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：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：US20160170074A1

公开(公告)日：2016-06-16

申请号：US14965978

申请日：2015-12-11

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Jianmin LI ,  Yulan LI ,  Yuanjing LI ,  Hao YU ,  Chunguang ZONG ,  Jingyu GU ,  Weifeng YU ,  Quanwei SONG ,  Weizhen WANG ,  Shangmin SUN ,  Yinong LIU ,  Junli LI ,  Chuanxiang TANG

IPC: G01V5/00 ,  G21K1/02

CPC classification number: G01V5/0016 ,  G01V5/0008 ,  G21K1/02

Abstract: The present disclosure discloses an alignment system and an alignment method for a container or vehicle inspection system, and an inspection system. The inspection system comprises comprising an ray source, a collimator, a detector arm and a detector module mounted on a detector arm, the ray source, the collimator and the detector module are arranged to form an inspection passage, a ray beam emitted from the ray source passes through collimator and irradiates onto an inspected object, and an attenuated ray beam is collected by the detector module so as to complete inspection. The alignment system comprises a measuring module arranged to receive the ray beam emitted from the collimator and to measure the ray beam so as to determine positions and orientations of the ray source and the collimator. With the alignment method, alignment between a center point of the ray source, a central line of a detector tip and a central line of the collimator may be more accurately measured.

Abstract translation: 本公开公开了一种用于集装箱或车辆检查系统的对准系统和对准方法以及检查系统。 检查系统包括一个安装在检测器臂上的射线源，准直仪，检测器臂和检测器模块，射线源，准直器和检测器模块被布置成形成检查通道，从射线射出的射线束 源通过准直仪并照射到检查对象上，并且由检测器模块收集衰减的射线束，以便完成检查。 对准系统包括测量模块，其布置成接收从准直仪发射的射线束并测量射线束，以便确定射线源和准直器的位置和取向。 利用对准方法，可以更准确地测量射线源的中心点，检测器尖端的中心线与准直仪的中心线之间的对准。

公开(公告)号：US20220099601A1

公开(公告)日：2022-03-31

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: G01N23/10 ,  G01N23/04 ,  G01N23/083

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：US20220084336A1

公开(公告)日：2022-03-17

申请号：US17421709

申请日：2020-01-23

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

Inventor： Yongming WANG ,  Junjie TU ,  Chuan GAO ,  Yanwei XU ,  Weifeng YU ,  Chunguang ZONG ,  Yu HU

IPC: G07C5/08 ,  B60W40/10

Abstract: This disclosure provides a vehicle inspection method, apparatus, system, and computer-readable storage medium and relates to the field of security inspection technologies. The vehicle inspection method of the present disclosure includes: acquiring vehicle profile information of a vehicle through a first sensor that performs measurement in a direction perpendicular to a passage, and determining a feature point of the vehicle according to the vehicle profile information; determining a position of the vehicle in the passage through a second sensor that performs measurement in a direction along the passage, and determining a position of the feature point according to the position of the vehicle in the passage; and switching an operating mode of a ray source based on a preset strategy according to a position relation between the position of the feature point and the ray source.

公开(公告)号：US20190204240A1

公开(公告)日：2019-07-04

申请号：US16231373

申请日：2018-12-21

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Ke LI ,  Jianmin LI ,  Weifeng YU ,  Yulan LI ,  Xuejing YANG ,  Yuanjing LI ,  Chunguang ZONG ,  Zhiqiang CHEN ,  Li ZHANG

IPC: G01N23/04

CPC classification number: G01N23/04 ,  G01N2223/04 ,  G01N2223/303 ,  G01N2223/33 ,  G01N2223/401

Abstract: The present disclosure provides a scanned image correction apparatus, method and a mobile scanning device. The apparatus includes an image collector, an arm swing detector, and an image processor. The image collector is configured to collect a scanned image of an object under inspection during a scanning process of scanning the object under inspection by the mobile scanning device, and determine an image parameter of the scanned image. The arm swing detector is disposed at a monitor point on a detector arm of the mobile scanning device, and configured to detect a displacement offset of the detector arm in a specified direction and build an arm swing model of the detector arm. The image processor is configured to determine a change relationship between the image parameter of the scanned image and the displacement offset of the detector arm, and correct the scanned image based on the change relationship.

公开(公告)号：US20160054470A1

公开(公告)日：2016-02-25

申请号：US14582097

申请日：2014-12-23

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Yu HU ,  Jianmin LI ,  Hui MENG ,  Yuan MA ,  Weifeng YU ,  Jinning LIANG ,  Shangmin SUN

IPC: G01V5/00 ,  B65G15/58 ,  B65G15/24 ,  B65G35/00 ,  F16M13/02

CPC classification number: G01V5/0016 ,  B65G15/44 ,  B65G17/08 ,  B65G47/66 ,  F16M13/02

Abstract: The present invention discloses a vehicle inspection system, comprising: an inspection passage; a vehicle dragging system arranged in the inspection passage, wherein the vehicle dragging system comprises a first dragging means and a second dragging means, which are sequentially arranged along a vehicle dragging direction, and in the vehicle dragging direction, the first dragging means is arranged at the upstream of the second dragging means, and a separating section is arranged between the first dragging means and the second dragging means, so that the first dragging means and the second dragging means are separated by a preset distance in the vehicle dragging direction; and a radiographic inspection system, wherein at least a part of paths of the beams of the radiographic inspection system passes through the separating section between the first dragging means and the second dragging means.

Abstract translation: 本发明公开了一种车辆检查系统，包括：检查通道; 布置在所述检查通道中的车辆牵引系统，其中所述车辆牵引系统包括沿着车辆拖动方向依次布置的第一牵引装置和第二牵引装置，并且在所述车辆拖动方向上，所述第一牵引装置布置在 第二牵引装置的上游和第一牵引装置和第二牵引装置之间设置分离部分，使得第一牵引装置和第二牵引装置在车辆拖动方向上分开预定的距离; 以及射线照相检查系统，其中所述射线照相检查系统的光束的至少一部分路径通过所述第一拖动装置和所述第二拖动装置之间的分离部分。

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.