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    Inspection devices and methods for inspecting a container
    21.
    发明授权
    Inspection devices and methods for inspecting a container 有权

    公开(公告)号：US10663413B2

    公开(公告)日：2020-05-26

    申请号：US15865520

    申请日：2018-01-09

    Applicant: Nuctech Company Limited ,  Tsinghua University

    Inventor： Qiang Li ,  Jianping Gu ,  Bin Xu ,  Yaohong Liu ,  Ziran Zhao

    IPC: G01N23/046 ,  G01V5/00 ,  G01N23/041

    Abstract: A method for inspecting a container and an inspection device are disclosed. X-ray scanning is performed on the inspected container to obtain a scanned image. The scanned image is processed to obtain a region of interest. Features of texture units included in the region of interest are calculated. Local descriptions of the texture units are formed based on the features of the texture units. Distinction of each local point is calculated from a local description of each of the texture units so as to obtain a local distinct map of the region of interest. It is determined whether there is an article which is secretly carried in the inspected container using the local distinct map.

    Sample collecting and introducing device and detection system
    22.
    发明授权
    Sample collecting and introducing device and detection system 有权

    公开(公告)号：US10520402B2

    公开(公告)日：2019-12-31

    申请号：US16232062

    申请日：2018-12-26

    Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

    Inventor： Qingjun Zhang ,  Yuanjing Li ,  Zhiqiang Chen ,  Ziran Zhao ,  Yinong Liu ,  Yaohong Liu ,  Ge Li ,  Biao Cao ,  Jingli Xie ,  Xiaolin Zhao ,  Qiufeng Ma

    IPC: G01N1/24 ,  G01N1/22 ,  G01N1/40 ,  G01N30/30

    Abstract: The present disclosure relates to the technical field of safety detection, and in particular to a sample collecting and introducing device and a detection system. The sample collecting and introducing device provided by the present disclosure includes a sampling device for collecting a sample, and a semipermeable membrane device for extracting the sample collected by the sampling device and conveying the extracted sample to detection equipment, wherein the sampling device is provided with an air guide cavity, the air guide cavity is configured to guide airflow carrying the sample to flow to the semipermeable membrane device, the semipermeable membrane device is provided with a semipermeable membrane which is arranged outside the sampling device. In the present disclosure, the size of the semipermeable membrane is no longer limited by the sampling device, and therefore the difficulty of increasing the area of the semipermeable membrane is reduced.

    Sample introduction device
    25.
    发明授权
    Sample introduction device 有权

    公开(公告)号：US10032616B2

    公开(公告)日：2018-07-24

    申请号：US14985219

    申请日：2015-12-30

    Applicant: Nuctech Company Limited

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

    IPC: G01N1/40 ,  G01N1/44 ,  G01N30/14 ,  G01N30/16 ,  G01N30/20 ,  H01J49/00 ,  B01D53/02 ,  B01D59/26 ,  B01D15/02 ,  H01J49/04

    Abstract: A sample introduction device comprises a sampling unit, a gas suction pump, adsorption units, a piston cylinder and a desorption cylinder that comprises a desorption chamber, a carrier-gas inlet, a split/purge vent and an analyzer nozzle communicating with the desorption chamber. A heating film and a temperature sensor are provided on outer wall of the desorption cylinder. The piston cylinder above the desorption cylinder comprises two piston chambers, each of which is provided with the adsorption unit and in communication with the desorption chamber. The piston cylinder comprises a sample-gas inlet connected to the sampling unit and a gas-suction-pump orifice connected to the gas suction pump, each of which can communicate with both piston chambers. Each adsorption unit comprises an adsorption cylinder-like screen for holding adsorbents and a piston rod slidably mounted in the piston chamber. Each adsorption cylinder-like screen can simultaneously communicate with the sample-gas inlet and gas-suction-pump orifice.

    Apparatus and method for voltage alternating pulse output
    27.
    发明授权
    Apparatus and method for voltage alternating pulse output 有权

    公开(公告)号：US09843313B2

    公开(公告)日：2017-12-12

    申请号：US14116074

    申请日：2012-12-28

    Applicant: Nuctech Company Limited ,  Tsinghua University

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

    IPC: H03K3/57 ,  H03K3/64 ,  H02M1/088 ,  H02M3/07

    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.

    Gas chromatograph-ion mobility spectrometer system
    30.
    发明授权
    Gas chromatograph-ion mobility spectrometer system 有权
    气相色谱 - 离子迁移谱系统

    公开(公告)号：US09513266B2

    公开(公告)日：2016-12-06

    申请号：US14577653

    申请日：2014-12-19

    Applicant: Nuctech Company Limited

    Inventor： Qingjun Zhang ,  Yuanjing Li ,  Zhiqiang Chen ,  Qiufeng Ma ,  Ziran Zhao ,  Yinong Liu ,  Yaohong Liu ,  Xiang Zou ,  Yanchun Wang ,  Junxiao Wang ,  Jianping Chang

    IPC: H01J49/00 ,  G01N30/72 ,  G01N27/62 ,  G01N27/64 ,  H01J49/04

    CPC classification number: G01N30/7206 ,  G01N27/622 ,  G01N27/64 ,  H01J49/0422

    Abstract: A GC-IMS system is disclosed. The system includes a sample transfer device. The sample transfer device connects the gas chromatograph to the reaction region and, the sample from the gas chromatograph is transferred to the reaction region by the sample transfer device. With the GC-IMS system, generation of sample molecular ion fragments can be avoided so that the spectrum is easily identified; moreover, the application field of the GC-IMS system is extended to a range of analysis of organic macromolecule samples which have a high polarity, are difficult to volatilize, and are thermally instable. On the other hand, the GC-IMS system overcomes the defect of ion destruction due to neutralization reaction among positive and negative ions so as to evade the detection.

    Abstract translation: 公开了一种GC-IMS系统。 该系统包括样品转移装置。 样品转移装置将气相色谱仪连接到反应区域，样品转移装置将样品从气相色谱仪转移到反应区域。 使用GC-IMS系统，可以避免样品分子离子片段的产生，从而可以容易地鉴定光谱; 此外，GC-IMS系统的应用领域扩展到具有高极性，难以挥发和热不稳定的有机大分子样品的分析范围。 另一方面，GC-IMS系统克服了由于正离子和负离子之间的中和反应引起的离子破坏的缺陷，以避免检测。

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