公开(公告)号：US20210270991A1

公开(公告)日：2021-09-02

申请号：US17255394

申请日：2020-01-06

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

Inventor： Yanwei XU ,  Weifeng YU ,  Yu HU ,  Chunguang ZONG ,  Shangmin SUN

IPC: G01V5/00 ,  G01S17/894 ,  G06K9/78

Abstract: The present disclosure relates to a security scanning inspection system and method. The security scanning inspection system comprises a detector, a scanning device and a controller, wherein the detector is configured to detect a protective attribute of an object to be inspected; the scanning device is movably arranged and the scanning device is configured to emit a scanning ray during movement to perform a security scanning inspection on the object to be inspected, the scanning device comprising at least two working modes, wherein a dose of a scanning ray in each working mode is different from a dose of a scanning ray in any other working modes; and the controller configured to select a working mode of the scanning device according to the protective attribute of the object to be inspected detected by the detector.

公开(公告)号：US20190204243A1

公开(公告)日：2019-07-04

申请号：US16234625

申请日：2018-12-28

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Kejun KANG ,  Jianmin LI ,  Xiulin NI ,  Yulan LI ,  Yuanjing LI ,  Zhiqiang CHEN ,  Li ZHANG ,  Liang LI ,  Xiang ZOU ,  Weifeng YU ,  Hejun ZHOU ,  Chunguang ZONG

IPC: G01N23/046

CPC classification number: G01N23/046 ,  G01N2223/33 ,  G01V5/005

Abstract: The present disclosure relates to the technical field of CT detection, and in particular to a CT inspection system and a CT imaging method. The CT inspection system provided by the present disclosure comprises a radioactive source device, a detection device, a rotation monitoring device and an imaging device, wherein the detection device obtains detection data at a frequency that is N times a beam emitting frequency of the radioactive source device; the rotation monitoring device detects a rotation angle of the detection device and transmits a signal to the imaging device each time the detection device rotates by a preset angle; the imaging device determines a rotational position of the detection device each time the radioactive source device emits a beam according to the signal transmitted by the rotation monitoring device and the detection data of the detection device.

公开(公告)号：US20170186172A1

公开(公告)日：2017-06-29

申请号：US15280113

申请日：2016-09-29

Applicant: Nuctech Company Limited

Inventor： Yanwei XU ,  Weifeng YU

IPC: G06T7/00 ,  G06K9/00

CPC classification number: G06K9/00624 ,  G06K9/44 ,  G06K2209/01 ,  G06K2209/19 ,  G06T5/006 ,  H04N1/00442 ,  H04N19/23

Abstract: The present disclosure provides a method and system for identifying a train number and train type. The method includes: continuously photographing a train under inspection by using a linear-array camera in motion relative to the train under inspection, and generating a plurality of partial images of the train; splicing the plurality of partial images of the train; correcting distortion of the spliced image; identifying a train number from the corrected image; wherein the correcting distortion of the spliced image includes: extracting a contour of a wheel from the spliced image; obtaining a ratio between a horizontal diameter and a vertical diameter of the wheel from the contour; if the ratio is greater than a first preset threshold, horizontally compressing the spliced image according to the ratio; and if the ratio is smaller than a second preset threshold, horizontally stretching the spliced image.

公开(公告)号：US20250035569A1

公开(公告)日：2025-01-30

申请号：US18715229

申请日：2022-12-26

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

Inventor： Yuanjing LI ,  Shangmin SUN ,  Chunguang ZONG ,  Tao SONG ,  Lei LIU ,  Yuan MA ,  Weifeng YU ,  Bicheng LIU

IPC: G01N23/10 ,  G01N23/04 ,  G01N23/083 ,  G01P3/64

Abstract: A security inspection device, a security inspection system and a security inspection method are provided, the device includes: a support frame defining an inspection channel; a first X-ray accelerator provided at a position of a top portion of the support frame and the position is offset from a centerline of the inspection channel, where the first X-ray accelerator is configured to radiate a first X-ray towards the inspection channel to inspect an object; a second X-ray accelerator configured to radiate a second X-ray to the inspection channel to inspect the object; and a detector apparatus, including: detector modules provided on the support frame and facing the first X-ray accelerator and the second X-ray accelerator, the detector modules receive the first X-ray and/or the second X-ray to form a transmission image of the object; the first X-ray, the second X-ray, and the detector modules are located in the same plane.

公开(公告)号：US20240411045A1

公开(公告)日：2024-12-12

申请号：US18716943

申请日：2022-12-16

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

Inventor： Shangmin SUN ,  Chunguang ZONG ,  Xuejing YANG ,  Xuping FAN ,  Quanwei SONG ,  Junping SHI ,  Hui MENG ,  Yang YANG ,  Weifeng YU ,  Ying LI ,  Dongyu WANG ,  Lei LIU ,  Bicheng LIU ,  Haojie CHI

IPC: G01V5/22 ,  G01N23/04

Abstract: A mobile radiation inspection apparatus includes a vehicle body, a traveling mechanism, a boom assembly, a first imaging device, and a second imaging device. The boom assembly is mounted on the vehicle body and is configured to switch between an inspection state and a transportation state. The first imaging device includes a first ray source and a first ray detector both mounted on the boom assembly. The first ray source is positioned at the top of an inspection channel. The second imaging device includes a second ray source and a second ray detector. The second ray detector cooperates with the second ray source to detect rays emitted by the second ray source, and the second ray source is positioned on a side surface of the inspection channel. The mobile radiation inspection apparatus implements multi-angle and multi-mode scanning.

公开(公告)号：US20170237949A1

公开(公告)日：2017-08-17

申请号：US15300737

申请日：2015-11-06

Applicant: NUCTECH COMPANY LIMITED

Inventor： Yongming WANG ,  Yanwei XU ,  Weifeng YU

IPC: H04N7/18 ,  G06K9/32 ,  H04N5/247

CPC classification number: H04N7/188 ,  G06K7/00 ,  G06K9/209 ,  G06K9/3258 ,  G06K2209/01 ,  G06K2209/19 ,  H04N5/247 ,  H04N7/181

Abstract: The present disclosure provides a method of identifying a container number, including: arranging an image acquiring device along a passageway through which a container will pass, the image acquiring device comprising a trigger unit and a plurality of image acquiring units, at least two image acquiring units of the plurality of image acquiring units being adapted to respectively acquire images of the container numbers on at least two surfaces of a plurality of surfaces of the container passing through the passageway; acquiring the images of the container numbers on the at least two surfaces respectively by the at least two image acquiring units based on a signal from the trigger unit; and identifying the container number at least based on the images or data from the at least two image acquiring units about the container number. The present disclosure also relates to a system of identifying a container number.

公开(公告)号：US20170160168A1

公开(公告)日：2017-06-08

申请号：US15278435

申请日：2016-09-28

Applicant: Nuctech Company Limited

Inventor： Yanwei XU ,  Weifeng YU

IPC: G01M17/007 ,  G01N23/04 ,  G01B11/04

CPC classification number: G01M17/007 ,  G01B11/04 ,  G01N23/04 ,  G01N2223/03 ,  G01N2223/05 ,  G01N2223/631 ,  G01V5/0016 ,  G01V5/0066

Abstract: A method and a system for fast inspecting a vehicle based on a length measuring device, including: when a subject vehicle enters an inspection region, measuring a first length and a second length of the subject vehicle; determining whether the first length and the second length is respectively larger than or equal to a preset second length threshold; if so, determining whether a gap portion of the subject vehicle between a first portion and a second portion of the subject vehicle appears in a beam emitting region formed by a beam of radiation rays emitted by the system for fast inspecting a vehicle; and when the gap portion appears in the beam emitting region, emitting a beam of radiation rays of a first radiation dose to the subject vehicle according to the gap portion, wherein the subject vehicle moves with respect to the system for fast inspecting a vehicle.

公开(公告)号：US20210354738A1

公开(公告)日：2021-11-18

申请号：US17287116

申请日：2019-10-08

Applicant: NUCTECH COMPANY LIMITED

Inventor： Yanwei XU ,  Weifeng YU ,  Yu HU ,  Shangmin SUN

IPC: B61L27/00

Abstract: The present disclosure relates to a train identification system and method, and a train safety inspection system and method. The train identification system includes: a remote detection component, configured to acquire overall feature information of an inspected train through remote monitoring; and an identification device, configured to determine at least one of a type and a traveling situation of the inspected train according to the acquired overall feature information.

公开(公告)号：US20190204242A1

公开(公告)日：2019-07-04

申请号：US16234621

申请日：2018-12-28

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Xiulin NI ,  Jianmin LI ,  Haitian TAN ,  Yulan LI ,  Weifeng YU ,  Yuanjing LI ,  Hejun ZHOU ,  Zhiqiang CHEN ,  Chunguang ZONG ,  Li ZHANG

IPC: G01N23/046 ,  G01V5/00

CPC classification number: G01N23/046 ,  G01N2223/401 ,  G01V5/005

Abstract: The present disclosure relates to the technical field of CT detection, in particular to a CT inspection system and a CT imaging method. The CT inspection system provided by the present disclosure includes a scanning device and an imaging device, wherein the scanning device having a radioactive source device and a detection device is configured to rotate at a non-uniform speed in at least partial process of scanning an object to be detected; and the imaging device generates a CT image based on effective detection data, wherein the effective detection data refer to data acquired each time the detection device rotates by a preset angle. In the present disclosure, the imaging device of the CT inspection system generates a CT image based on data acquired each time the detection device rotates by a preset angle, which, compared with traditional image collection solutions, can effectively reduce image deformation and improve accuracy of detection results.

公开(公告)号：US20160135278A1

公开(公告)日：2016-05-12

申请号：US14900601

申请日：2013-11-19

Applicant: NUCTECH COMPANY LIMITED

Inventor： Shangmin SUN ,  Zhanfeng QIN ,  Sheng YAO ,  Weifeng YU ,  Liwei SONG ,  Chunguang ZONG ,  Jinning LIANG

IPC: H05H7/02 ,  G01V5/00 ,  H05H9/04

CPC classification number: H05H7/02 ,  G01V5/0016 ,  H05H9/048 ,  H05H2007/027

Abstract: The present invention provides a standing wave electron linear accelerator comprising a modulator and a magnetron for producing radio frequency microwaves; a plurality of accelerating tubes for accelerating electrons; a microwave transmission system for feeding the microwaves into the plurality of accelerating tubes; a plurality of electron guns for emitting electron beams into the plurality of accelerating tubes; a plurality of targets impinged by the electrons from a plurality of accelerating tubes to form continuous spectrums of X-rays; a plurality of shielding devices for shielding the continuous spectrums of X-rays generated by the targets; and a microwave distributor disposed adjacent to the end of the microwave transmission system, wherein the microwave distributor has a microwave inlet and a plurality of microwave outlets for distributing the microwaves in the microwave transmission system into the accelerating tubes.

Abstract translation: 本发明提供了一种驻波电子线性加速器，其包括用于产生射频微波的调制器和磁控管; 用于加速电子的多个加速管; 微波传输系统，用于将微波馈送到多个加速管中; 多个电子枪，用于将电子束发射到多个加速管中; 由多个加速管撞击的电子的多个靶，以形成X射线的连续光谱; 多个屏蔽装置，用于屏蔽目标产生的X射线的连续光谱; 以及布置在所述微波传输系统的端部附近的微波分配器，其中所述微波分配器具有微波入口和用于将所述微波传输系统中的微波分配到所述加速管中的多个微波出口。