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21. 发明授权

US09448188B2 Vehicular radiation inspection system 有权
标题翻译：车载辐射检查系统
公开(公告)号：US09448188B2
公开(公告)日：2016-09-20
申请号：US14412516
申请日：2013-07-02
申请人： Nuctech Company Limited , Tsinghua University
发明人： Jianmin Li , Yinong Liu , Yulan Li , Chunguang Zong , Hui Gong , Qingping Huang , Weifeng Yu
IPC分类号： G01N23/10 , G01N23/04 , G01V5/00
CPC分类号： G01N23/10 , G01N23/04 , G01N2223/301 , G01N2223/308 , G01V5/0016 , G01V5/0066
摘要： The present invention discloses a vehicular radiation inspection system comprising a mobile vehicle body, a detection arm, a radiation source and a detector. The vehicular radiation inspection system further comprises a following mechanism separated from the detection arm. The following mechanism contains radiation protection material, and the following mechanism follows the detection arm to move in a non-contact manner during inspection of the inspected object, so as to prevent radiation leakage. In the present invention, it does not need to infuse radiation protection material having a high density, such as lead, into the detection arm. Therefore, it can effectively decrease the weight of the detection arm, and it does not need to provide a balance counterweight on the mobile vehicle body on which the detection arm is carried, thereby effectively solving the problem that the vehicular radiation inspection system has an excessively large mass. Meanwhile, in the present invention, the moving process of the following mechanism is accurately controlled, so as to prevent the following mechanism from hitting the detection arm.
摘要翻译：本发明公开了一种包括移动车身，检测臂，辐射源和检测器的车辆辐射检查系统。车辆辐射检查系统还包括与检测臂分离的跟随机构。以下机构包含辐射防护材料，并且在检查被检查物体的检查期间，跟随检测臂的机构以非接触的方式移动，以防止辐射泄漏。在本发明中，不需要将诸如铅的高密度的辐射防护材料注入到检测臂中。因此，能够有效地降低检测臂的重量，并且不需要在携带检测臂的移动体上提供平衡配重，从而有效地解决了车辆用辐射检查系统过度的问题大量。同时，在本发明中，精确地控制以下机构的移动过程，以防止以下机构撞击检测臂。

22. 发明申请

US20150332486A1 Spiral CT Systems and Reconstruction Methods 有权
标题翻译：螺旋CT系统和重建方法
公开(公告)号：US20150332486A1
公开(公告)日：2015-11-19
申请号：US14708866
申请日：2015-05-11
申请人： Nuctech Company Limited , Tsinghua University
发明人： Li Zhang , Zhiqiang Chen , Le Shen , Yuxiang Xing , Xin Jin , Qingping Huang
IPC分类号： G06T11/00 , G06T7/00 , A61B6/00 , A61B6/03 , A61B6/02
CPC分类号： G06T11/006 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/4266 , A61B6/5205 , G06T7/0012 , G06T2207/10081 , G06T2207/30004 , G06T2211/421
摘要： The present disclosure discloses a spiral CT system and a reconstruction method thereof. In some embodiments, it is proposed that data missing due to a large pitch is compensated by weighting the complementary projection data of the projection data obtained using the spiral CT system. After the data is complemented, the projection data is rebinned as cone parallel beam data, cone-angle cosine weighting and one-dimensional filtering are implemented on the rebinned data, and parallel beam back projection is finally implemented on the filtered data, to obtain the reconstructed images. In some embodiments, with the above method, the speed of the belt can be increased by more than one time in a case that the existing area of the detectors and the existing speed of the slip ring are unchanged, thereby improving the pass rate of the luggage and maintaining the quality of the reconstructed images unchanged.
摘要翻译：本公开公开了一种螺旋CT系统及其重建方法。在一些实施例中，提出通过对使用螺旋CT系统获得的投影数据的互补投影数据进行加权来补偿由于大音调而丢失的数据。数据补充后，将投影数据重新设置为锥形平行光束数据，对重定位数据进行锥角余弦加权和一维滤波，最后在滤波数据上实现平行光束反投影，获得重建图像。在一些实施例中，利用上述方法，在检测器的现有区域和滑环的现有速度不变的情况下，带的速度可以增加多于一次，从而提高了传感器的通过率行李保持重建图像的质量不变。

23. 发明授权

US11866262B2 Automatic tray feeding device, tray sorting table including and security inspection system including the device 有权
公开(公告)号：US11866262B2
公开(公告)日：2024-01-09
申请号：US17511874
申请日：2021-10-27
申请人： Nuctech Company Limited , Tsinghua University
发明人： Zhiqiang Chen , Li Zhang , Jinning Liang , Qingping Huang , Mingzhi Hong , Yanhua Lu , Bo Li , Yue Li , Majie Weng
IPC分类号： B65G13/07 , B65G47/57
CPC分类号： B65G13/07 , B65G47/57 , B65G2201/0258 , B65G2203/0233 , B65G2203/044
摘要： An automatically tray feeding device includes: at least one conveying mechanism configured to convey a tray at different heights; at least one lifting mechanism configured to move the tray on a conveying mechanism at a first height to a conveying mechanism at a second height different from the first height; and a sorting table frame configured to carry the at least one conveying mechanism and the at least one lifting mechanism.

24. 发明授权

US10643759B2 Grating and radiation imaging device 有权
公开(公告)号：US10643759B2
公开(公告)日：2020-05-05
申请号：US15802473
申请日：2017-11-03
申请人： Tsinghua University , Nuctech Company Limited
发明人： Li Zhang , Mingzhi Hong , Qingping Huang , Le Shen
IPC分类号： G21K1/00 , G21K1/06 , G21K1/02 , G02B5/18
CPC分类号： G21K1/06 , G02B5/1838 , G21K1/025 , G21K2201/067 , G21K2207/005
摘要： The disclosure relates to a grating and a radiation imaging device. The grating comprises a plurality of stacked grating elements. The grating elements are stacked to form a grid. The grating element comprises a first sheet and a second sheet having two parallel planes. The second sheet is stacked at the first sheet in a length direction of the first sheet. The first sheet is almost impervious to radiation. The present disclosure stacks the sheets having different specifications together to form the grating with uniform grating slits, such that there is no limitation on the thickness of the grating and the grating can be used along with high-energy radiations.

25. 发明申请

US20170075026A1 INSPECTION DEVICES, INSPECTION METHODS AND INSPECTION SYSTEMS 审中-公开
标题翻译：检查设备，检查方法和检查系统
公开(公告)号：US20170075026A1
公开(公告)日：2017-03-16
申请号：US15122659
申请日：2015-03-03
申请人： Tsinghua University , Nuctech Company Limited
发明人： Zhiqiang Chen , Li Zhang , Tianyi Yangdai , Qingping Huang
IPC分类号： G01V5/00 , G01N23/10 , G01N23/083
CPC分类号： G01V5/0025 , G01N23/083 , G01N23/10 , G01N2223/50 , G01N2223/643 , G01T1/36 , G01V5/0033 , G01V5/0066
摘要： The present disclosure discloses an inspection device, an inspection method and an inspection system. The device comprises a distributed ray source comprising multiple source points; a light source collimator configured to converge the rays generated by the distributed ray source to form an inverted fan-shaped ray beam; a scatter collimator configured to only allow rays scattered at one or more particular scattering angles which are generated by the rays from the light source collimator interacting with inspected objects to pass; at least one detector each comprising multiple detection units which have an energy resolution capability and are substantially arranged in a cylindrical surface to receive the scattered rays passing through the scatter collimator; and a processing apparatus configured to calculate energy spectrum information of the scattered rays from the inspected objects based on a signal output by the detectors.
摘要翻译：本公开公开了一种检查装置，检查方法和检查系统。该装置包括分布式射线源，其包括多个源点; 光源准直器，其被配置为会聚由所述分布式射线源产生的射线，以形成倒置的扇形射线束; 散射准直仪被配置为仅允许以与被检查物体相互作用的光源准直仪的光线产生的一个或多个特定散射角散射的光线; 至少一个检测器，每个检测器包括具有能量分辨能力的多个检测单元，并且基本上布置在圆柱形表面中以接收穿过散射准直仪的散射光线; 以及处理装置，被配置为基于由检测器输出的信号计算来自被检查物体的散射光的能谱信息。

26. 发明授权

US09449399B2 Recognizing method of flaky or blocky prohibited articles, explosives or drugs 有权
标题翻译：识别薄片或块状物品，爆炸物或药物的方法
公开(公告)号：US09449399B2
公开(公告)日：2016-09-20
申请号：US14162225
申请日：2014-01-23
申请人： Tsinghua University , Nuctech Company Limited
发明人： Li Zhang , Qingping Huang , Yunda Sun , Lei Lei , Zhi Tang
IPC分类号： G06T7/40 , G01V5/00
CPC分类号： G06K9/6267 , G01V5/005 , G06K9/52 , G06K2009/4666 , G06T5/00 , G06T7/40 , G06T7/60 , G06T2207/10088 , G06T2207/20021 , G06T2207/20172 , G06T2207/30242
摘要： The present invention discloses recognizing methods of flaky or blocky prohibited articles, explosives or drugs. Specifically, the method for recognizing flaky prohibited articles, explosives or drugs comprises steps of: (1) reading in tomogram data of an object to be inspected for one tomogram; (2) pre-processing the tomogram data; (3) splitting the pre-processed tomogram data into a plurality of regions that have similar physical properties; (4) analyzing whether each of the split regions is a flaky region; (5) determining whether the flaky region recognized in the current tomogram can be merged with the flaky region detected from the previous tomogram, so as to form a flaky target; (6) determining whether each detected flaky target is complete or finished; (7) repeating steps (1)-(6) and processing each tomogram data layer by layer, until all of the tomogram data have been processed.
摘要翻译：本发明公开了识别片状或块状物品，爆炸物或药物的方法。具体来说，用于识别片状禁止物品，爆炸物或药物的方法包括以下步骤：（1）读取对于一个断层图像进行检查的物体的断层图数据; （2）预处理断层图像数据; （3）将预处理的断层图像数据分割成具有类似物理性质的多个区域; （4）分析每个分割区域是否是片状区域; （5）确定在当前断层图像中识别的片状区域是否可以与从先前断层图像检测到的片状区域合并，以便形成片状目标; （6）确定每个检测到的片状目标是完整还是完成; （7）重复步骤（1） - （6）并逐层处理每个断层图像数据，直到所有断层图像数据都被处理。

27. 发明授权

US11768163B2 CT system and detection device for CT system 有权
公开(公告)号：US11768163B2
公开(公告)日：2023-09-26
申请号：US17309684
申请日：2019-09-10
申请人： Nuctech Company Limited , Tsinghua University
发明人： Li Zhang , Zhiqiang Chen , Qingping Huang , Yunda Sun , Xin Jin , Le Shen , Liang Li , Tiao Zhao
IPC分类号： G01N23/046 , G01V5/00
CPC分类号： G01N23/046 , G01V5/005 , G01N2223/639
摘要： The present application discloses a CT system and a detection apparatus for the CT system. The detection apparatus includes: a high-energy detector assembly including a plurality of rows of high-energy detectors arranged along a predetermined trajectory; a low-energy detector assembly including a plurality of rows of low-energy detectors arranged at intervals along the predetermined trajectory, the low-energy detector assembly and the high-energy detector assembly being disposed in a stack; a number of rows of the low-energy detectors is smaller than a number or rows of the high-energy detectors; and each row of the low-energy detectors covers a row of high-energy detectors.

28. 发明授权

US10634810B2 Scanning imaging system for security inspection of an object and imaging method thereof 有权
公开(公告)号：US10634810B2
公开(公告)日：2020-04-28
申请号：US16037810
申请日：2018-07-17
申请人： Nuctech Company Limited , Tsinghua University
发明人： Li Zhang , Zhiqiang Chen , Le Shen , Qingping Huang , Yunda Sun , Xin Jin , Hui Ding , Yuxiang Xing
IPC分类号： G01N23/00 , G01V5/00 , G01N23/046
CPC分类号： G01V5/005 , G01N23/046 , G01V5/0058 , G01N2223/20 , G01N2223/3307
摘要： The disclosure provides a scanning imaging system for security inspection of an object and an imaging method thereof, the system comprising: a conveying unit configured for bringing the object to move along a conveying direction; a plurality of radiographic sources at one side of the conveying unit, being arranged successively in a direction vertical to a plane, in which the conveying unit is located, and configured for alternately emitting ray beams to form a scanning area; a linear detector array at the other side of the conveying unit, being configured for detecting first projection images, which are formed after the ray beams emitted by the plurality of radiographic sources penetrate through the object, in the process of the object passing through the scanning area; an imaging unit configured for obtaining a first reconstructed image of the object based on the first projection images of the plurality of radiographic sources.

29. 发明授权

US10353110B2 Method and device for operating CT-based three-dimensional image used for security inspection 有权
公开(公告)号：US10353110B2
公开(公告)日：2019-07-16
申请号：US15301060
申请日：2015-12-16
申请人： TSINGHUA UNIVERSITY , Nuctech Company Limited
发明人： Li Zhang , Shuo Wang , Yunda Sun , Qingping Huang
IPC分类号： G01N23/00 , G01V5/00 , G01N23/04 , G06T7/50 , G06T7/90 , G01N23/046 , G06T7/00 , G06T7/40
摘要： The present disclosure provides a method and device for operating a CT-based three-dimensional image used for security inspection. The method includes: providing a CT-based three-dimensional image used for security inspection; accepting a selection of an image of an object in the three-dimensional image; and responding to the selection. The present disclosure has strong practicality, and can provide effective reference information for image judgment in the CT-based security inspection field.

30. 发明授权

US10102641B2 Methods for extracting shape feature, inspection methods and apparatuses 有权
公开(公告)号：US10102641B2
公开(公告)日：2018-10-16
申请号：US15204564
申请日：2016-07-07
申请人： TSINGHUA UNIVERSITY , NUCTECH COMPANY LIMITED
发明人： Zhiqiang Chen , Li Zhang , Ziran Zhao , Qingping Huang , Qiang Li , Jianping Gu , Yunda Sun
IPC分类号： G06T7/593 , G06T7/00 , G06K9/00 , G06K9/62 , G06T11/00 , G06T7/68
摘要： Methods for extracting a shape feature of an object and security inspection methods and apparatuses. Use is made of CT's capability of obtaining a 3D structure. The shape of an object in an inspected luggage is used as a feature of a suspicious object in combination with a material property of the object. For example, a false alarm rate in detection of suspicious explosives may be reduced.

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