公开(公告)号：US12174083B2

公开(公告)日：2024-12-24

申请号：US17812169

申请日：2022-07-12

Applicant: Tsinghua University

Inventor： Fei Guo ,  Yijie Huang ,  Chong Xiang ,  Ganlin Cheng ,  Shengshan Chen ,  Xiaohong Jia ,  Yuming Wang

IPC: G01M13/005 ,  G01M3/04

Abstract: An equipment for sealing-performance test includes a housing, a fixed mechanism and a detection part; the housing is configured to accommodate the fixed mechanism, and an abutting part is formed in the housing and is configured to abut against an outer side of a sealing ring; the fixed mechanism includes a central rod, a plurality of fixed blocks and a driving assembly, the central rod extends along a direction parallel to the axial direction of the central rod, the plurality of fixed blocks are evenly disposed along a circumferential direction of the central rod, and the driving assembly is configured to drive the plurality of fixed blocks to move along a radial direction of the central rod; a test cavity and a detection cavity are formed in the housing, the test cavity is filled with a test fluid, and is separated from the detection cavity by the sealing ring.

公开(公告)号：US20240422445A1

公开(公告)日：2024-12-19

申请号：US18460997

申请日：2023-09-05

Applicant: Tsinghua University

Inventor： Lu FANG ,  Tao YU

IPC: H04N23/957 ,  H04N23/661 ,  H04N23/90

Abstract: A system for intelligent sensing and computing of an immersive light field includes a mobile platform, a support, an acquisition array, a control system and a computing system. The control system and the acquisition array are fixed on the support that is in form of hemisphere. The support changes a pose through the mobile platform. The acquisition array includes acquisition cameras of multiple views that are uniformly distributed and fixed on the support, and lenses of the acquisition cameras point to outside from a sphere center and are configured to acquire video images at a plurality of pitch angles. The control system is connected to the acquisition array and configured to transmit the video images to a control device for data storage, and the computing system is configured to acquire the video images in the control device and generate an immersive light field video based on the video images.

公开(公告)号：US12155675B2

公开(公告)日：2024-11-26

申请号：US17551441

申请日：2021-12-15

Applicant: Tsinghua University

Inventor： Ke Xu ,  Fan Yang ,  Bo Wu ,  Qi Li ,  Jianping Wu

IPC: H04L9/40 ,  H04L45/00

Abstract: A verification method for fast source and path embedded with random authentication is provided. The method includes: generating a corresponding verification structure for an expected path according to a predetermined path strategy, embedding different m pieces of fragment information randomly selected with same possibility from the verification structure for the expected path to a header of a data packet to be transmitted in a data flow, and transmitting the data packet to be transmitted with the embedded fragment information to a next hop of routing node of the expected path, performing a verification on the received data packet by the respective intermediate routing node on the expected path, and forwarding the data packet to the next routing node when the verification passes, performing verification on the received data packet by the data flow destination, performing a parsing verification evaluation on the expected path when the verification passes.

公开(公告)号：US12149041B2

公开(公告)日：2024-11-19

申请号：US17304582

申请日：2021-06-23

Applicant: Tsinghua University

Inventor： Fang Liu ,  Yuechai Lin ,  Jinyu Li ,  Yidong Huang ,  Kaiyu Cui ,  Xue Feng ,  Wei Zhang

IPC: H01S3/0959 ,  G01N21/3581 ,  H01S5/12

Abstract: A terahertz radiator is based on coherent Smith-Purcell radiation amplified by stimulation. The terahertz radiator includes an electron emission source configured to emit electron beams and a pumping source configured to emit pumping signals. The pumping signal interacts with a primary grating structure to obtain preliminarily bunched electrons. The preliminarily bunched electrons interact with the primary grating structure to generate coherent Smith-Purcell radiation. The coherent Smith-Purcell radiation and the pumping signals vertically resonate in a primary resonant cavity structure, so that the electron bunching density is increased, and in turn, the coherent Smith-Purcell radiation is enhanced. A positive feedback process is formed by free electrons and the coherent Smith-Purcell radiation, and the coherent Smith-Purcell radiation amplified by stimulation and periodic bunched electron bunches are obtained. The terahertz radiator can be used to realize a stimulated amplification phenomenon under the conditions of small current and large beam spots.

公开(公告)号：US20240377553A1

公开(公告)日：2024-11-14

申请号：US18574638

申请日：2022-07-06

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Qingping HUANG ,  Yong ZHOU ,  Hui DING ,  Xin JIN ,  Chao JI

IPC: G01V5/226

Abstract: Provided are an inspection method, and an inspection system including: at least one ray source; a detector assembly and a conveying device. At least one ray source and the detector assembly may move in a traveling direction relative to the conveying device, so that the to-be-inspected object may enter an inspection region. When viewed along a central axis of the inspection region, at least one ray source may translate between scanning positions, and a translation distance of at least one ray source between two adjacent scanning positions is greater than a spacing between adjacent target spots of each ray source. When at least one ray source is located at one scanning position, at least one ray source and the detector assembly move in the traveling direction and at least one ray source emits X-rays. After moving a predetermined distance, at least one ray source translates to another scanning position.

公开(公告)号：US20240377254A1

公开(公告)日：2024-11-14

申请号：US18637217

申请日：2024-04-16

Applicant: Tsinghua University ,  HON HAI PRECISION INDUSTRY CO., LTD.

Inventor： LI-WEN LAI ,  PENG LIU ,  DUAN-LIANG ZHOU ,  QUN-QING LI ,  SHOU-SHAN FAN

IPC: G01J3/10 ,  G01N21/3504

Abstract: An electrically modulated light source comprises a carbon nanotube-graphene composite film structure, a first electrode and a second electrode. The carbon nanotube-graphene composite film structure comprises a carbon nanotube layer and a graphene layer stacked with each other. The first electrode and the second electrode electrically coupled with nanotube-graphene composite film structure. The first electrode and the second electrode are configured to apply a voltage to the carbon nanotube-graphene composite film structure.

公开(公告)号：US12114560B2

公开(公告)日：2024-10-08

申请号：US17505822

申请日：2021-10-20

Applicant: Tsinghua University ,  HON HAI PRECISION INDUSTRY CO., LTD.

Inventor： Gao-Tian Lu ,  Yang Wei ,  Shou-Shan Fan ,  Yue-Gang Zhang

IPC: H10K85/20 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/168

CPC classification number: H10K85/221 ,  C01B32/168 ,  B82Y30/00 ,  B82Y40/00 ,  C01P2004/13 ,  C01P2004/64 ,  C01P2006/40

Abstract: A carbon nanotube composite structure includes a carbon nanotube and a film-like structure. The carbon nanotube includes a p-type portion and an n-type portion. The film-like structure is a molybdenum disulfide film or a tungsten disulfide film, and the film-like structure covers the n-type portion.

公开(公告)号：US20240334585A1

公开(公告)日：2024-10-03

申请号：US18575277

申请日：2022-07-05

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Kejun KANG ,  Yaohong LIU ,  Huaibi CHEN ,  Liang ZHANG ,  Chuanxiang TANG ,  Yuanjing LI

IPC: H05H7/02 ,  H05G1/32 ,  H05H7/12

CPC classification number: H05H7/02 ,  H05G1/32 ,  H05H7/12 ,  H05H2007/027

Abstract: A ray generating device and a control method thereof are provided. The ray generating device includes: an electronic beam generating device; a microwave generating device; a microwave circulator, having a power input port and at least two power output ports, the power input port being connected to the microwave generating device; a plurality of accelerating tubes respectively connected to at least two power output ports, configured to respectively receive a plurality of electronic beams, and accelerate electronic beams respectively through microwaves received from the at least two power output ports, and to respectively generate a plurality of rays having at least two different energies; and a controller, configured to perform chronological control on microwave power of the microwave generating device, and chronological control on beam loadings of the electronic beams generated by the electronic beam generating device and respectively corresponding to accelerating tubes.

公开(公告)号：US12104996B2

公开(公告)日：2024-10-01

申请号：US17124500

申请日：2020-12-17

Applicant: TSINGHUA UNIVERSITY

Inventor： Qi-Kun Xue ,  Xiao-Peng Hu

IPC: G01N1/36 ,  B01L9/00 ,  B01L9/06

CPC classification number: G01N1/36 ,  B01L9/06 ,  B01L9/52

Abstract: A flat plate sample holder expansion structure used in a vacuum is configured to convey a flat plate sample holder in a vacuum environment, and detachably attached to a flat plate sample holder tray through an adapter. A receiving space for receiving the flat plate sample holder is provided between the adapter and the flat plate sample holder tray. The flat plate sample holder is detachably arranged in the receiving space. A cylindrical sample holder gripper is detachably connected to the adapter. The cylindrical sample holder gripper conveys the flat plate sample holder and samples thereon into a low-temperature, high-intensity magnetic field apparatus, thereby realizing an objective of replacing samples in the vacuum environment. A vacuum test platform is built by combining the apparatuses using the two types of sample holders.

公开(公告)号：US12078400B2

公开(公告)日：2024-09-03

申请号：US17412620

申请日：2021-08-26

Applicant: Tsinghua University

Inventor： Haishan Cao

IPC: F25B9/02

CPC classification number: F25B9/02 ,  F25B2309/022

Abstract: A miniature Joule-Thomson cryocooler operating at liquid helium temperatures includes an integral structure formed by welding at least three base plates sequentially superposed, an outermost base plate in the at least three base plates is configured as a cover plate and configured to seal the rest of the at least three base plates, the rest of the at least three base plates is configured as a first-stage cooling circulator, a second-stage cooling circulator and a third-stage cooling circulator respectively, the first-stage cooling circulator, the second-stage cooling circulator and the third-stage cooling circulator have a first-stage working fluid, a second-stage working fluid and a third-stage working fluid respectively, the first-stage cooling circulator is configured to precool the second-stage working fluid and the third-stage working fluid through the first-stage working fluid, and the second-stage cooling circulator is configured to precool the third-stage working fluid through the second-stage working fluid.