公开(公告)号：US20240085349A1

公开(公告)日：2024-03-14

申请号：US18259772

申请日：2021-12-15

Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Zhiqiang CHEN ,  Lei LIU ,  Shangmin SUN ,  Chunguang ZONG ,  Yu HU ,  Yuan MA ,  Zheng JI

IPC: G01N23/04 ,  G01N23/10 ,  G01V5/00

CPC classification number: G01N23/04 ,  G01N23/10 ,  G01V5/0016

Abstract: The present disclosure provides a radiation inspection system, including a container respectively provided with an entrance and an exit on opposite side walls thereof; and a radiation scanning imaging device disposed in the container and having an inspection channel. The radiation scanning imaging device includes a ray source, the ray source includes ray generators, and ray generators are configured to emit ray beams at different angles, so that the radiation scanning imaging device performs radiation scanning inspection on an object to be inspected passing through the inspection channel from the entrance to the exit.

公开(公告)号：US20230288350A1

公开(公告)日：2023-09-14

申请号：US18013555

申请日：2021-07-02

Applicant: NUCTECH COMPANY LIMITED

Inventor： Zhiqiang CHEN ,  Yuanjing LI ,  Shangmin SUN ,  Chunguang ZONG ,  Yu HU ,  Huaping TANG ,  Bicheng LIU ,  Weizhen WANG

IPC: G01N23/203

CPC classification number: G01N23/203 ,  G01N2223/316 ,  G01N2223/3301 ,  G01N2223/501

Abstract: The present invention relates to a backscatter imaging device, a control method and an inspection system. The backscatter imaging device includes a ray source assembly configured to emit rays to a scanning area; a backscatter detector array including a plurality of backscattering detectors and configured to receive scattered photons when the rays are backscattered by an object within the scanning area; and a first collimator assembly including a plurality of first collimating channels corresponding to the plurality of backscatter detectors respectively, arranged on one side of the backscatter detector array adjacent to the scanning area, and configured to align the scattered photons when the rays are backscattered by the object, and the plurality of backscatter detectors receive scattered photons corresponding to a plurality of depths in the object respectively; and at least part of the plurality of first collimation channels have an adjustable collimation angle.

公开(公告)号：US20230236093A1

公开(公告)日：2023-07-27

申请号：US18001249

申请日：2021-06-07

Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Qingjun ZHANG ,  Yuanjing LI ,  Zhiqiang CHEN ,  Jianmin LI ,  Weiping ZHU ,  Ge LI ,  Nei YANG ,  Biao CAO ,  Wei WANG ,  Xiulin NI ,  Shengxi LIU ,  Zheng LIANG

IPC: G01N1/22 ,  G01N1/24 ,  G01N30/20 ,  B25J9/16

CPC classification number: G01N1/2211 ,  G01N1/24 ,  G01N30/20 ,  B25J9/1697 ,  G01N2030/201 ,  G01N30/7206

Abstract: Provided are an odor sniffing device (11) and a vehicle-mounted security inspection apparatus for a container (1). The odor sniffing device (11) includes a primary sampling front end (116), which has a vent adapter (116-1) having a shape matching with a vent of the ventilator of the container, so that when the primary sampling front end (116) fits with the ventilator, the vent adapter (116-1) and the vent generally cooperate to achieve fluid communication. The vehicle-mounted security inspection apparatus (1) may perform imaging inspection and chemical inspection simultaneously.

公开(公告)号：US20230206414A1

公开(公告)日：2023-06-29

申请号：US17928166

申请日：2021-05-24

Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Yuanjing LI ,  Yuxiang XING ,  Jie SHI

IPC: G06T7/00 ,  G06T7/33 ,  G06T1/00 ,  G06T1/20

CPC classification number: G06T7/0002 ,  G06T7/33 ,  G06T7/97 ,  G06T1/0007 ,  G06T1/20 ,  G06T2207/10116 ,  G06T2207/20084 ,  G06T2207/30248

Abstract: A method of inspecting a vehicle includes: acquiring a to-be-inspected image of an inspected vehicle (S11); acquiring a visual feature of the to-be-inspected image using a first neural network model (S12); retrieving a template image from a vehicle template library based on the visual feature of the to-be-inspected image (S13); determining a variation region between the to-be-inspected image and the template image (S14); and presenting the variation region to a user (S15). The system of inspecting a vehicle includes a radiation imaging device (150), a display device (130), an image processor (140), and a storage device (120). The present disclosure further includes a computer-readable storage medium.

公开(公告)号：US20230124325A1

公开(公告)日：2023-04-20

申请号：US17967039

申请日：2022-10-17

Applicant: TSINGHUA UNIVERSITY ,  Nuctech Company Limited

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Xin JIN ,  Hongkai YANG ,  Xiaofei XU ,  Zhenhua ZHAO ,  Siyuan ZHANG ,  Changyu CHEN

IPC: G06T7/00 ,  G06V10/25 ,  A61B6/02 ,  A61B6/03 ,  A61B6/00

Abstract: The present disclosure relates to an imaging system and method for radiographic inspection. The imaging system for radiographic inspection includes an inspection area including an imaging area; a first ray source assembly, all the first targets of which are arranged in a first ray source plane; a first detector assembly, the plurality of first detector units of which are arranged in a detector plane, the detector plane and the first ray source plane are spaced apart from each other in a travelling direction of the object under inspection with a predetermined distance; and a ray source control device, configured such that when the region of interest of the object under inspection is at least partially located in the imaging area, the first ray source assembly emits X-rays simultaneously from at least two first targets to the imaging area at the same time.

公开(公告)号：US20220304574A1

公开(公告)日：2022-09-29

申请号：US17286573

申请日：2021-02-24

Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

Inventor： Zhiqiang CHEN ,  Yuanjing LI ,  Xianghao WU ,  Haitao ZHANG ,  Jundi DAI ,  Shaozhi ZHAO ,  Guocheng AN

IPC: A61B3/11 ,  A61B3/14

Abstract: The present disclosure provides a method of determining a distance and a height, including: measuring, a first distance, a second distance and a third distance from the security inspection device to the tested person as well as measuring a first height, a second height and a third height of the tested person; determining, a relationship between the first distance and a minimum distance threshold as well as a maximum distance threshold, a relationship between the second distance and the minimum distance threshold as well as the maximum distance threshold, and a relationship between the third distance and the minimum distance threshold as well as the maximum distance threshold; determining, a final distance from the security inspection device to the tested person and a final height of the tested person; and performing a pixel conversion and a size conversion on the pupil image of the tested person

公开(公告)号：US20220245807A1

公开(公告)日：2022-08-04

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

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：US20210394366A1

公开(公告)日：2021-12-23

申请号：US17354056

申请日：2021-06-22

Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

Inventor： Zhiqiang CHEN ,  Ziran ZHAO ,  Yan YOU ,  Yuanjing LI ,  Shixin ZHANG ,  Huan XIE ,  Xuming MA ,  Rui FAN ,  Yinglei WANG

IPC: B25J9/16 ,  G06T7/70 ,  G06T7/50 ,  G06K9/20 ,  H04N5/232 ,  H04N5/247 ,  H01Q13/02 ,  H01Q21/06 ,  G01S13/89 ,  G01S13/88

Abstract: A terahertz security inspection robot is provided, including: a housing including a main housing and a head housing rotatably connected to the main housing; a terahertz wave imaging mechanism including a mirror assembly arranged in the head housing and a detector array arranged in the main housing; and a rotating mechanism configured to cause the head housing and the mirror assembly located in the head housing to rotate with respect to the main housing, so that the mirror assembly of the terahertz wave imaging mechanism is oriented in different directions to respectively perform terahertz scanning and imaging on objects to be inspected in different inspection regions in a security inspection scene.

公开(公告)号：US20210364455A1

公开(公告)日：2021-11-25

申请号：US17255968

申请日：2020-01-03

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

Inventor： Jianmin LI ,  Li ZHANG ,  Yuanjing LI ,  Zhiqiang CHEN ,  Hao YU ,  Shangmin SUN ,  Bicheng LIU ,  Weizhen WANG ,  Dongyu WANG ,  Yuan MA ,  Yu HU ,  Chunguang ZONG

IPC: G01N23/20008 ,  G01N23/203

Abstract: The present disclosure provides a back scattering inspection system and a back scattering inspection method. The back scattering inspection system includes a frame and a back scattering inspection device. The rack includes a track arranged vertically or obliquely relative to the ground, and a space enclosed by the track forms an inspection channel; and the back scattering inspection device includes a back scattering ray emitting device and a back scattering detector, and the back scattering inspection device is movably disposed on the track for inspecting an inspected object passing through the inspection channel. The back scattering inspection system can perform back scattering inspection on a plurality of surfaces of the inspected object.

公开(公告)号：US20200240961A1

公开(公告)日：2020-07-30

申请号：US16714799

申请日：2019-12-16

Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Qingjun ZHANG ,  Yuanjing LI ,  Zhiqiang CHEN ,  Weiping ZHU ,  Yaohong LIU ,  Qiufeng MA ,  Ge LI ,  Biao CAO ,  Lili YAN

IPC: G01N30/44 ,  G01N30/72

Abstract: The present disclosure discloses a gas chromatograph-ion mobility spectrometry combined equipment, including: a gas chromatograph device for pre-separating a to-be-detected sample to form a pre-separated sample; an ion mobility spectrometry device in fluid communication with an outlet of the gas chromatograph device for detecting the pre-separated sample; and a gas circulating device in fluid communication with a discharged gas interface of the ion mobility spectrometry device for processing a discharged gas from the ion mobility spectrometry device, wherein the gas circulating device is further in gas communication with the gas chromatograph device for conveying a part of the discharged gas to the gas chromatograph device to serve as a carrier gas, which drives the to-be-detected sample to enter the gas chromatograph device. The miniaturization and the portability of the gas chromatograph-ion mobility spectrometry combined equipment are improved.