasonic detecting of the service stress of the member under detection.

公开(公告)号：US11817287B1

公开(公告)日：2023-11-14

申请号：US18316257

申请日：2023-05-12

Applicant: Beijing Institute of Technology

Inventor： Li Xi ,  Kaiyuan Xue ,  Daining Fang

IPC: H01J35/10 ,  H01J35/06 ,  H01J35/20 ,  H01J35/14

CPC classification number: H01J35/101 ,  H01J35/066 ,  H01J35/106 ,  H01J35/147 ,  H01J35/20 ,  H01J2235/1026 ,  H01J2235/1275

Abstract: A rotary-transmission-target microfocus X-ray source and an X-ray generation method based on the rotary-transmission-target microfocus X-ray source are provided. The X-ray source comprises a chamber, and an electron beam system is installed in the chamber. The electron beam system is arranged on a same side as an anode target rotating shaft. A motor in a rotary anode target system drives an anode target to rotate through a bevel gear transmission device. The microstructure of a target is designed. An electron beam emitted by the electron beam system vertically bombards the metal target of the rotating anode target. A cooling system is configured to cool the anode target.

公开(公告)号：US11795990B2

公开(公告)日：2023-10-24

申请号：US17586503

申请日：2022-01-27

Applicant: Beijing Institute of Technology

Inventor： Xiaoyu Ding ,  Jianhua Liu ,  Hao Gong

IPC: F16B39/30

CPC classification number: F16B39/30

Abstract: The present disclosure provides an anti-loosening screw pair and an anti-loosening screw component. The screw pair includes a first screw component provided with a first screw thread and a second screw component whose outer wall surface is provided with a second screw thread. The first and second screw components are in threaded connection. In a direction of the first screw component being screwed into the second screw component, sides of the first and second screw threads pressing against each other are formed into force-bearing fitting faces respectively, and opposite sides thereof are formed into non-force-bearing fitting regions respectively. At least one of the force-bearing fitting faces and the non-force-bearing fitting regions of the first and the second screw components is provided with a stopper so as to prevent radial displacement between the first and the second screw components.