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11. 发明授权

US10218082B2 Wideband microstrip antennas and antenna arrays 有权
公开(公告)号：US10218082B2
公开(公告)日：2019-02-26
申请号：US14246261
申请日：2014-04-07
申请人： Nuctech Company Limited , Tsinghua University
发明人： Ziran Zhao , Zhiqiang Chen , Yuanjing Li , Wanlong Wu , Yinong Liu , Jieqing Yang , Wenguo Liu , Bin Sang , Lei Zheng
IPC分类号： G03H5/00 , H01Q1/50 , H01Q1/52 , H01Q9/04 , H01Q21/00 , H01Q21/06 , H01Q21/08 , H01Q5/378 , H01Q13/02
摘要： There is provided a wideband patch antenna and an antenna array. The antenna includes a dielectric substrate of a rectangle shape, a radiation patch formed on a top surface of the dielectric substrate, a coupling patch formed on the top surface of the dielectric substrate and extending from a side of the dielectric substrate to a position from the radiation patch by a distance, a metal support arranged on the lower surface of the dielectric substrate and extending from the edge of the lower surface of the dielectric substrate downward to the ground, a layer of air having a predetermined thickness being formed between the lower surface of the dielectric substrate and the ground. According to the embodiments, it is possible to improve the directivity of the wideband microstrip antenna while maintaining its small size.

12. 发明授权

US10152774B2 Method and system for estimating point spread function 有权
公开(公告)号：US10152774B2
公开(公告)日：2018-12-11
申请号：US15217613
申请日：2016-07-22
申请人： Tsinghua University , Nuctech Company Limited
发明人： Kejun Kang , Zhiqiang Chen , Yuanjing Li , Li Zhang , Ziran Zhao , Yaohong Liu , Jianping Gu , Zhiming Wang
IPC分类号： G06K9/00 , G06T5/00 , G06T7/77 , G06T7/44
摘要： The present disclosure relates to a method and device for estimating a point spread function. In one implementation, a method includes capturing, by a scanning device, an image by scanning a plurality of rectangle blocks which are same sized and closely arranged, wherein the plurality of rectangle blocks are made of different materials and/or have different mass thicknesses, and an incident direction of rays is perpendicular to a scanning direction and a surface of the plurality of rectangle blocks arranged closely during scanning; obtaining line spread functions for two directions along a length side and a width side of each of the rectangle blocks based on the scanned image, and obtaining standard deviation parameters of the line spread functions; and combining the standard deviation parameters for the two directions to obtain a two dimensional Point Spread Function (PSF) parameter so as to estimate the point spread function.

13. 发明授权

US10126440B2 Slow neutron conversion body and slow neutron detector 有权
公开(公告)号：US10126440B2
公开(公告)日：2018-11-13
申请号：US15280106
申请日：2016-09-29
申请人： TSINGHUA UNIVERSITY , Nuctech Company Limited
发明人： Yigang Yang , Yuanjing Li , Zhujun Fang , Yulan Li
IPC分类号： G01F23/00 , G01T3/00
摘要： The present application, pertaining to the field of slow neutron detection, relates to a slow neutron converter and a slow neutron detector. The slow neutron converter includes a substrate, the substrate including a plurality of holes extending along a first direction and insulating walls between the plurality of holes, wherein the plurality of holes are through holes. The slow neutron converter further includes a boron layer at least covering an exposed surface of the plurality of holes. The slow neutron converter and the slow neutron detector having the slow neutron converter according to the present disclosure are capable of maintaining a high slow neutron detection efficiency. In addition, the manufacturing complexity and manufacturing cost of the detector are reduced, and thus the effective, convenient and low-cost slow neutron detection is achieved.

14. 发明授权

US09978184B2 Methods and apparatuses for marking target in 3D image 有权
公开(公告)号：US09978184B2
公开(公告)日：2018-05-22
申请号：US14540440
申请日：2014-11-13
申请人： Tsinghua University , Nuctech Company Limited
发明人： Zhiqiang Chen , Yuanjing Li , Ziran Zhao , Shuo Wang , Jianping Gu , Yunda Sun
IPC分类号： G06T19/20 , G06T15/08 , G06T17/00 , G06T7/00 , G06T15/06 , G06T15/10
CPC分类号： G06T19/20 , G06T7/0012 , G06T15/06 , G06T15/08 , G06T15/10 , G06T17/005 , G06T2207/10136 , G06T2210/12 , G06T2219/2021
摘要： The present disclosure provides method and apparatus for marking a target in a 3D image. The method include steps of: acquiring Computed Tomography (CT) image data of a scene; rendering a 3D image of the scene using ray casting based on the CT image data; removing a transparent region from the 3D image based on a fixed 2D transfer function; and marking the target in the 3D image.

15. 发明授权

US09869775B2 Method for processing ceramic scintillator array 有权
公开(公告)号：US09869775B2
公开(公告)日：2018-01-16
申请号：US14983411
申请日：2015-12-29
申请人： Tsinghua University , Nuctech Company Limited
发明人： Yanchun Wang , Qingjun Zhang , Yuanjing Li , Zhiqiang Chen , Ziran Zhao , Yinong Liu , Yaohong Liu , Jianping Chang , Wenjian Zhang , Shuqing Zhao , Xiang Zou , Yongqiang Wang
IPC分类号： G01T1/202 , G01T1/20
CPC分类号： G01T1/2018
摘要： A method for processing a ceramic scintillator array, characterized in that, comprising the following steps: (a) forming, in a first direction, a predetermined number of straight first-direction through-cuts which are parallel to each other and spaced from each other on a scintillator substrate by using laser; (b) adequately filling the first-direction through-cuts with an adhesive and solidifying the adhesive; (c) forming, in a second direction. a predetermined number of second direction through-cuts which are parallel to each other at a predetermined interval on the scintillator substrate by using laser, wherein the second direction is perpendicular to the first direction; and (d) adequately filling the second direction through-cuts with the adhesive and solidifying the adhesive bond.

16. 发明授权

US09816028B2 Process for the preparation of gadolinium oxysulfide (Gd2O2S) scintillation ceramics 有权
公开(公告)号：US09816028B2
公开(公告)日：2017-11-14
申请号：US14827258
申请日：2015-08-14
申请人： Tsinghua University , Nuctech Company Limited
发明人： Yanchun Wang , Qingjun Zhang , Yuanjing Li , Zhiqiang Chen , Ziran Zhao , Yinong Liu , Yaohong Liu , Jianping Chang , Shuqing Zhao , Wenjian Zhang , Yongqiang Wang
IPC分类号： B32B27/32 , C04B33/32 , C04B35/50 , C04B35/645 , B28B1/00 , B28B5/00 , B28B3/00 , C09K11/77 , C04B40/00 , C04B35/515 , C04B35/547 , C04B35/626 , C04B35/64
CPC分类号： C09K11/7772 , C04B35/5156 , C04B35/547 , C04B35/6261 , C04B35/64 , C04B35/645 , C04B35/6455 , C04B40/0007 , C04B2235/3203 , C04B2235/3224 , C04B2235/3229 , C04B2235/3287 , C04B2235/445 , C04B2235/5436 , C04B2235/5481 , C04B2235/6565 , C04B2235/6567 , C04B2235/6581 , C04B2235/661 , C04B2235/662 , C04B2235/666 , C04B2235/72 , C04B2235/77 , C04B2235/9653
摘要： The present disclosure is directed to a rapid process for the preparation of gadolinium oxysulfide having a general formula of Gd2O2S, referred to as GOS, scintillation ceramics by using the combination of spark plasma primary sintering (SPS) and hot isostatic pressing secondary sintering.

17. 发明授权

US09786465B2 Apparatuses and methods for generating distributed x-rays 有权
公开(公告)号：US09786465B2
公开(公告)日：2017-10-10
申请号：US14136362
申请日：2013-12-20
申请人： TSINGHUA UNIVERSITY , NUCTECH COMPANY LIMITED
发明人： Yuanjing Li , Yaohong Liu , Jinsheng Liu , Huaping Tang , Chuanxiang Tang , Huaibi Chen , Xinshui Yan
IPC分类号： H01J35/14 , H01J35/30
CPC分类号： H01J35/14 , H01J35/16 , H01J35/30 , H01J2235/16
摘要： An apparatus and method to generate distributed x-rays. A hot cathode of an electron gun is used in vacuum to generate electron beams having certain initial movement energy and speed. Periodic scanning is performed with the initial low-energy electron beams, which are thus caused to be reciprocally deflected. A current-limiting device is provided in the travel path of the electron beams along the direction of the reciprocal deflection. Through holes arranged in an array on the current-limiting device, only part of the electron beams targeting specific positions can pass to form sequential electron beam currents distributed in an array. These electron beam currents are accelerated by a high-voltage electric field to obtain high energy, bombard an anode target, and thus sequentially generate corresponding focus spots and x-rays distributed in an array at the anode target.

18. 发明授权

US09632041B2 Computed tomography device based on straight trajectory and X-ray imaging device 有权
公开(公告)号：US09632041B2
公开(公告)日：2017-04-25
申请号：US14494301
申请日：2014-09-23
申请人： NUCTECH COMPANY LIMITED , Tsinghua University
发明人： Mingliang Li , Zhiqiang Chen , Yuanjing Li , Jianmin Li , Li Zhang
IPC分类号： A61B6/02 , G01N23/04 , A61B6/03 , G21K1/02 , G01T1/29 , A61B6/06
CPC分类号： G01N23/046 , A61B6/032 , A61B6/035 , A61B6/06 , G01N2223/3301 , G01T1/2985 , G21K1/025
摘要： A straight trajectory CT device can be used in radiation imaging. The device includes: a ray-generating unit that generates a ray within a specific range of field angle; a channel for an object to be inspected though which the object to be inspected passes; a first collimator; and a ray receiving unit provided on both sides of the channel for the object to be inspected. The ray beam is received by the ray receiving unit after penetrating the first collimator and the object to be inspected in order. The ray generating unit is static and the first collimator moves in the same direction as the ray receiving unit. This direction is parallel to the channel for the object to be inspected. The device can complete computed tomography with a minimum of one ray receiving unit, thereby simplifying the structure of the device and reducing its cost.

19. 发明授权

US09121811B2 Method and device for inspection of liquid articles 有权
标题翻译：液体制品检验方法及装置
公开(公告)号：US09121811B2
公开(公告)日：2015-09-01
申请号：US13946498
申请日：2013-07-19
申请人： Tsinghua University , Nuctech Company Limited
发明人： 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分类号： A61B6/00 , G01N23/10 , G01N23/04 , G01V5/00 , G01N1/02 , A61B6/02
CPC分类号： G01N23/10 , A61B6/027 , G01N23/046 , G01N2001/022 , G01N2223/419 , G01N2223/423 , G01N2223/637 , G01N2223/639 , G01V5/00
摘要： 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.
摘要翻译：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。

20. 发明授权

US09111128B2 Three-dimensional data processing and recognizing method 有权
标题翻译：三维数据处理和识别方法
公开(公告)号：US09111128B2
公开(公告)日：2015-08-18
申请号：US14136426
申请日：2013-12-20
申请人： NUCTECH COMPANY LIMITED , TSINGHUA UNIVERSITY
发明人： Mingliang Li , Zhiqiang Chen , Yuanjing Li , Li Zhang
IPC分类号： G06K9/00
CPC分类号： G06K9/00201 , G06K9/00771 , G06K2209/09
摘要： A three-dimensional data processing and recognizing method including scanning and re-constructing objects to be detected so as to obtain three-dimensional data for recognition of the objects to be detected; extracting data matching to features from the three-dimensional data, so that the extracted data constitutes an interested target; with respect to the data matching to features, merging and classifying adjacent data points as one group, to form an image of the merged interested target; recognizing a cross section of the interested target; cutting the interested targets by a perpendicular plane which passes through a central point of the cross section and is perpendicular to it, in order to obtain a graph; and recognizing shape of the interested targets based on a property of the graph.
摘要翻译：一种三维数据处理和识别方法，包括扫描和重新构造待检测对象，以获得用于识别待检测对象的三维数据; 从三维数据提取与特征匹配的数据，使提取的数据构成感兴趣的目标; 对于与特征匹配的数据，将相邻数据点合并和分类为一组，以形成合并的目标的图像; 认识到有兴趣的目标的横截面; 通过穿过横截面的中心点并垂直于其的垂直平面切割感兴趣的目标，以获得图形; 并基于图的属性识别感兴趣的目标的形状。

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