公开(公告)号：US20230251399A1

公开(公告)日：2023-08-10

申请号：US18013094

申请日：2021-06-24

Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

Inventor： Zhiqiang CHEN ,  Ziran ZHAO ,  Yingkang JIN ,  Xiaoyi HE ,  Li ZHANG ,  Mengjiao ZHAO ,  Zhimin ZHENG ,  Yihai ZHANG ,  Yaning LI ,  Xiaoxiao FENG

IPC: G01V8/00

CPC classification number: G01V8/005

Abstract: Provided is a server of a checking system based on a millimeter wave security inspection device, connected to a security inspection instrument through a switching system, the server includes a memory and a processor, the memory stores instructions, and the instructions, when executed by the processor, cause the processor to: receive a scanned image of an object and an ATR image interpretation result of the object from the security inspection instrument, wherein the ATR image interpretation result is obtained by the security inspection instrument performing an automatic threat recognition (ATR) image interpretation on the scanned image, and perform a manual inspection task on the object and perform an image interpretation task on the scanned image according to a working mode, wherein the working mode indicates whether the checking system is provided with a manual inspection station and an image interpretation station.

公开(公告)号：US20210215582A1

公开(公告)日：2021-07-15

申请号：US16314063

申请日：2018-12-10

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Qingjun ZHANG ,  Yuanjing LI ,  Zhiqiang CHEN ,  Ziran ZHAO ,  Yinong LIU ,  Yaohong LIU ,  Lili YAN ,  Ge LI ,  Qiufeng MA

IPC: G01N1/34 ,  G01N1/44 ,  G01N27/622 ,  G01N1/22

Abstract: Embodiments of the present disclosure provide a gas purifying device and an ion migration spectrometer. The gas purifying device includes a first purificant vessel, a second purificant vessel and a valve communicated between the first purificant vessel and the second purificant vessel. The valve is configured to allow a gas flows from the second purificant vessel to the first purificant vessel in a first state and to permit the gas to flow from the first purificant vessel to the second purificant vessel in a second state.

公开(公告)号：US20210025836A1

公开(公告)日：2021-01-28

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：US20200309987A1

公开(公告)日：2020-10-01

申请号：US16314093

申请日：2017-09-12

Applicant: Nuctech Company Limited

Inventor： Guangming XU ,  Bicheng LIU ,  Ziran ZHAO ,  Jianping GU ,  Qiang LI ,  Lan ZHANG

IPC: G01V5/00 ,  G01N23/087 ,  G01R23/18

Abstract: The present disclosure discloses a method of substance identification of an item to be inspected using a multi-energy-spectrum X-ray imaging system, the method comprising: acquiring a transparency related vector consisting of transparency values of the item to be inspected in N energy regions, wherein N is greater than 2; calculating distances between the transparency related vector and transparency related vectors stored in the system consisting of N transparency mean values of multiple kinds of items with multiple thicknesses in the N energy regions; and identifying the item to be inspected as the item corresponding to the minimum distance. The present disclosure is based on a multi-energy-spectrum X-ray imaging system, and proposes a method of substance identification by analyzing the multi-energy-spectrum substance identification issue.

公开(公告)号：US20200249373A1

公开(公告)日：2020-08-06

申请号：US16725886

申请日：2019-12-23

Applicant: Nuctech Company Limited

Inventor： Ziran ZHAO ,  Yingkang JIN ,  Lingbo QIAO ,  Zhimin ZHENG ,  Ming XU ,  Xilei LUO

IPC: G01V8/00 ,  G03H1/00

Abstract: The disclosure discloses a millimeter wave security inspection apparatus and a method for inspecting human or article. The apparatus includes: a door device including a first door and a second door arranged in a stacked mode and each made of a material allowing a millimeter wave to penetrate therethrough; a millimeter wave transceiver arranged between the first door and the second door and including an millimeter wave transceiving antenna array configured to transmit and receive a millimeter wave signal to and from an entrance side and an exit side of the door device; and a linear driver to which the millimeter wave transceiver is connected to be movable relative to the door device, so as to scan a first side of an object positioned at the entrance side and a second side of the object opposite to the first side positioned at the exit side.

公开(公告)号：US20190234870A1

公开(公告)日：2019-08-01

申请号：US16232318

申请日：2018-12-26

Applicant: NUCTECH COMPANY LIMITED

Inventor： Ziran ZHAO ,  Haifan Hu ,  Xuming Ma ,  Yingxin Wang

IPC: G01N21/3581 ,  G01J1/44

CPC classification number: G01N21/3581 ,  G01J1/0411 ,  G01J1/42 ,  G01J1/44 ,  G01J2001/4466 ,  G01J2001/448

Abstract: The present disclosure provides a terahertz detector. The terahertz detector includes a planar array structure that is constituted by a plurality of pixel units, the plurality of pixel units each include N sub pixels and each of the sub pixels includes no more than one signal trigger configured to transform a terahertz signal to an electrical current pulsing signal, and each of the plurality of pixel units detects a signal that is a sum of the electrical current pulsing signals of the N sub pixels, where N is an integer greater than 1.

公开(公告)号：US20180038798A1

公开(公告)日：2018-02-08

申请号：US15613265

申请日：2017-06-05

Applicant: Nuctech Company Limited

Inventor： Li ZHANG ,  Ziran ZHAO ,  Jianhong ZHANG ,  Hongqiu WANG ,  Yubo ZHANG ,  Haihui LIU

IPC: G01N21/65 ,  G01J3/02 ,  G01J3/44

CPC classification number: G01N21/65 ,  G01J3/0208 ,  G01J3/021 ,  G01J3/0218 ,  G01J3/0221 ,  G01J3/0227 ,  G01J3/0256 ,  G01J3/44 ,  G01J2003/1213 ,  G01N2201/0221 ,  G01N2201/06113 ,  G01N2201/08 ,  G01N2201/0833

Abstract: The disclosure provides a portable Raman device that includes a laser for emitting exciting light; a spectrometer for receiving Raman scattered light and converting the Raman scattered light into an electrical signal after beam splitting; a probe for leading the exciting light to irradiate on a sample and collect the Raman scattered light of the sample; and a fiber system connected between the laser and the probe as well as between the probe and the spectrometer so as to conduct light transmission. In comparison to conventional Raman devices, the portable Raman device of the disclosure has a simplified optical system, such that placement of components of the Raman device are more flexible, the whole size of the Raman device are reduced, and thus requirements of size miniaturization and quick real-time measurement are satisfied.

公开(公告)号：US20170329038A1

公开(公告)日：2017-11-16

申请号：US15411348

申请日：2017-01-20

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Kejun KANG ,  Zhiqiang CHEN ,  Yuanjing LI ,  Ziran ZHAO ,  Junli LI ,  Xuewu WANG ,  Yaohong LIU ,  Zhi ZENG ,  Jianping GU ,  Song LIANG ,  Bicheng LIU ,  Guangming XU ,  Yongqiang WANG

IPC: G01V5/00

CPC classification number: G01V5/0016 ,  G01N2223/205 ,  G01T1/167 ,  G01T5/002 ,  G01T5/02 ,  G01V5/0025 ,  G01V5/0075 ,  G01V5/0091 ,  G06K9/6267

Abstract: The present application relates to a method, apparatus and system for inspecting an object based on a cosmic ray, pertaining to the technical field of radiometric imaging and safety inspection. The method includes: recording a movement trajectory of an inspected object by using a monitoring device; acquiring information of charged particles in the cosmic ray by using a position-sensitive detector, the information of charged particles comprising trajectory information of the charged particles; performing position coincidence for the movement trajectory and the trajectory information to determine the object; performing trajectory remodeling for the charged particles according to the information of charged particles; and identifying a material inside the moving object according to the trajectory remodeling. According to the present disclosure, pedestrians who are walking and moving are inspected by using the cosmic ray, and nuclear materials, drugs and explosive materials and the like carried by human bodies may be detected.

公开(公告)号：US20170309043A1

公开(公告)日：2017-10-26

申请号：US15129455

申请日：2015-12-23

Applicant: Tsinghua University ,  NUCTECH COMPANY LIMITED

Inventor： Liang LI ,  Zhiqiang CHEN ,  Kejun KANG ,  Li ZHANG ,  Ziran ZHAO ,  Yuxiang XING ,  Yongshun XIAO ,  Jianping GU ,  Juan ZHENG

IPC: G06T11/00 ,  G06T7/00

CPC classification number: G06T11/003 ,  G01N23/04 ,  G06T7/0002 ,  G06T11/008 ,  G06T2207/10081 ,  G06T2207/30112 ,  G06T2211/408

Abstract: Disclosed is a dual-energy ray imaging method and system. The method comprises: calculating the mass thicknesses of the materials in the overlapped area of two materials by using a calibrated surface fitting method, and then decomposing a pair of original high-energy and low-energy data for this pixel into two high-low-energy data sets corresponding to the two materials, and finally calculating and acquiring the composition result of different materials for each pixel. The disclosure is especially advantageous in that the problem of error recognition of materials due to the two overlapped materials can be eliminated and the stratified imaging of multiple materials can be achieved, thereby improving the accuracy of the substance recognition and reducing the rate of false positive and false negative which is very important to the applications in the field of security check and anti-smuggling.

公开(公告)号：US20170068017A1

公开(公告)日：2017-03-09

申请号：US15230316

申请日：2016-08-05

Applicant: NUCTECH COMPANY LIMITED ,  NUCTECH JIANGSU COMPANY LIMITED

Inventor： Ziran ZHAO ,  Zhiqiang Chen ,  Wanlong Wu ,  Li Zhang ,  Yingkang Jin ,  Ming Ruan

IPC: G01V5/00

CPC classification number: G01V5/0016

Abstract: A safety inspection apparatus is disclosed in embodiments of the present invention. The safety inspection apparatus includes: an x-ray source including a ray emission focal spot; and a plurality of detector modules each of which has a ray receiving surface, and which are arranged along a plurality of straight line segments. The plurality of straight line segments include a first straight line segment and two second straight line segments, and, the two second straight line segments extend from the two ends of the first straight line segment towards the x-ray source side, respectively. In a plane where the sectorial ray beam is located, a normal to the ray receiving surface of each of the detector modules at a midpoint of the ray receiving surface of the each of the detector modules passes generally through the ray emission focal spot of the x-ray source.

Abstract translation: 在本发明的实施例中公开了一种安全检查装置。 安全检查装置包括：x射线源，包括射线发射焦点; 以及多个检测器模块，每个检测器模块具有一个光线接收表面，并沿着多条直线段布置。 多个直线段包括第一直线段和两个第二直线段，并且两个第二直线段分别从第一直线段的两端朝向x射线源侧延伸。 在扇形射线束所在的平面中，每个检测器模块的射线接收表面的中点处的每个检测器模块的射线接收表面的法线通常通过x的射线发射焦斑 来源。