公开(公告)号：US11798188B2

公开(公告)日：2023-10-24

申请号：US17622496

申请日：2021-02-24

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Zhiqiang Chen ,  Yuanjing Li ,  Jianmin Li ,  Xianghao Wu ,  Bin Liu ,  Guocheng An

IPC: G06V40/18 ,  G06T7/62 ,  G06T7/90 ,  G06T7/70 ,  G06V40/16 ,  G06T7/00

CPC classification number: G06T7/62 ,  G06T7/0012 ,  G06T7/70 ,  G06T7/90 ,  G06V40/162 ,  G06V40/18 ,  G06V40/193 ,  G06T2207/30041

Abstract: The present disclosure provides a method of remotely measuring a size of a pupil, including: acquiring an image of a to-be-measured person by using a detection device; acquiring an image of a pupil of the to-be-measured person from the image of the to-be-measured person; measuring a distance between the to-be-measured person and the detection device by using the detection device; and calculating an actual size of the pupil of the to-be-measured person based on the measured distance and the image of the pupil of the to-be-measured person. The present disclosure further provides an apparatus for remotely measuring a size of a pupil, an electronic device, and a non-transitory computer-readable medium.

公开(公告)号：US11619599B2

公开(公告)日：2023-04-04

申请号：US16935415

申请日：2020-07-22

Applicant: Tsinghua University ,  NUCTECH COMPANY LIMITED

Inventor： Zhi Zeng ,  Xingyu Pan ,  Xuewu Wang ,  Junli Li ,  Ming Zeng ,  Jianmin Li ,  Ziran Zhao ,  Jianping Cheng ,  Hao Ma ,  Hui Zhang ,  Hao Yu ,  Bicheng Liu

IPC: G01N23/201 ,  G01N23/02 ,  G06K9/62

Abstract: The present disclosure provides a substance identification device and a substance identification method. The substance identification device comprises: a classifier establishing unit configured to establish a classifier based on scattering density values reconstructed for a plurality of known sample materials, wherein the classifier comprises a plurality of feature regions corresponding to a plurality of characteristic parameters for the plurality of known sample materials, respectively; and an identification unit for a material to be tested, configured to match the characteristic parameter of the material to be tested with the classifier, and to identify a type of the material to be tested by obtaining a feature region corresponding to the characteristic parameter of the material to be tested.

公开(公告)号：US11104309B2

公开(公告)日：2021-08-31

申请号：US16233398

申请日：2018-12-27

Applicant: TSINGHUA UNIVERSITY ,  Nuctech Company Limited

Inventor： Yuan He ,  Jianmin Li ,  Hongqi Li ,  Yulan Li ,  Qiangqiang Wang ,  Yuanjing Li ,  Zhiqiang Chen ,  Li Zhang

IPC: B60S13/00 ,  B60S5/00 ,  B66F7/18 ,  B66F7/28 ,  B66F5/04 ,  B66F7/14 ,  B62D49/06 ,  B62D49/02

Abstract: A fork-arm lift tractor includes a vehicle body, a supporting plate disposed above the vehicle body, a lifting device for driving the supporting plate to be lifted, a front and rear fork-arm assemblies, a front and rear fork-arm drive assemblies. The front fork-arm assembly includes two front fork-arms rotatably disposed at the supporting plate. The rear fork-arm assembly includes two rear fork-arms rotatably disposed at the supporting plate, and the front and rear fork-arms may be deployed or retracted from both sides of the supporting plate. The front fork-arm driving assembly includes a front transmission part, and a front power device disposed at the supporting plate and may drive the front transmission part to move horizontally linearly so as to rotate the two front fork-arms. The rear fork-arm driving assembly has almost the same structure of the front fork-arm driving assembly and is used to rotate the two rear fork-arms.

公开(公告)号：US10996369B2

公开(公告)日：2021-05-04

申请号：US16234632

申请日：2018-12-28

Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Hao Yu ,  Ying Li ,  Weizhen Wang ,  Quanwei Song ,  Dongyu Wang ,  Haojie Chi ,  Jianmin Li ,  Yulan Li ,  Chunguang Zong ,  Zhiqiang Chen ,  Yuanjing Li ,  Li Zhang

IPC: G01N23/203 ,  G01V5/00

Abstract: The present disclosure discloses a vehicle-mounted type back scattering inspection system. The vehicle-mounted type back scattering inspection system includes a carriage and a back scattering imaging device, the scanning range of the back scattering imaging device is variable. As the scanning range of the back scattering imaging device of the present disclosure is variably set, the inspection range of the back scattering imaging device can be expanded.

公开(公告)号：US10782246B2

公开(公告)日：2020-09-22

申请号：US15827739

申请日：2017-11-30

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Chunguang Zong ,  Ying Li ,  Hejun Zhou ,  Quanwei Song ,  Jianmin Li ,  Yulan Li ,  Yuanjing Li ,  Li Zhang ,  Zhiqiang Chen

IPC: G01N23/04 ,  G01N21/90 ,  G01V5/00 ,  G01N21/01

Abstract: A movable ray inspection system used to be mounted in a container yard to inspect an object within a container is provided. The movable ray inspection system includes: a ray generator device configured to emit a ray, a ray receiving device configured to receive the ray, and at least one chamber for receiving the ray generator device and the ray receiving device therein. Each of the at least one chamber is configured to be a standard container or a chamber which has a same shape, a same size and a same structure as a standard container such that the movable ray inspection system is adapted to be stacked in the container yard.

公开(公告)号：US20200025968A1

公开(公告)日：2020-01-23

申请号：US16232058

申请日：2018-12-26

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Yigang YANG ,  Dongyu Wang ,  Hao Yu ,  Quanwei Song ,  Jianmin Li ,  Weizhen Wang ,  Yulan Li ,  Chunguang Zong ,  Qinjian Zhang ,  Ming Zeng ,  Zhiqiang Chen ,  Yuanjing Li ,  Li Zhang

IPC: G01V5/00 ,  G01N23/20

Abstract: The present disclosure discloses a radiation inspection system and a radiation inspection method. The radiation inspection system comprises a radiation source and a beam modulating device. The beam modulating device comprises a first collimating structure disposed at a beam exit side of the radiation source and a second collimating structure disposed at a beam exit side of the first collimating structure. The second collimating structure is movable relative to the first collimating structure to change a relative position of the first collimating port of the first collimating structure with the second collimating port of the second collimating structure, and the beam modulating device is shifted between a first operational state in which the beam modulating device modulates an initial beam into a fan beam, and a second operational state in which the beam modulating device modulates the initial beam into a pencil beam variable in position.

公开(公告)号：US10162077B2

公开(公告)日：2018-12-25

申请号：US15030511

申请日：2015-07-24

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Jianmin Li ,  Lei Zeng ,  Qiang Li ,  Wen Wei

IPC: G06K9/62 ,  G01V5/00 ,  G01N23/04 ,  G06K7/10 ,  G06K9/00

Abstract: A method for inspecting a vehicle includes acquiring a unique identity number of an insepected vehicle, carrying out X-ray scanning on the inspected vehicle to acquire an X-ray image of the inspected vehicle, retrieving at least one historical inspected image related to the unique identity number from a historical inspection database, determining, based on one template image selection algorithm selected from multiple template image selection algorithms, one of the at least one historical inspected images as a template image, determining a difference region between the X-ray image and the template image, and presenting the difference region to a user.

公开(公告)号：US09632041B2

公开(公告)日：2017-04-25

申请号：US14494301

申请日：2014-09-23

Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

Inventor： Mingliang Li ,  Zhiqiang Chen ,  Yuanjing Li ,  Jianmin Li ,  Li Zhang

IPC: A61B6/02 ,  G01N23/04 ,  A61B6/03 ,  G21K1/02 ,  G01T1/29 ,  A61B6/06

CPC classification number: G01N23/046 ,  A61B6/032 ,  A61B6/035 ,  A61B6/06 ,  G01N2223/3301 ,  G01T1/2985 ,  G21K1/025

Abstract: A straight trajectory CT device can be used in radiation imaging. The device includes: a ray-generating unit that generates a ray within a specific range of field angle; a channel for an object to be inspected though which the object to be inspected passes; a first collimator; and a ray receiving unit provided on both sides of the channel for the object to be inspected. The ray beam is received by the ray receiving unit after penetrating the first collimator and the object to be inspected in order. The ray generating unit is static and the first collimator moves in the same direction as the ray receiving unit. This direction is parallel to the channel for the object to be inspected. The device can complete computed tomography with a minimum of one ray receiving unit, thereby simplifying the structure of the device and reducing its cost.

公开(公告)号：US11822043B2

公开(公告)日：2023-11-21

申请号：US17420681

申请日：2020-01-03

Applicant: NUCTECH (BEIJING) COMPANY LIMITED ,  NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Zhiqiang Chen ,  Yuanjing Li ,  Li Zhang ,  Jianmin Li ,  Shangmin Sun ,  Chunguang Zong ,  Yu Hu ,  Quanwei Song ,  Hejun Zhou ,  Weifeng Yu ,  Jinguo Cao ,  Bing Fu

IPC: G01N23/04 ,  G01N23/083 ,  G01N23/087 ,  G01N23/10 ,  G01V5/00 ,  G01N23/18

CPC classification number: G01V5/0066 ,  G01N23/04 ,  G01N23/083 ,  G01N23/087 ,  G01N23/10 ,  G01N23/18 ,  G01V5/0008 ,  G01V5/0016 ,  G01V5/0041 ,  G01N2223/04 ,  G01N2223/3303 ,  G01N2223/40 ,  G01N2223/639

Abstract: The present disclosure provides a radiation inspection apparatus and a radiation inspection method. The radiation inspection apparatus includes: a radiation inspection device comprising a ray source and a detector that cooperates with the ray source to perform scanning inspection on an object to be inspected, the radiation inspection device having an inspection channel for the object to be inspected to pass through when scanning inspection is performed thereon; and traveling wheels provided at the bottom of the radiation inspection device to enable the radiation inspection apparatus to travel in an extension direction of the inspection channel, and the traveling wheels are configured to rotate 90° to enable the radiation inspection apparatus to travel in a direction perpendicular to the extension direction of the inspection channel.

公开(公告)号：US11474051B2

公开(公告)日：2022-10-18

申请号：US16626572

申请日：2019-05-29

Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Yigang Yang ,  Xuewu Wang ,  Zhi Zhang ,  Yuanjing Li ,  Jianmin Li

IPC: G01N23/09 ,  G01N23/02 ,  G01N23/05 ,  G01N23/083

Abstract: The present disclosure provides a dual mode detection method, controller and system, which relates to the technical field of radiation detection. The dual mode detection method of the present disclosure includes: determining a ratio of neutron to X-ray differential cross sections of an inspected object, according to X-ray object detection data, X-ray object-free detection data, neutron object detection data, and neutron object-free detection data; determining a substance type of the inspected object according to a correspondence between the ratio of neutron to X-ray differential cross sections of the inspected object and the substance type.