公开(公告)号：EP4369286A1

公开(公告)日：2024-05-15

申请号：EP22836831.2

申请日：2022-07-01

Applicant: Nuctech Company Limited ,  Nuctech Jiangsu Company Limited ,  Tsinghua University

Inventor： CHEN, Zhiqiang ,  ZHANG, Li ,  TANG, Hu ,  SUN, Yunda ,  LI, Dong ,  YAN, Dan

IPC: G06T5/00

CPC classification number: G06T7/13 ,  G06T7/136 ,  G06T5/94 ,  G06T2207/2019220130101 ,  G06T2207/3011220130101 ,  G06T2207/1002420130101 ,  G06T2207/1004820130101 ,  G06T5/50

Abstract: The present disclosure provides for an apparatus and a method for eliminating a shadow, and an apparatus and a method for identifying an empty tray. The apparatus for eliminating a shadow includes: an image acquiring module configured to acquire an image with supplementary lighting and an image without supplementary lighting; an illumination area image acquiring module configured to obtain an illumination area image based on a difference between the image with supplementary lighting and the image without supplementary lighting; an edge detecting module configured to perform an edge detection on the image without supplementary lighting to obtain an edge image; and a shadow line eliminating module configured to eliminate a part corresponding to the illumination area image from the edge image to obtain an actual edge image.

公开(公告)号：EP3372991A1

公开(公告)日：2018-09-12

申请号：EP16861236.4

申请日：2016-05-19

Applicant: Nuctech Company Limited ,  Nuctech Jiangsu Company Limited

Inventor： CHEN, Zhiqiang ,  WU, Wanlong ,  ZHAO, Ziran ,  DING, Guangwei ,  RUAN, Ming ,  LUO, Xilei

IPC: G01N23/02

CPC classification number: G01N23/083 ,  G01N23/02 ,  G01N2223/316

Abstract: Embodiments of the present disclosure provide a collimating device and a ray inspection device. The collimating device comprises: a beam guiding cylinder, a first collimator mounted at an inlet end of the beam guiding cylinder; a second collimator mounted an outlet end of the beam guiding cylinder; a beam guiding cylinder adjusting device disposed adjacent to the inlet of the beam guiding cylinder to adjust a direction of the beam guiding cylinder such that the first collimator is aligned with the first direction. The outlet end of the beam guiding cylinder is fixed to the frame and the second collimator is aligned with an object to be irradiated by a radiation beam, and the beam guiding cylinder is configured to have flexibility to allow the adjusting device to adjust a direction towards which the inlet end of the beam guiding cylinder is directed, in a direction transverse to the first direction. Collimation adjustment can be achieved only by adjusting the first collimator

公开(公告)号：EP4369291A1

公开(公告)日：2024-05-15

申请号：EP22836832.0

申请日：2022-07-01

Applicant: Nuctech Company Limited ,  Nuctech Jiangsu Company Limited ,  Tsinghua University

Inventor： CHEN, Zhiqiang ,  ZHANG, Li ,  TANG, Hu ,  SUN, Yunda ,  LI, Dong ,  YAN, Dan

IPC: G06T7/00

CPC classification number: G06V20/60 ,  G06T5/30 ,  G06T7/181 ,  G06V10/44 ,  G06V10/75 ,  G06T7/13 ,  G06V10/28 ,  G06T7/00

Abstract: Provided in the present application are an apparatus and method for identifying an empty tray. The apparatus for identifying an empty tray comprises: an image acquisition module, which acquires an image of a tray, which tray is provided with an interference medium at the bottom thereof; an edge detection module, which performs edge detection on a tray bottom region in the image, so as to obtain an edge image; a template matching module, which matches the edge image with an interference medium image template; a corresponding-region elimination module, which eliminates, from the edge image, edge points corresponding to the interference medium image template, so as to obtain the remaining edge points; and an empty-tray determination module, which determines, on the basis of the remaining edge points, whether the tray is empty.edge detection on

公开(公告)号：EP3373307A2

公开(公告)日：2018-09-12

申请号：EP16861327.1

申请日：2016-07-12

Applicant: Nuctech Company Limited ,  Nuctech Jiangsu Company Limited

Inventor： CHEN, Zhiqiang ,  LI, Yuanjing ,  ZHAO, Ziran ,  WU, Wanlong ,  LI, Junli ,  RUAN, Ming ,  DING, Guangwei

IPC: G21K1/02 ,  G21K1/10 ,  G01N23/02 ,  G01V5/00

CPC classification number: G21K1/025

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：EP4413925A1

公开(公告)日：2024-08-14

申请号：EP22877900.5

申请日：2022-09-29

Applicant: Nuctech Company Limited

Inventor： ZHANG, Li ,  CHEN, Zhiqiang ,  CHANG, Ming ,  JIN, Xin ,  HUANG, Qingping ,  HONG, Mingzhi ,  ZHANG, Liguo

IPC: A61B6/00

CPC classification number: A61B6/00 ,  G01N23/046

Abstract: A CT imaging system (1000) is provided, including: a scanning channel (200) disposed in a first direction; a radiation source component (10) disposed on one side of the scanning channel (200), wherein the radiation source component (10) is used to emit radiation beams; a detector component (20) disposed on another side of the scanning channel (200), wherein the detector component (20) is disposed opposite to the radiation source component (10) and used to receive the radiation beams, and the radiation beams forms an imaging region between the radiation source component (10) and the detector component (20), wherein the detector component (20) includes at least two detection regions (21) and at least one blank region (22), the imaging region has a central cross-section of the radiation beams (31) extending through the radiation source component (10), and a position of the detection region (21) and a position of the blank region (22) are complementary with respect to the central cross-section of the radiation beams (31). The CT imaging system (1000) may obtain missing data through algorithm compensation, by means of rotational scanning and based on data symmetry, so as to obtain complete projection data to restore image information of an object to be inspected (100).

公开(公告)号：EP4369057A1

公开(公告)日：2024-05-15

申请号：EP22836956.7

申请日：2022-07-06

Applicant: Tsinghua University ,  Nuctech Company Limited

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

IPC: G01V5/00

Abstract: An inspection system, including: a ray source (100) rotatable between at least two scanning positions around a rotation axis, where a rotation angle of the ray source (100) between two adjacent scanning positions is greater than an angle of adjacent target spots of the ray source (100) relative to the rotation axis; a detector assembly (200); and a conveying device (300) for carrying an object to be inspected (10). The ray source (100) and the detector assembly (200) are movable in a traveling direction relative to the conveying device (300) so that the object to be inspected (10) enters an inspection region. When the ray source (100) is located at one of the plurality of scanning positions, the ray source (100) and the detector assembly (200) move in the traveling direction relative to the conveying device (300) and the ray source (100) emits X-rays; and when the ray source (100) and the detector assembly (200) move a predetermined distance in the traveling direction relative to the conveying device (300), the ray source (100) rotates around the rotation axis to another one of the plurality of scanning positions.

公开(公告)号：EP4369055A1

公开(公告)日：2024-05-15

申请号：EP22836830.4

申请日：2022-07-01

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： CHEN, Zhiqiang ,  ZHANG, Li ,  HUANG, Qingping ,  JIN, Xin ,  DING, Hui ,  ZHOU, Yong ,  HU, Baoyuan ,  ZHAO, Zhenhua

IPC: G01V5/00

Abstract: A ray scanning device, comprising: a conveying apparatus (1), conveying an object to be detected (6) to pass through a scanning region of the ray scanning device; a ray source (3), comprising multiple ray source modules (31, 32, 33, 34), each ray source module (31, 32, 33, 34) comprising at least one ray source point emitting a ray beam, and the multiple ray source modules (31, 32, 33, 34) being arranged around the scanning region above the conveying device (1) and secured in a plane perpendicular to a conveying direction of the object to be detected (6); and a detector (4), used to detect rays transmitted through the object to be detected (6) during a scanning period, and comprising multiple detector sets (41, 42, 43, 44), end portions of the multiple detector sets (41, 42, 43, 44) being connected to each other so as to surround the scanning region, and the multiple detector sets (41, 42, 43, 44) being secured in a plane perpendicular to the conveying direction of the object to be detected (6), the detector (4) being located between the ray source (3) and the scanning region along a direction perpendicular to the conveying direction of the object to be detected (6), the ray source (3) and the detectors (4) being arranged to at least partially overlap along the conveying direction of the object to be detected (6), and the multiple ray source modules (31, 32, 33, 34) being detached and mounted independently of each other.

公开(公告)号：EP4345509A1

公开(公告)日：2024-04-03

申请号：EP22836960.9

申请日：2022-07-06

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： ZHANG, Li ,  CHEN, Zhiqiang ,  HUANG, Qingping ,  DING, Hui ,  ZHOU, Yong ,  JIN, Xin ,  YAO, Liming

IPC: G01V5/00

Abstract: An inspection system, including: a carrying device (300), at least one ray source (100), where each ray source (100) includes a separate housing (110) to define a vacuum space and a plurality of target spots (120) enclosed within the housing (110); and a detector assembly (200). The at least one ray source (100) and the detector assembly (200) are lifted or lowered along a central axis of the carrying device (300) relative to the carrying device (300). When viewed along the central axis, the at least one ray source (100) is translatable between a plurality of scanning positions relative to the carrying device (300). When the at least one ray source (100) is at one of the scanning positions relative to the carrying device (300), the at least one ray source (100) and the detector assembly (200) are lifted or lowered relative to the carrying device (300) along the central axis, and the at least one ray source (100) emits X-rays; and when the at least one ray source (100) and the detector assembly (200) are lifted or lowered a predetermined distance relative to the carrying device, the at least one ray source (100) translates to another one of the scanning positions relative to the carrying device (300).

公开(公告)号：EP4257520A1

公开(公告)日：2023-10-11

申请号：EP21899895.3

申请日：2021-11-22

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： ZHANG, Li ,  CHEN, Zhiqiang ,  LI, Yuanjing ,  HUANG, Qingping ,  GUO, Weijun ,  YAO, Liming ,  DING, Hui ,  LIU, Junhao ,  ZHOU, Jiajia

IPC: B65G37/00 ,  G01N23/04

Abstract: A conveying device (100) and an inspection system (1000) are provided. The conveying device includes: a first support frame (1); a first conveying mechanism (2) and a second conveying mechanism (3) which are installed on the first support frame; and a switching mechanism (4) configured to selectively lift the first conveying mechanism or the second conveying mechanism in a vertical direction, such that the first conveying mechanism or the second conveying mechanism carries goods (401) and conveys the goods in a first horizontal direction or a second horizontal direction different from the first horizontal direction. The conveying device may achieve a positioning and a smooth continuous conveying of goods, and achieve a smooth conveying and a calibrated positioning of the goods in different postures.

公开(公告)号：EP4187286A1

公开(公告)日：2023-05-31

申请号：EP21846235.6

申请日：2021-06-15

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： CHEN, Zhiqiang ,  ZHANG, Li ,  HUANG, Qingping ,  LIANG, Jinning ,  HONG, Mingzhi ,  CHENG, Yi

IPC: G01V5/00 ,  G01V8/00 ,  G01N23/04 ,  G01N23/046

Abstract: A vehicle-mounted CT security inspection system is provided, including: a van truck (100) and a CT security inspection apparatus (200), wherein the CT security inspection apparatus (200) is arranged inside a van body (110) of the van truck (100), the CT security inspection apparatus (200) includes a CT scanner (210), an inlet transmitting mechanism (220) and an outlet transmitting mechanism (230), the CT scanner (210) is configured to detect an article and output a detection result, a longitudinal side wall (120) of the van body (110) has a side opening (121), a tail side wall (130) of the van body (110) has a tail opening (131), and the inlet transmitting mechanism (220) and the outlet transmitting mechanism (230) are respectively in communication with the tail opening (131) and the side opening (121) so as to receive an article to be detected and output a detected article. In the vehicle-mounted CT security inspection system, the CT security inspection technology is used, and multi-dimensional information such as the density and the effective atomic number of the detected object is acquired and used, so that the detection and the alarm of various drugs/explosives inside the luggage may be achieved, providing a higher detection ability and a lower false alarm rate. The vehicle-mounted type provides the security inspection system of the present disclosure with advantages such as mobile flexibility, short arrangement time and the like.