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    Fluoroscopic inspection method, device and storage medium for automatic classification and recognition of cargoes
    61.
    发明授权
    Fluoroscopic inspection method, device and storage medium for automatic classification and recognition of cargoes 有权

    公开(公告)号：US10122973B2

    公开(公告)日：2018-11-06

    申请号：US14580488

    申请日：2014-12-23

    Applicant: Nuctech Company Limited

    Inventor： Ziran Zhao ,  Yaohong Liu ,  Jianping Gu ,  Qiang Li ,  Jian Zhang

    IPC: G06T7/00 ,  H04N7/18 ,  G01V5/00 ,  G06K9/00 ,  G06K9/46

    Abstract: The present disclosure relates to a fluoroscopic inspection system for automatic classification and recognition of cargoes. The system includes: an image data acquiring unit, configured to perform scanning and imaging for a container by using an X-ray scanning device to acquire a scanned image; an image segmenting unit, configured to segment the scanned image into small regions each having similar gray scales and texture features; a feature extracting unit, configured to extract features of the small regions; a training unit, configured to generate a classifier according to annotated images; and a classification and recognition unit, configured to recognize the small regions by using the classifier according to the extracted features, to obtain a probability of each small region pertaining to a certain category of cargoes, and merge small regions to obtain large regions each representing a category.

    SCAN METHOD, SCAN SYSTEM AND RADIATION SCAN CONTROLLER
    63.
    发明申请
    SCAN METHOD, SCAN SYSTEM AND RADIATION SCAN CONTROLLER 审中-公开

    公开(公告)号：US20170299762A1

    公开(公告)日：2017-10-19

    申请号：US15289206

    申请日：2016-10-10

    Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

    Inventor： Kejun Kang ,  Yaohong Liu ,  Ziran Zhao ,  Wei Jia ,  Jianping Gu ,  Chuanxiang Tang ,  Huaibi Chen ,  Jianjun Gao ,  Wei Yin ,  Xiying Liu

    IPC: G01V5/00 ,  G01N23/04

    CPC classification number: G01V5/0016 ,  G01N23/04 ,  G01T1/29

    Abstract: This invention provides a scan method, scan system and radiation scan controller, and relates to the field of radiation. Wherein, the scan method of this invention comprises: obtaining detection data of an object to be inspected under radiation scanning using a detector; adjusting an accelerator output beam dose rate and/or an output electron beam energy level of a radiation emission device according to the detection data. With this method, working conditions of the accelerator of the radiation emission device may be adjusted according to the detection data detected by the detector, so that for a region having a larger mass thickness, a higher output beam dose rate or a higher electron beam output energy level is adopted to guarantee satisfied imaging technical indexes, for a region having a smaller mass thickness, a lower output beam dose rate or a lower electron beam output energy level is adopted to reduce the environmental dose level while guaranteeing satisfied imaging technical indexes.

    RAY CALIBRATION DEVICE AND OPERATING METHOD THEREOF, AND RADIATION IMAGING SYSTEM AND OPERATING METHOD THEREOF
    64.
    发明申请
    RAY CALIBRATION DEVICE AND OPERATING METHOD THEREOF, AND RADIATION IMAGING SYSTEM AND OPERATING METHOD THEREOF 审中-公开

    公开(公告)号：US20170184513A1

    公开(公告)日：2017-06-29

    申请号：US15281038

    申请日：2016-09-29

    Applicant: NUCTECH COMPANY LIMITED

    Inventor： Zhiqiang Chen ,  Yumei Chen ,  Yaohong Liu ,  Xinshui Yan ,  Weiqiang Guan ,  Wei Yin

    IPC: G01N23/04

    Abstract: The present disclosure provides a ray calibration device and a working method thereof, and a radiation imaging system and a working method thereof, and belongs to the field of radiation imaging technology. The present disclosure can solve the problems that the existing calibration devices have low calibration efficiency and require relatively large spaces. The ray calibration device of the present disclosure includes a driving part, a cam part and a calibration part, wherein the calibration part is located below the cam part; the driving part is adapted to drive the cam part to rotate; and the cam part is adapted to exert a force on the calibration part to enable the calibration part to move into a ray area downwards.

    SAMPLING DEVICE AND GAS CURTAIN GUIDE
    66.
    发明申请
    SAMPLING DEVICE AND GAS CURTAIN GUIDE 审中-公开
    采样装置和气帘指南

    公开(公告)号：US20160356679A1

    公开(公告)日：2016-12-08

    申请号：US15238598

    申请日：2016-08-16

    Applicant: Nuctech Company Limited

    Inventor： Qingjun Zhang ,  Yuanjing Li ,  Zhiqiang Chen ,  Huishao He ,  Qiufeng Ma ,  Ziran Zhao ,  Yinong Liu ,  Yaohong Liu ,  Weiping Zhu ,  Xiang Zou ,  Jianping Chang

    IPC: G01N1/24 ,  G01N30/30

    CPC classification number: G01N1/24 ,  G01N1/2211 ,  G01N30/30

    Abstract: A sampling device and a gas curtain guide are disclosed. In one aspect, the sampling device includes a chamber body. The chamber body includes a sample inlet, located at a first end of the chamber body, configured for suction of a sample. The chamber body further includes a sample outlet, located adjacent to a second end opposite to the first end of the chamber body, configured to discharge the sample. The chamber body further includes a gas inflation inlet, in a wall of the chamber body, configured to introduce a swirl gas flow into the chamber body. The chamber body further includes a gas exhaust opening configured to discharge gas so as to, together with the gas inflation inlet, generate a tornado type gas flow in the chamber body, which moves spirally from the first end to the second end of the chamber body.

    Abstract translation: 公开了一种采样装置和气幕导引装置。 在一个方面，采样装置包括室主体。 腔体包括位于腔室主体的第一端处的样品入口，其构造成用于抽吸样品。 腔室主体还包括样品出口，其位于与腔体主体的第一端相对的第二端附近，被配置为排出样品。 腔室主体还包括气室充气入口，其在腔室主体的壁中，构造成将旋流气流引入腔体。 室体还包括排气口，该气体排出口被构造成排出气体，以便与气体充气入口一起在室主体中产生龙卷风型气流，其从室主体的第一端至第二端螺旋地移动 。

    APPARATUS AND METHOD FOR VOLTAGE ALTERNATING PULSE OUTPUT
    69.
    发明申请
    APPARATUS AND METHOD FOR VOLTAGE ALTERNATING PULSE OUTPUT 有权
    电压交替脉冲输出的装置和方法

    公开(公告)号：US20140077619A1

    公开(公告)日：2014-03-20

    申请号：US14116074

    申请日：2012-12-28

    Applicant: Tsinghua University ,  Nuctech Company Limited

    Inventor： Yaohong Liu ,  Chuanxiang Tang ,  Xinshui Yan ,  Wei Jia ,  Jianjun Gao ,  Jinsheng Liu ,  Wei Yin ,  Xiying Liu ,  Hao Shi

    IPC: H03K3/57

    CPC classification number: H03K3/57 ,  H02M1/088 ,  H02M2003/077 ,  H03K3/64

    Abstract: The present invention provides a high voltage pulse modulating power source based on alternate group triggering, which comprises: a DC stabilized voltage source for supplying power to the high voltage pulse modulating power source; a plurality of solid-state switches; a plurality of triggers corresponding to said plurality of solid-state switches, wherein each trigger provides a trigger signal to its corresponding solid-state switch to turn on said corresponding solid-state switch, wherein said plurality of triggers are divided into at least two groups of triggers; a time sequence control module, which, at time t1, controls said plurality of triggers to generate trigger signals so as to turn on said plurality of solid-state switches simultaneously, and at time t2, controls one group of said at least two groups of triggers to generate trigger signals to turn on solid-state switches corresponding to this group of triggers, wherein time t1 and time t2 appear alternately.

    Abstract translation: 本发明提供一种基于交替组触发的高电压脉冲调制电源，包括：用于向高电压脉冲调制电源供电的直流稳压电压源; 多个固态开关; 与所述多个固态开关相对应的多个触发器，其中每个触发器向其对应的固态开关提供触发信号以打开所述对应的固态开关，其中所述多个触发器被分成至少两个组 的触发器 时间控制模块，其在时间t1控制所述多个触发器以产生触发信号，以同时接通所述多个固态开关，并且在时间t2，控制一组所述至少两组 触发器产生触发信号以打开与该组触发相对应的固态开关，其中时间t1和时间t2交替出现。

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