公开(公告)号：US20190170894A1

公开(公告)日：2019-06-06

申请号：US16253221

申请日：2019-01-22

Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Kejun KANG ,  Yaohong LIU ,  Ziran ZHAO ,  Wei JIA ,  Jianping GU ,  Chuanxiang TANG ,  Huaibi CHEN ,  Jianjun GAO ,  Wei YIN ,  Xiying LIU

IPC: G01V5/00 ,  G01T1/29 ,  G01N23/04

Abstract: This invention provides a scan method, scan system and radiation scan controller, and relates to the field of radiation. The scanning method includes obtaining detection data of an object to be inspected under radiation scanning using a detector, adjusting an accelerator output beam dose rate and/or an output electron beam energy level of a radiation emission device according to the detection data. With this method, working conditions of the accelerator of the radiation emission device may be adjusted according to the detection data detected by the detector, so that for a region having a larger mass thickness, a higher output beam dose rate or a higher electron beam output energy level is adopted to guarantee satisfied imaging technical indexes, for a region having a smaller mass thickness, a lower output beam dose rate or a lower electron beam output energy level is adopted to reduce the environmental dose level while guaranteeing satisfied imaging technical indexes.

公开(公告)号：US20160103241A1

公开(公告)日：2016-04-14

申请号：US14892640

申请日：2014-01-17

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Kejun KANG ,  Jianmin LI ,  Ying LI ,  Yuanjing LI ,  Wei YIN ,  Juan ZHENG ,  Lei ZENG

IPC: G01V5/00

CPC classification number: G01V5/0041 ,  G01V5/0025

Abstract: The disclosure provides a multi-power multi-dosage accelerator. The multi-power multi-dosage accelerator comprises an electron gun configured to provide a first voltage of the electron gun and a second voltage of the electron gun, and an accelerating tube configured to generate a first X-ray having a first dosage and first power according to the first voltage of the electron gun and generate a second X-ray having a second dosage and second power according to the second voltage of the electron gun, wherein the first dosage is a dosage which can be accepted by human bodies and is much less than the second dosage, the first X-ray is used for inspecting a first area where a person is located, and the second X-ray is used for inspecting a second area where goods are located.

Abstract translation: 本公开提供了一种多功率多剂量加速器。 多功率多剂量促进剂包括电子枪，其被配置为提供电子枪的第一电压和电子枪的第二电压;以及加速管，被配置为产生具有第一剂量和第一功率的第一X射线 根据电子枪的第一电压，根据电子枪的第二电压生成具有第二剂量和第二功率的第二X射线，其中第一剂量是可被人体接受的剂量， 小于第二剂量时，第一X射线用于检查人的第一区域，并且第二X射线用于检查货物所在的第二区域。

公开(公告)号：US20190206095A1

公开(公告)日：2019-07-04

申请号：US16235882

申请日：2018-12-28

Applicant: Tsinghua University ,  NUCTECH COMPANY LIMITED

Inventor： Yuxiang XING ,  Kaichao LIANG ,  Le SHEN ,  Li ZHANG ,  Hongkai YANG ,  Kejun KANG ,  Zhiqiang CHEN ,  Jianmin LI ,  Yinong LIU

IPC: G06T11/00 ,  G06N3/08

CPC classification number: G06T11/003

Abstract: An image processing method, comprising: acquiring, by a CT scanning system, projection data of an object; and processing, by using a convolutional neural network, the projection data, to acquire an estimated image of the object. The convolutional neural network comprises: a projection domain network for processing input projection data to obtain estimated projection data; an analytical reconstruction network layer for performing analytical reconstruction to obtain a reconstructed image; an image domain network for processing the reconstructed image to obtain an estimated image, a projection layer for performing a projection operation by using a system projection matrix of the CT scanning system, to obtain a projection result of the estimated image; and a statistical model layer for determining consistency among the input projection data, the estimated projection data, and the projection result of the estimated image based on a statistical model.

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：US20150048263A1

公开(公告)日：2015-02-19

申请号：US14459408

申请日：2014-08-14

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Kejun KANG ,  Yuanjing LI ,  Ying LI ,  Jianmin LI ,  Junli LI ,  Yanli DENG

IPC: G21F3/00 ,  G21F1/04 ,  G21F1/02

CPC classification number: G21F3/00 ,  G01V5/0016 ,  G21F1/023 ,  G21F1/042

Abstract: A radiation protection device is disclosed in the embodiment of the present invention. The radiation protection device is used for a system which is configured to perform safety inspection of a cargo or a vehicle by a ray. The radiation protection device comprising: at least one container, and a radiation protection part disposed within the container. The radiation protection material may comprise at least one of concrete, sandstone, and water, or the radiation protection part may comprise a steel-lead protection wall or a concrete protection wall. With the radiation protection device according to the embodiment of the present invention, after the container is transported to the site, it can be directly put in place to be capable of shielding rays without needing operation or with only simple operation. The amount of on-site work, construction time, and construction cost are low.

Abstract translation: 在本发明的实施例中公开了一种辐射防护装置。 辐射防护装置用于被配置为通过射线执行货物或车辆的安全检查的系统。 辐射防护装置包括：至少一个容器和设置在容器内的辐射防护部分。 辐射防护材料可以包括混凝土，砂岩和水中的至少一种，或者辐射防护部分可以包括钢 - 铅保护壁或混凝土保护壁。 根据本发明的实施方式的放射线防护装置，在将容器运送到现场后，可以将其直接放置在能够屏蔽射线的地方，而无需操作或操作简单。 现场工作量，施工时间和施工成本低。

公开(公告)号：US20170186507A1

公开(公告)日：2017-06-29

申请号：US15277828

申请日：2016-09-27

Applicant: Tsinghua University ,  NUCTECH COMPANY LIMITED

Inventor： Kejun KANG ,  Ying LI ,  Jianmin LI ,  Yulan LI ,  Guoping ZHU

IPC: G21K1/04 ,  G01V5/00

CPC classification number: G21K1/043 ,  G01V5/0016 ,  G21K1/04

Abstract: A collimator and an inspection system having the collimator are disclosed. The collimator includes: a collimator body including a first part and a second part; a collimating slit formed between the first part and the second part and having a first end and a second end in a longitudinal direction thereof; and a shielding member which is movable relative to the collimator body such that both a beam divergent angle and an elevation angle of a ray beam propagating through the collimating slit are varied. An inspection system and an inspection method for scanning a vehicle are further disclosed.

公开(公告)号：US20160258884A1

公开(公告)日：2016-09-08

申请号：US14399566

申请日：2014-07-31

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Kejun KANG ,  Jianmin LI ,  Jingyu GU ,  Yuanjing LI ,  Yulan LI ,  Yaohong LIU ,  Zhen TAN ,  Yucheng WU ,  Weizhen WANG

IPC: G01N23/04

CPC classification number: G01V5/0066 ,  B64F5/60 ,  G01N23/04 ,  G01N23/10 ,  G01N2223/631 ,  G01V5/0016 ,  H01J37/023 ,  H01L27/14618

Abstract: The present disclosure provides a system and method for inspecting an aircraft. A ray source and a detector locate at above and below of a fuselage of an aircraft, respectively. The ray source emits a beam of rays, which pass through the aircraft to be detected. The detector receives and converts the beam of rays that pass through the aircraft to an output signal, and generates a vertical transmission image in real time.

Abstract translation: 本公开提供了一种用于检查飞行器的系统和方法。 射线源和探测器分别位于飞机机身的上方和下方。 射线源发出一束通过飞机的射线，以便被检测。 检测器将通过飞机的射线束接收并转换成输出信号，并实时生成垂直透射图像。

公开(公告)号：US20160187502A1

公开(公告)日：2016-06-30

申请号：US14981953

申请日：2015-12-29

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Kejun KANG ,  Shuwei LI ,  Qingjun ZHANG ,  Yuanjing LI ,  Yulan LI ,  Ziran ZHAO ,  Yinong LIU ,  Yaohong LIU ,  Weibin ZHU ,  Xiaolin ZHAO ,  Huishao HE

IPC: G01T7/00 ,  G01T1/20 ,  G01T1/16 ,  G21K1/02

CPC classification number: G01T7/00 ,  G01T1/1603 ,  G01T1/17 ,  G01T1/2006 ,  G01V5/0016 ,  G06T1/0014 ,  G09G2320/0626 ,  G09G2320/0646 ,  G21K1/02 ,  H01L27/30 ,  H04N5/3698 ,  H04N5/57 ,  H05G1/36

Abstract: The present invention discloses an X-ray beam intensity monitoring device and an X-ray inspection system. The X-ray beam intensity monitoring device comprises an intensity detecting module and a data processing module, wherein the intensity detecting module is adopted to be irradiated by the X-ray beam and send a detecting signal, the data processing module is coupled with the intensity detecting module to receive the detecting signal and output an X-ray beam intensity monitoring signal, wherein the X-ray beam intensity monitoring signal includes a dose monitoring signal of the X-ray beam and a brightness correction signal of the X-ray beam. The X-ray beam intensity monitoring device can simultaneously perform dose monitoring and brightness monitoring, thereby improving the service efficiency of the X-ray beam intensity monitoring device. Moreover, the monitoring result of the X-ray beam intensity can be more accurate and reliable.

Abstract translation: 本发明公开了一种X射线束强度监测装置和X射线检查系统。 X射线束强度监测装置包括强度检测模块和数据处理模块，其中强度检测模块被X射线束照射并发送检测信号，数据处理模块与强度 检测模块，用于接收检测信号并输出​​X射线束强度监测信号，其中X射线束强度监测信号包括X射线束的剂量监测信号和X射线束的亮度校正信号。 X射线束强度监测装置可以同时进行剂量监测和亮度监测，从而提高X射线束强度监测装置的使用效率。 此外，X射线束强度的监测结果可以更准确可靠。

公开(公告)号：US20240334585A1

公开(公告)日：2024-10-03

申请号：US18575277

申请日：2022-07-05

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Kejun KANG ,  Yaohong LIU ,  Huaibi CHEN ,  Liang ZHANG ,  Chuanxiang TANG ,  Yuanjing LI

IPC: H05H7/02 ,  H05G1/32 ,  H05H7/12

CPC classification number: H05H7/02 ,  H05G1/32 ,  H05H7/12 ,  H05H2007/027

Abstract: A ray generating device and a control method thereof are provided. The ray generating device includes: an electronic beam generating device; a microwave generating device; a microwave circulator, having a power input port and at least two power output ports, the power input port being connected to the microwave generating device; a plurality of accelerating tubes respectively connected to at least two power output ports, configured to respectively receive a plurality of electronic beams, and accelerate electronic beams respectively through microwaves received from the at least two power output ports, and to respectively generate a plurality of rays having at least two different energies; and a controller, configured to perform chronological control on microwave power of the microwave generating device, and chronological control on beam loadings of the electronic beams generated by the electronic beam generating device and respectively corresponding to accelerating tubes.