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1. 发明申请

US20180075938A1 GRATING AND RADIATION IMAGING DEVICE 审中-公开
公开(公告)号：US20180075938A1
公开(公告)日：2018-03-15
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： G21K1/06 , 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.

2. 发明申请

US20150378047A1 DETECTOR DEVICE, DUAL ENERGY CT SYSTEM AND DETECTION METHOD USING THE SYSTEM 有权
标题翻译：检测器装置，双能量CT系统和使用该系统的检测方法
公开(公告)号：US20150378047A1
公开(公告)日：2015-12-31
申请号：US14748407
申请日：2015-06-24
申请人： Tsinghua University , Nuctech Company Limited
发明人： Zhiqiang CHEN , Li ZHANG , Xin JIN , Qingping HUANG , Le SHEN , Yunda SUN
IPC分类号： G01V5/00 , G01T7/08
CPC分类号： G01V5/0041 , A61B6/4266 , G01T1/202 , G01T1/362 , G01T7/08 , G01V5/005
摘要： The present disclosure discloses a detector device comprising a plurality of detector assemblies. Each detector assembly comprises at least one detection crystal units having a first energy response and those having a second energy response, which are both arranged along a first direction at intervals, each detection crystal unit having a first/second energy response including at least one detection crystals having a first/second energy response arranged along a second direction. The at least one detection crystal units having a first energy response and the at least one detection crystal units having a second energy response are, at least partially, alternatively arranged along the first direction when viewed from an incidence direction of the X-ray. The present disclosure also discloses a dual energy CT system having the detector device and a CT detection method using this system.
摘要翻译：本公开公开了一种包括多个检测器组件的检测器装置。每个检测器组件包括具有第一能量响应的至少一个检测晶体单元和具有第二能量响应的检测晶体单元，它们都沿着第一方向间隔排列，每个检测晶体单元具有包括至少一个检测的第一/第二能量响应具有沿第二方向布置的第一/第二能量响应的晶体。当从X射线的入射方向观察时，具有第一能量响应的至少一个检测晶体单元和具有第二能量响应的至少一个检测晶体单元至少部分地沿第一方向布置。本公开还公开了一种具有检测器装置和使用该系统的CT检测方法的双能CT系统。

3. 发明申请

US20150185357A1 MULTI-SPECTRAL STATIC CT APPARATUSES 有权
标题翻译：多光谱静态CT设备
公开(公告)号：US20150185357A1
公开(公告)日：2015-07-02
申请号：US14577069
申请日：2014-12-19
申请人： Tsinghua University , Nuctech Company Limited
发明人： Zhiqiang CHEN , Li ZHANG , Qingping HUANG , Yunda SUN , Xin JIN , Tao YANG , Le SHEN , Ji ZHAO
IPC分类号： G01V5/00 , G01N23/04
CPC分类号： G01V5/0041 , G01N23/046 , G01T1/2985 , G01V5/005
摘要： Multi-spectral static CT apparatuses are disclosed. The apparatus includes a ray source in a form of multiple distributed spots, multiple columns of detectors, a data acquisition device, an article carrying and control device, and a multi-spectral projection data processing device. An object of the present disclosure is to combine static CT scanning technology with multi-spectral analysis technology. It has an advantage of a static CT system, such as high scanning speed, simple mechanic structure, and/or cost reduction due to omission of slip ring. It also can perform identification of material in an article, and can be widely applied in occasions such as safety inspection, and smuggling suppression at customs.
摘要翻译：公开了多光谱静态CT装置。该装置包括多个分布点的形式的射线源，多列检测器，数据采集装置，物品携带和控制装置以及多光谱投影数据处理装置。本公开的目的是将静态CT扫描技术与多光谱分析技术相结合。它具有静电CT系统的优点，如扫描速度快，机械结构简单，和/或由于省略滑环而降低成本。也可以在物品中进行材料鉴定，并可广泛应用于安全检查，海关走私等场合。

4. 发明申请

US20140185742A1 3-DIMENSIONAL MODEL CREATION METHODS AND APPARATUSES 有权
标题翻译：三维建模方法和设备
公开(公告)号：US20140185742A1
公开(公告)日：2014-07-03
申请号：US14138447
申请日：2013-12-23
申请人： Nuctech Company Limited , Tsinghua University
发明人： Zhiqiang CHEN , Li ZHANG , Ziran ZHAO , Qiang LI , Jianping GU , Qingping HUANG
IPC分类号： G01V5/00 , G06T17/00
CPC分类号： G01V5/005 , G06K9/00214 , G06K2209/09 , G06T7/11 , G06T7/187 , G06T17/00 , G06T2207/10081 , G06T2207/30112
摘要： Disclosed are methods and apparatuses for creating a 3-Dimensional model for objects in an inspected luggage in a CT system. The method includes acquiring slice data of the luggage with the CT system; interpolating the slice data to generate 3D volume data of the luggage; performing unsupervised segmentation on the 3D volume data of the luggage to obtain a plurality of segmental regions; performing isosurface extraction on the plurality of segmental regions to obtain corresponding isosurfaces; and performing 3D surface segmentation on the isosurfaces to form a 3D model for the objects in the luggage. The above solutions can create a 3D model for objects in the inspected luggage in a relatively accurate manner, and thus provide better basis for subsequent shape feature extraction and security inspection, and reduce omission factor.
摘要翻译：公开了用于在CT系统中检查的行李中的物体创建三维模型的方法和装置。该方法包括采用CT系统获取行李的切片数据; 内插切片数据以生成行李的3D体积数据; 对行李的3D体积数据执行无监督分割以获得多个分段区域; 在多个分段区域进行等值面提取以获得相应的等值面; 并在等面上执行3D表面分割，以形成行李中物体的3D模型。上述解决方案可以以相对准确的方式为被检查行李中的对象创建3D模型，从而为随后的形状特征提取和安全检查提供更好的依据，并减少遗漏因素。

5. 发明申请

US20210082221A1 SMART LOCK, SMART MONITORING SYSTEM AND SMART MONITORING METHOD 有权
公开(公告)号：US20210082221A1
公开(公告)日：2021-03-18
申请号：US17017967
申请日：2020-09-11
申请人： NUCTECH COMPANY LIMITED , Tsinghua University
发明人： Li ZHANG , Gang PENG , Qingping HUANG , Liang LI , Fan YANG , Jiabao CHEN , Kun CHENG , Zhifeng HE
IPC分类号： G07C9/29 , G07C9/00 , G07C9/20
摘要： The present disclosure provides a smart lock, including: a lock body and an unlocking structure; a Bluetooth communication module configured to receive a lock instruction or an unlock instruction based on Bluetooth communication; and one or more binding tags, each binding tag being associated with a Bluetooth address of the smart lock, wherein the unlocking structure is configured to lock or unlock the smart lock based on the lock instruction or the unlock instruction, or lock or unlock the smart lock based on an operation performed for the one or more binding tags. The present disclosure further provides a system and method for monitoring an object equipped with the smart lock.

6. 发明申请

US20190094407A1 SCANNING IMAGING SYSTEM FOR SECURITY INSPECTION OF AN OBJECT AND IMAGING METHOD THEREOF 审中-公开
公开(公告)号：US20190094407A1
公开(公告)日：2019-03-28
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： G01V5/00 , G01N23/046
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.

7. 发明申请

US20150199804A1 CT SYSTEMS AND METHODS THEREOF 有权
标题翻译： CT系统及其方法
公开(公告)号：US20150199804A1
公开(公告)日：2015-07-16
申请号：US14576705
申请日：2014-12-19
申请人： Tsinghua University , Nuctech Company Limited
发明人： Zhiqiang CHEN , Li ZHANG , Ji ZHAO , Qingping HUANG , Xin JIN
IPC分类号： G06T7/00
CPC分类号： G06T7/0002 , G01V5/005 , G06T2207/30112
摘要： A CT system and method thereof are discloses. The system includes: a fixed multi-plane multi-source X-ray generation device and a control system thereof that provide X-ray source used in luggage inspection; a single-energy, pseudo-dual-energy or spectral detector system and data transfer system that receive perspective data of X ray penetrating the luggage, and transfer the data to a computer for processing; a conveyor and a control system thereof that control a speed for moving the luggage forth and back, and perform tomogram scanning; and a host computer system that performs tomogram reconstruction and provides man-machine interaction. The system takes full advantage of characteristics, such as high speed and stability, brought by the distributed ray sources which replace the normal slip ring technology. The system also adopts the idea of inverse-geometry CT, and reduces detector area and cost by increasing the number of ray sources. With the reduction of detector area, cone-beam artifacts and cup-shape artifacts caused by scattering are also reduced, and influence of the oblique effect on registration of dual-energy data is suppressed.
摘要翻译：公开了一种CT系统及其方法。该系统包括：提供行李检查中使用的X射线源的固定多平面多源X射线产生装置及其控制系统; 单能量，伪双能量或光谱检测器系统和数据传输系统，其接收穿透行李的X射线的透视数据，并将数据传送到计算机进行处理; 输送机及其控制系统，其控制行李前后移动的速度，并执行断层图像扫描; 以及执行断层图像重建并提供人机交互的主计算机系统。系统充分利用了代替普通滑环技术的分布式射线源带来的高速度，稳定性等特点。该系统还采用反几何CT的思想，通过增加射线源数量，减少探测器面积和成本。随着检测器面积的减小，散射引起的锥束伪影和杯形伪影也减少，并且斜率对双能数据配准的影响受到抑制。

8. 发明申请

US20170285218A1 METHOD AND DEVICE FOR OPERATING CT-BASED THREE-DIMENSIONAL IMAGE USED FOR SECURITY INSPECTION 审中-公开
公开(公告)号：US20170285218A1
公开(公告)日：2017-10-05
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： G01V5/00 , G06T7/90 , G06T7/40 , G06T7/50 , G01N23/04 , G06T7/00
CPC分类号： G01V5/005 , G01N23/04 , G01N23/046 , G06T7/0002 , G06T7/40 , G06T7/50 , G06T7/90 , G06T2207/10072
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.

9. 发明申请

US20160321816A1 METHODS FOR EXTRACTING SHAPE FEATURE, INSPECTION METHODS AND APPARATUSES 审中-公开
标题翻译：提取形状特征的方法，检验方法和装置
公开(公告)号：US20160321816A1
公开(公告)日：2016-11-03
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： G06T7/00 , G06T7/60 , G06K9/62 , G06T11/00
CPC分类号： G06T7/596 , G06K9/00201 , G06K9/00523 , G06K9/00536 , G06K9/6215 , G06K9/627 , G06K2209/09 , G06T7/0004 , G06T7/68 , G06T11/008 , G06T2207/10081 , G06T2207/30112 , G06T2211/408
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.
摘要翻译：用于提取对象的形状特征的方法和安全检查方法和装置。使用CT可以获得3D结构。检查行李中的物体的形状被用作可疑物体的特征，与物体的材料属性相结合。例如，可能会减少检测可疑炸药的误报率。

10. 发明申请

US20140320855A1 RAMAN SPECTROSCOPY METHOD OF MEASURING MELAMINE CONTENTS IN DAIRY PRODUCTS HAVING DIFFERENT MATRIXES 有权
标题翻译：拉曼光谱法测定具有不同基质的奶制品中的麦芽糖含量
公开(公告)号：US20140320855A1
公开(公告)日：2014-10-30
申请号：US14145454
申请日：2013-12-31
申请人： Tsinghua University , Nuctech Company Limited
发明人： Zhiqiang CHEN , Li ZHANG , Jianhong ZHANG , Hongqiu WANG , Ziran ZHAO , Jianping GU , Zhiming WANG , Qingping HUANG , Yumin YI
IPC分类号： G01N21/65
CPC分类号： G01N21/65
摘要： A raman spectroscopy method of measuring melamine contents in dairy products having different matrixes. The method includes: (a) establishing a database of characteristic curves of dairy products having different matrixes; (b) taking several copies of the dairy products having one certain unknown matrix and adding melamine standard solutions having different concentrations therein, to obtain a series of dairy product samples in which the relative concentrations of the melamine are known; (c) performing raman spectrum testing analysis and obtaining corresponding characteristic peak intensities to obtain a slope of the characteristic curve showing variation of the characteristic peak intensities with the relative concentrations of the melamine; (d) searching the database of step (a) using the slope of the characteristic curve of the dairy product samples to find a matching characteristic curve, and (e) calculating concentration of melamine in the dairy products by using the matched characteristic curve and the characteristic peak intensity.
摘要翻译：测量具有不同基质的乳制品中三聚氰胺含量的拉曼光谱法。该方法包括：（a）建立具有不同矩阵的乳制品特征曲线数据库; （b）取几份具有一定未知基质的乳制品，并加入其中浓度不同的三聚氰胺标准溶液，以获得其中已知三聚氰胺的相对浓度的一系列乳制品样品; （c）进行拉曼光谱测试分析并获得相应的特征峰强度，以获得特征曲线的斜率，显示特征峰强度与三聚氰胺的相对浓度的变化; （d）使用奶制品样本的特征曲线的斜率来搜索步骤（a）的数据库，以找到匹配的特征曲线，以及（e）通过使用匹配的特征曲线计算乳制品中三聚氰胺的浓度，特征峰强度。

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