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：US10939892B2

公开(公告)日：2021-03-09

申请号：US15827708

申请日：2017-11-30

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Guoping Zhu ,  Qitian Miao ,  Junli Li ,  Xiaoli Zhang

IPC: A61B6/03 ,  G21K1/02 ,  G02B27/30 ,  A61B6/00 ,  G01N23/046 ,  G21K1/12

Abstract: There are disclosed a collimator, a radiation emitting assembly and an inspection apparatus. The collimator is configured to collimate radiation from a radiation emitter. One of the collimator and the radiation emitter is provided with a protrusion portion and the other is provided with a recess portion such that the protrusion portion is capable of being placed within the recess portion and the radiation emitter and the collimator are allowed to be arranged close to and connected with each other, and that the radiation passes through passages in the protrusion portion and the recess portion from the radiation emitter to the collimator.

公开(公告)号：US10446288B2

公开(公告)日：2019-10-15

申请号：US15578138

申请日：2016-07-12

Applicant: Nuctech Company Limited ,  Nuctech Jiangsu Company Limited

Inventor： Zhiqiang Chen ,  Yuanjing Li ,  Ziran Zhao ,  Wanlong Wu ,  Junli Li ,  Ming Ruan ,  Guangwei Ding

IPC: G21K1/02 ,  G01N23/223 ,  H05G1/02 ,  G21F3/00

Abstract: The present invention provides a ray beam guiding device for guiding a ray beam in a ray inspection apparatus. The ray beam guiding device is provided in a housing of the ray inspection apparatus, and two ends of the ray beam guiding device are connected to a front collimator and a rear collimator, respectively. The ray beam guiding device comprises a plurality of guiding walls and a guiding cavity surrounded by the guiding walls. The guiding wall is formed of a first material which is capable of absorbing rays or the first material is coated on an inside of the guiding wall, and the guiding cavity has a central axis extending in a direction from the rear collimator to the front collimator, and the ray beam guiding device further comprises at least one fin plate provided in the guiding cavity of the ray beam guiding device. The at least one fin plate is configured for blocking and/or absorbing scattered rays.

公开(公告)号：US20180308602A1

公开(公告)日：2018-10-25

申请号：US15578138

申请日：2016-07-12

Applicant: Nuctech Company Limited ,  Nuctech Jiangsu Company Limited

Inventor： Zhiqiang Chen ,  Yuanjing Li ,  Ziran Zhao ,  Wanlong Wu ,  Junli Li ,  Ming Ruan ,  Guangwei Ding

IPC: G21K1/02

CPC classification number: G21K1/025 ,  G21F3/00 ,  H05G1/02

Abstract: The present invention provides a ray beam guiding device for guiding a ray beam in a ray inspection apparatus. The ray beam guiding device is provided in a housing of the ray inspection apparatus, and two ends of the ray beam guiding device are connected to a front collimator and a rear collimator, respectively. The ray beam guiding device comprises a plurality of guiding walls and a guiding cavity surrounded by the guiding walls. The guiding wall is formed of a first material which is capable of absorbing rays or the first material is coated on an inside of the guiding wall, and the guiding cavity has a central axis extending in a direction from the rear collimator to the front collimator, and the ray beam guiding device further comprises at least one fin plate provided in the guiding cavity of the ray beam guiding device. The at least one fin plate is configured for blocking and/or absorbing scattered rays.

公开(公告)号：US10031261B2

公开(公告)日：2018-07-24

申请号：US14975387

申请日：2015-12-18

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Yanli Deng ,  Qitian Miao ,  Junli Li ,  Guoping Zhu ,  Weiqiang Guan ,  Yuxin Hu ,  Shenjin Ming ,  Ming Huang

IPC: G01D18/00 ,  G01V13/00 ,  G01N23/083

Abstract: The disclosure provides a method for measuring X-ray energy of an accelerator in an inspection system. the method comprises: building a database comprising correspondence between half-value layer (HVL) and energy under a predetermined condition; measuring HVL for X-rays of the accelerator in the inspection system on line under the same predetermined condition; and comparing the measured HVL with the HVLs in the database comprising correspondence between HVL and energy to determine the X-ray energy of the accelerator. The method is applicable to a large-scale container/vehicle inspection system for measurement of X-ray energy/HVL of the accelerator so as to acquire source state of the inspection system in real time.

公开(公告)号：US12282126B2

公开(公告)日：2025-04-22

申请号：US18146101

申请日：2022-12-23

Applicant: NUCTECH COMPANY LIMITED

Inventor： Jianmin Li ,  Guoping Zhu ,  Ming Ruan ,  Kun Zhao ,  Yanli Deng ,  Junli Li ,  Qitian Miao

IPC: G01T1/20

Abstract: Provided is a device of detecting a ray dose adaptable for coupling with a terminal, including: a housing, a scintillator and a light shielding layer. The housing has an accommodating space and a window, the accommodating space is in communication with the window; the scintillator is configured to receive a ray and convert a received ray into a visible light, the scintillator is located in the accommodating space, the scintillator covers the window, an outer surface of the scintillator includes a first outer surface and a second outer surface, and the first outer surface is adapted to a camera of the terminal; and the light shielding layer is configured to shield a visible light in an external environment from illuminating on the scintillator, the light shielding layer is arranged on the second outer surface of the scintillator.

公开(公告)号：US20180160997A1

公开(公告)日：2018-06-14

申请号：US15827708

申请日：2017-11-30

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Guoping Zhu ,  Qitian Miao ,  Junli Li ,  Xiaoli Zhang

IPC: A61B6/00 ,  A61B6/03 ,  G02B27/30 ,  G21K1/02 ,  G21K1/12 ,  G01N23/046

CPC classification number: A61B6/583 ,  A61B6/03 ,  G01N23/046 ,  G02B27/30 ,  G21K1/02 ,  G21K1/025 ,  G21K1/12

Abstract: There are disclosed a collimator, a radiation emitting assembly and an inspection apparatus. The collimator is configured to collimate radiation from a radiation emitter. One of the collimator and the radiation emitter is provided with a protrusion portion and the other is provided with a recess portion such that the protrusion portion is capable of being placed within the recess portion and the radiation emitter and the collimator are allowed to be arranged close to and connected with each other, and that the radiation passes through passages in the protrusion portion and the recess portion from the radiation emitter to the collimator.

公开(公告)号：US09823382B2

公开(公告)日：2017-11-21

申请号：US14965122

申请日：2015-12-10

Applicant: Nuctech Company Limited

Inventor： Jianmin Li ,  Yulan Li ,  Jingyu Gu ,  Yuanjing Li ,  Quanwei Song ,  Weizhen Wang ,  Dongyu Wang ,  Zhiqiang Chen ,  Chaunxiang Tang ,  Yinong Liu ,  Junli Li ,  Tao Xue ,  Hui Gong ,  Xuewu Wang

IPC: G01N23/02 ,  G01K1/04 ,  G01V5/00 ,  B60R11/00

CPC classification number: G01V5/0016 ,  B60R11/00 ,  B60R2011/004

Abstract: A vehicle mounted mobile container or vehicle inspection system, including: a radiation source, a movable vehicle for carrying the inspection system, and a detector arm rack which has a horizontal arm and a vertical arm, a first end of the horizontal arm is connected to the vehicle and a second end thereof is connected to an end of the vertical arm. The horizontal arm and the vertical arm are connected by a pivotal connecting device such that the vertical arm may pivot in a vertical plane, and the horizontal arm and the vertical arm may be retracted in a same horizontal plane. The novel arm rack construction may reduce the space occupied by it on top of the scanning vehicle after the arm rack is stowed so as to reduce the eight of the scanning vehicle under running condition.

公开(公告)号：US09685247B2

公开(公告)日：2017-06-20

申请号：US14459408

申请日：2014-08-14

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Kejun Kang ,  Yuanjing Li ,  Ying Li ,  Jianmin Li ,  Junli Li ,  Yanli Deng

IPC: G21F3/00 ,  G01V5/00 ,  G21F1/02 ,  G21F1/04

CPC classification number: G21F3/00 ,  G01V5/0016 ,  G21F1/023 ,  G21F1/042

Abstract: A radiation protection device is disclosed in the embodiment of the present invention. The radiation protection device is used for a system which is configured to perform safety inspection of a cargo or a vehicle by a ray. The radiation protection device comprising: at least one container, and a radiation protection part disposed within the container. The radiation protection material may comprise at least one of concrete, sandstone, and water, or the radiation protection part may comprise a steel-lead protection wall or a concrete protection wall. With the radiation protection device according to the embodiment of the present invention, after the container is transported to the site, it can be directly put in place to be capable of shielding rays without needing operation or with only simple operation. The amount of on-site work, construction time, and construction cost are low.

公开(公告)号：US20180156741A1

公开(公告)日：2018-06-07

申请号：US15716921

申请日：2017-09-27

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Kejun Kang ,  Jianping Cheng ,  Zhiqiang Chen ,  Ziran Zhao ,  Junli Li ,  Xuewu Wang ,  Zhi Zeng ,  Ming Zeng ,  Yi Wang ,  Qingjun Zhang ,  Jianping Gu ,  Xi Yi ,  Bicheng Liu ,  Guangming Xu ,  Yongqiang Wang

IPC: G01N23/04 ,  G01N23/08 ,  G01N23/20

CPC classification number: G01N23/04 ,  G01N23/046 ,  G01N23/06 ,  G01N23/20008 ,  G01N2223/304 ,  G01N2223/33 ,  G01N2223/401 ,  G01N2223/419 ,  G01N2223/652 ,  G01V5/0016 ,  G01V5/0025 ,  G01V5/0091

Abstract: Inspection devices and inspection methods are disclosed. The inspection method includes: performing X-ray scanning on an object being inspected so as to generate an image of the object being inspected; dividing the image of the object being inspected to determine at least one region of interest; detecting interaction between a cosmic ray and the region of interest to obtain a detection value; calculating a scattering characteristic value and/or an absorption characteristic value of the cosmic ray in the region of interest based on size information of the region of interest and the detection value; and discriminating a material attribute of the region of interest by means of the scattering characteristic value and/or the absorption characteristic value. With the above technical solutions, inspection accuracy and inspection efficiency may be improved.