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    CT INSPECTION SYSTEM AND CT IMAGING METHOD
    14.
    发明申请
    CT INSPECTION SYSTEM AND CT IMAGING METHOD 审中-公开

    公开(公告)号：US20190204243A1

    公开(公告)日：2019-07-04

    申请号：US16234625

    申请日：2018-12-28

    Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

    Inventor： Kejun KANG ,  Jianmin LI ,  Xiulin NI ,  Yulan LI ,  Yuanjing LI ,  Zhiqiang CHEN ,  Li ZHANG ,  Liang LI ,  Xiang ZOU ,  Weifeng YU ,  Hejun ZHOU ,  Chunguang ZONG

    IPC: G01N23/046

    CPC classification number: G01N23/046 ,  G01N2223/33 ,  G01V5/005

    Abstract: The present disclosure relates to the technical field of CT detection, and in particular to a CT inspection system and a CT imaging method. The CT inspection system provided by the present disclosure comprises a radioactive source device, a detection device, a rotation monitoring device and an imaging device, wherein the detection device obtains detection data at a frequency that is N times a beam emitting frequency of the radioactive source device; the rotation monitoring device detects a rotation angle of the detection device and transmits a signal to the imaging device each time the detection device rotates by a preset angle; the imaging device determines a rotational position of the detection device each time the radioactive source device emits a beam according to the signal transmitted by the rotation monitoring device and the detection data of the detection device.

    METHOD AND SYSTEM FOR ESTIMATING POINT SPREAD FUNCTION
    16.
    发明申请
    METHOD AND SYSTEM FOR ESTIMATING POINT SPREAD FUNCTION 审中-公开
    用于估计点传播功能的方法和系统

    公开(公告)号：US20170024862A1

    公开(公告)日：2017-01-26

    申请号：US15217613

    申请日：2016-07-22

    Applicant: Tsinghua University ,  Nuctech Company Limited

    Inventor： Kejun KANG ,  Zhiqiang CHEN ,  Yuanjing LI ,  Li ZHANG ,  Ziran ZHAO ,  Yaohong LIU ,  Jianping GU ,  Zhiming WANG

    IPC: G06T5/00 ,  G06T7/40 ,  G06T7/00

    CPC classification number: G06T5/003 ,  G06T7/00 ,  G06T2207/10116 ,  G06T2207/20021 ,  G06T2207/20076 ,  G06T2207/30168

    Abstract: 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.

    Abstract translation: 本公开涉及一种用于估计点扩散函数的方法和装置。 在一个实现中，一种方法包括通过扫描与尺寸相同并且紧密排列的多个矩形块来扫描图像，其中多个矩形块由不同的材料制成和/或具有不同的质量厚度， 并且光线的入射方向垂直于扫描方向，并且所述多个矩形块的表面在扫描期间被紧密排列; 基于扫描图像，沿矩形块的长度侧和宽度侧的两个方向获得线扩展函数，并获得线扩展函数的标准偏差参数; 并组合两个方向的标准偏差参数以获得二维点扩展函数（PSF）参数，以估计点扩散函数。

    PHOTOGRAMMETRY SYSTEM AND PHOTOGRAMMETRY METHOD
    17.
    发明申请
    PHOTOGRAMMETRY SYSTEM AND PHOTOGRAMMETRY METHOD 审中-公开
    照相系统和照相术方法

    公开(公告)号：US20160253822A1

    公开(公告)日：2016-09-01

    申请号：US14981947

    申请日：2015-12-29

    Applicant: NUCTECH COMPANY LIMITED

    Inventor： Mingliang LI ,  Yuanjing LI ,  Jianmin Li ,  Ying LI ,  Zhiqiang CHEN ,  Kejun KANG

    IPC: G06T7/20 ,  H04N5/247

    CPC classification number: H04N5/247 ,  G01B11/04 ,  G01C11/06 ,  G01P3/68 ,  G06T7/292 ,  G06T7/60 ,  G06T2207/10016 ,  G06T2207/30236 ,  G06T2207/30248

    Abstract: The present invention relates to a photogrammetry system and method. The photogrammetry system comprises: photographing devices capable of photographing an object at a predetermined time interval; and, a data processing device capable of calculating an actual length of the object or a certain portion on the object according to a length of the object or a certain portion on the object in the images obtained by the photographing devices and a distance of the object in the two images, wherein the object moves at a speed V; the photographing devices photograph the object for two times at a time interval t; the distance of the object in the two images obtained by the two times of photographing is Dp; the length of the object or a certain portion on the object in the images is Lp; and, the actual length L of the object or a certain portion on the object may be obtained by the following formula: L = Lp × Vt Dp .

    Abstract translation: 本发明涉及摄影测量系统和方法。 摄影测量系统包括：拍摄能够以预定时间间隔拍摄对象的装置; 以及数据处理装置，其能够根据由拍摄装置获得的图像中的物体或物体上的某一部分的长度和物体的距离来计算物体或物体上的某一部分的实际长度 在两个图像中，其中物体以速度V移动; 拍摄装置以时间间隔t拍摄对象两次; 通过两次拍摄获得的两张图像中的物体的距离为Dp; 图像中对象或对象上某一部分的长度为Lp; 并且物体的实际长度L或物体上的某个部分可以通过以下公式获得：L = Lp×Vt Dp。

    LOW-ANGLE SELF-SWINGING, LARGE-SCALE MULTI-SLICE SPIRAL COMPUTED TOMOGRAPHY APPARATUS AND INSPECTION METHOD
    18.
    发明申请
    LOW-ANGLE SELF-SWINGING, LARGE-SCALE MULTI-SLICE SPIRAL COMPUTED TOMOGRAPHY APPARATUS AND INSPECTION METHOD 审中-公开
    低角度自动扫描，大规模多层螺旋计算机图像检测和检测方法

    公开(公告)号：US20160084775A1

    公开(公告)日：2016-03-24

    申请号：US14837205

    申请日：2015-08-27

    Applicant: Tsinghua University ,  Nuctech Company Limited

    Inventor： Kejun KANG ,  Zhiqiang CHEN ,  Yuanjing LI ,  Li ZHANG ,  Ziran ZHAO ,  Yaohong LIU ,  Jianping GU ,  Liang LI ,  Yuxiang XING

    IPC: G01N23/04

    CPC classification number: G01N23/046 ,  G01V5/005

    Abstract: The present disclosure provides a low-angle self-swinging type computed tomography (CT) apparatus, which is provided with an X-ray accelerator and a plurality of rows of detectors and is configured to include 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 objected to be inspected passes through the slip ring, a three dimension CT image of the object is displayed, thereby achieving accurate inspection for large-scale objects, such as van containers.

    Abstract translation: 本公开提供了一种低角度自摆式计算机断层摄影（CT）装置，其设置有X射线加速器和多排检测器，并且构造成包括滑环，使得滑环具有 加速器和其上的检测器能够在被检查对象通过滑环的同时执行单摆往复运动，显示对象的三维CT图像，从而实现对大型物体的精确检查，例如 作为集装箱。

    VEHICLE-MOUNTED INSPECTION SYSTEM
    19.
    发明申请
    VEHICLE-MOUNTED INSPECTION SYSTEM 有权
    车辆安装检查系统

    公开(公告)号：US20160061989A1

    公开(公告)日：2016-03-03

    申请号：US14841991

    申请日：2015-09-01

    Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

    Inventor： Kejun KANG ,  Jingyu GU ,  Zhiqiang CHEN ,  Jianmin LI ,  Yuanjing LI ,  Yulan LI ,  Dongyu WANG

    IPC: G01V5/00

    CPC classification number: G01V5/0066 ,  G01V5/0016

    Abstract: A vehicle-mounted inspection system comprises: a chassis; a rotation mechanism disposed on the chassis; a first ray emission device connected to the rotation mechanism and configured to emit a ray; a first detection device connected to the rotation mechanism and configured to receive the ray emitted by the first ray emission device; and a second ray emission device connected to the rotation mechanism and configured to emit a ray. The rotation mechanism is configured to rotate the first ray emission device, the first detection device and the second ray emission device substantially around an upright axis between a retracted position and an operating position.

    Abstract translation: 车载检查系统包括：底盘; 设置在所述底盘上的旋转机构; 连接到所述旋转机构并被配置为发射光线的第一射线发射装置; 连接到所述旋转机构并被配置为接收由所述第一射线发射装置发射的射线的第一检测装置; 以及连接到所述旋转机构并被配置为发射光线的第二射线发射装置。 旋转机构构造成使第一射线发射装置，第一检测装置和第二射线发射装置基本上在缩回位置和操作位置之间的直立轴线周围旋转。

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