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公开(公告)号：US20140185754A1
公开(公告)日：2014-07-03
申请号：US14134845
申请日：2013-12-19
Applicant: TSINGHUA UNIVERSITY , NUCTECH COMPANY LIMITED
Inventor： Huaping Tang , Yuanjing Li , Ziran Zhao , Yaohong Liu , Zhanfeng Qin , Jinyu Zhang , Hu Tang
IPC: G01V5/00
CPC classification number: G01V5/0016 , G01N23/046 , G01V5/005
Abstract: This invention relates to an X-ray goods inspection apparatus, and in particular to a goods inspection apparatus using distributed X-ray source.
Abstract translation: 本发明涉及一种X射线物品检查装置，特别涉及一种使用分布式X射线源的货物检验装置。
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公开(公告)号：US20140050305A1
公开(公告)日：2014-02-20
申请号：US14005605
申请日：2012-12-31
Applicant: NUCTECH COMPANY LIMITED
Inventor： Ziran Zhao , Zhiqiang Chen , Xilei Luo , Fuhua Ding , Wanlong Wu , Zhimin Zheng
IPC: H01J35/16
CPC classification number: H01J35/16 , G01N23/04 , H01J35/105 , H01J35/106 , H01J35/12 , H05G1/025 , H05G1/04 , H05G1/08 , H05G1/085
Abstract: Embodiments include an X-ray generator including a radiation device installation housing and an X-ray generator. In various embodiments, the radiation device installation housing comprises a housing body, a flange fixedly provided on an inner wall of the housing body and shaped in circular and a compensation device fixedly or movably connected with the flange in a liquid tight manner; a liquid receiving cavity for receiving an insulating liquid formed between one side of two opposite sides of the compensation device and the inner wall of the housing body as well as the flange; a compensation device moving space formed between another side of the two opposite sides of the compensation device opposed to the inner wall of the housing body and an inner wall of the flange.
Abstract translation: 实施例包括具有辐射装置安装壳体和X射线发生器的X射线发生器。 在各种实施例中，辐射装置安装壳体包括壳体，凸缘，其固定地设置在壳体主体的内壁上并成形为圆形，并且补偿装置以液密方式与凸缘固定或可移动地连接; 用于接收在所述补偿装置的两个相对侧的一侧和所述壳体的内壁之间形成的绝缘液体的液体接收腔以及所述凸缘; 补偿装置移动空间形成在与壳体的内壁相对的补偿装置的两个相对侧的另一侧和凸缘的内壁之间。
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公开(公告)号：US20140010346A1
公开(公告)日：2014-01-09
申请号：US13946498
申请日：2013-07-19
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Zhiqiang Chen , Li Zhang , Xuewu Wang , Haifeng Hu , Hongxin Wu , Yuanjing Li , Yinong Liu , Ziran Zhao , Yuxiang Xing , Hu Tang , Yumin Yi , Jinyu Zhang
IPC: G01N23/10
CPC classification number: G01N23/10 , A61B6/027 , G01N23/046 , G01N2001/022 , G01N2223/419 , G01N2223/423 , G01N2223/637 , G01N2223/639 , G01V5/00
Abstract: Disclosed are a method and a device for security-inspection of liquid articles with dual-energy CT imaging. The method comprises the steps of obtaining one or more CT images including physical attributes of liquid article to be inspected by CT scanning and a dual-energy reconstruction method; acquiring the physical attributes of each liquid article from the CT image; and determining whether there are drugs concealed in the inspected liquid article based on the difference between the acquired physical attributes and reference physical attributes of the inspected liquid article. The CT scanning can be implemented by a normal CT scanning technique, or a spiral CT scanning technique. In the normal CT scanning technique, the scan position can be preset, or set by the operator with a DR image, or set by automatic analysis of the DR image.
Abstract translation: 公开了一种用于双能CT成像的液体物品的安全检查方法和装置。 该方法包括以下步骤：通过CT扫描获得包括待检查的液体物品的物理属性的一个或多个CT图像和双能量重建方法; 从CT图像获取每个液体物品的物理属性; 并且基于被检查的液体制品的所获取的物理属性和参考物理属性之间的差异来确定在被检查的液体制品中是否存在隐藏的药物。 CT扫描可以通过正常的CT扫描技术或螺旋CT扫描技术来实现。 在正常的CT扫描技术中，扫描位置可以由操作员预先设置，或者通过DR图像设置，或者通过DR图像的自动分析设置。
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公开(公告)号：US11151422B2
公开(公告)日：2021-10-19
申请号：US16725926
申请日：2019-12-23
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Yanjie Yao , Yongchun Liu , Yan Zhang , Ziran Zhao , Li Zhang , Yuxiang Xing
Abstract: Empty container identification method and system are disclosed. The method includes: obtaining customs declaration information, and finding out an vehicle declared as an empty container or an empty vehicle from the customs declaration information; performing X-ray inspection on the vehicle to acquire a transmission image of the vehicle; inputting the transmission image into an empty container identification model obtained by pre-training, so that the empty container identification model determines candidate regions of the transmission image, and performs post-processing analysis on the candidate regions to obtain an image identification result; and comparing the image identification result with the corresponding customs declaration information to determine whether or not the image identification result is consistent with the customs declaration information.
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公开(公告)号：US11112528B2
公开(公告)日：2021-09-07
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. Compared with the conventional dual-energy X-ray system, the multi-spectrum imaging can significantly improve the system's ability to identify substances in theory, especially in the field of security applications. The improvement of substance identification is important for contraband inspection, such as, drugs, explosives.
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Patent Agency Ranking
166.发明授权公开(公告)号：US11022569B2
公开(公告)日：2021-06-01
申请号：US16029896
申请日：2018-07-09
Applicant: Nuctech Company Limited
Inventor： Kejun Kang , Zhiqiang Chen , Yuanjing Li , Li Zhang , Ziran Zhao , Yaohong Liu , Jianping Gu , Liang Li , Yuxiang Xing
IPC: G01N23/046 , G01V5/00
Abstract: A low-angle self-swinging type computed tomography (CT) device is provided, having an X-ray accelerator and a plurality of rows of detectors and includes a slip ring, such that the slip ring with the accelerator and the detectors thereon is capable of performing a single-pendulum reciprocating movement while an object to be inspected passes through the slip ring, a three-dimensional CT image of the object is displayed, thereby achieving accurate inspection for large-scale objects, such as van containers.
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公开(公告)号：US10796436B2
公开(公告)日：2020-10-06
申请号：US15913222
申请日：2018-03-06
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Chuanhong Huang , Qiang Li , Jianping Gu , Yaohong Liu , Ziran Zhao
Abstract: An inspection apparatus and a method for segmenting an Image of a vehicle are disclosed. An X-ray transmission scanning is performed on the vehicle to obtain a transmission image. Each pixel of the transmission image is labeled with a category tag, by using a trained convolutional network. Images of respective parts of the vehicle are determined according to the category tag for each pixel. With the above solutions, it is possible to segment the images of respective parts of a vehicle more accurately in the situations that are complicated or have large variety kinds of vehicles.
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公开(公告)号：US10775302B2
公开(公告)日：2020-09-15
申请号：US16232318
申请日：2018-12-26
Applicant: NUCTECH COMPANY LIMITED
Inventor： Ziran Zhao , Haifan Hu , Xuming Ma , Yingxin Wang
IPC: G01N21/35 , G01J1/44 , G01N21/3581 , G01J1/42 , G01J1/04
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.
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公开(公告)号：US10768575B2
公开(公告)日：2020-09-08
申请号：US15562627
申请日：2016-08-19
Applicant: Nuctech Company Limited
Inventor： Zhiqiang Chen , Yuanjing Li , Ziran Zhao , Wanlong Wu , Zongjun Shen , Li Zhang , Yinong Liu , Yingkang Jin , Wentao Yu
Abstract: An imaging device and an imaging method by millimeter wave 3D holographic scanning are disclosed. In an embodiment, the millimeter wave 3D holographic scanning imaging device may include: a conveying apparatus configured to convey an object located thereon in a first direction; and at least one millimeter wave transceiving module arranged beside the conveying apparatus, each configured to be enabled to scan the object when the conveying apparatus conveys the object through the respective millimeter wave transceiving module, wherein each millimeter wave transceiving module is arranged to have its longitudinal direction extend in a direction intersecting the first direction, and includes a millimeter wave transceiving antenna array for transceiving millimeter wave signals.
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公开(公告)号：US10663413B2
公开(公告)日：2020-05-26
申请号：US15865520
申请日：2018-01-09
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Qiang Li , Jianping Gu , Bin Xu , Yaohong Liu , Ziran Zhao
IPC: G01N23/046 , G01V5/00 , G01N23/041
Abstract: A method for inspecting a container and an inspection device are disclosed. X-ray scanning is performed on the inspected container to obtain a scanned image. The scanned image is processed to obtain a region of interest. Features of texture units included in the region of interest are calculated. Local descriptions of the texture units are formed based on the features of the texture units. Distinction of each local point is calculated from a local description of each of the texture units so as to obtain a local distinct map of the region of interest. It is determined whether there is an article which is secretly carried in the inspected container using the local distinct map.
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