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    Method and device of determining distance and height based on a plurality of sensors
    101.
    发明授权
    Method and device of determining distance and height based on a plurality of sensors 有权

    公开(公告)号：US12029484B2

    公开(公告)日：2024-07-09

    申请号：US17286573

    申请日：2021-02-24

    Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

    Inventor： Zhiqiang Chen ,  Yuanjing Li ,  Xianghao Wu ,  Haitao Zhang ,  Jundi Dai ,  Shaozhi Zhao ,  Guocheng An

    IPC: A61B3/11 ,  A61B3/14

    CPC classification number: A61B3/112 ,  A61B3/14

    Abstract: The present disclosure provides a method of determining a distance and a height, including: measuring, a first distance, a second distance and a third distance from the security inspection device to the tested person as well as measuring a first height, a second height and a third height of the tested person; determining, a relationship between the first distance and a minimum distance threshold as well as a maximum distance threshold, a relationship between the second distance and the minimum distance threshold as well as the maximum distance threshold, and a relationship between the third distance and the minimum distance threshold as well as the maximum distance threshold; determining, a final distance from the security inspection device to the tested person and a final height of the tested person; and performing a pixel conversion and a size conversion on the pupil image of the tested person.

    SECURITY INSPECTION APPARATUS AND METHOD OF CONTROLLING THE SAME
    104.
    发明申请
    SECURITY INSPECTION APPARATUS AND METHOD OF CONTROLLING THE SAME 有权

    公开(公告)号：US20210325528A1

    公开(公告)日：2021-10-21

    申请号：US17304927

    申请日：2021-06-28

    Applicant: Tsinghua University ,  Nuctech Company Limited

    Inventor： Zhiqiang Chen ,  Yan You ,  Ziran Zhao ,  Xuming Ma ,  Kai Wang

    IPC: G01S13/88 ,  G01S13/89 ,  H01Q1/22

    Abstract: A security inspection apparatus and a method of controlling the same are described. An example security inspection apparatus includes a bottom plate configured to carry an inspected object and a two-dimensional multi-input multi-output array panel, including at least one two-dimensional multi-input multi-output sub-array. Each two-dimensional multi-input multi-output sub-array includes transmitting antennas and receiving antennas arranged such that equivalent phase centers are arranged in a two-dimensional array. The security inspection apparatus includes a control circuit configured to control the transmitting antennas to transmit a detection signal in a form of an electromagnetic wave to the inspected object in a preset order, and to control the receiving antennas to receive an echo signal from the inspected object. The security inspection apparatus includes a signal processing device configured to reconstruct an image of an inspected object based on an echo signal received and a display device configured to display the reconstructed image.

    SEMANTIC-BASED METHOD AND APPARATUS FOR RETRIEVING PERSPECTIVE IMAGE
    106.
    发明申请
    SEMANTIC-BASED METHOD AND APPARATUS FOR RETRIEVING PERSPECTIVE IMAGE 有权

    公开(公告)号：US20210286842A1

    公开(公告)日：2021-09-16

    申请号：US17202088

    申请日：2021-03-15

    Applicant: Tsinghua University ,  Nuctech Company Limited

    Inventor： Li Zhang ,  Zhiqiang Chen ,  Yuanjing Li ,  Yuxiang Xing ,  Fanhua Meng ,  Qiang Li ,  Wei Li ,  Gang Fu

    IPC: G06F16/583 ,  G06K9/00 ,  G06F16/55

    Abstract: A semantic-based method and apparatus for retrieving a perspective image, an electronic device and a computer-readable storage medium are provided. An method includes obtaining a perspective image for a space containing an inspected object therein. A semantic division on the perspective image is performed using a first method, to obtain a plurality of semantic region units. A feature extraction network is constructed using a second method. Based on the perspective image and each of the plurality of semantic region units, a feature of each semantic region unit is extracted using the feature extraction network. Based on the feature of each semantic region unit, an image most similar to the semantic region unit is retrieved from an image feature database, to assist in determining an inspected object in the semantic region unit.

    Fork-arm lift tractor
    107.
    发明授权
    Fork-arm lift tractor 有权

    公开(公告)号：US11104309B2

    公开(公告)日：2021-08-31

    申请号：US16233398

    申请日：2018-12-27

    Applicant: TSINGHUA UNIVERSITY ,  Nuctech Company Limited

    Inventor： Yuan He ,  Jianmin Li ,  Hongqi Li ,  Yulan Li ,  Qiangqiang Wang ,  Yuanjing Li ,  Zhiqiang Chen ,  Li Zhang

    IPC: B60S13/00 ,  B60S5/00 ,  B66F7/18 ,  B66F7/28 ,  B66F5/04 ,  B66F7/14 ,  B62D49/06 ,  B62D49/02

    Abstract: A fork-arm lift tractor includes a vehicle body, a supporting plate disposed above the vehicle body, a lifting device for driving the supporting plate to be lifted, a front and rear fork-arm assemblies, a front and rear fork-arm drive assemblies. The front fork-arm assembly includes two front fork-arms rotatably disposed at the supporting plate. The rear fork-arm assembly includes two rear fork-arms rotatably disposed at the supporting plate, and the front and rear fork-arms may be deployed or retracted from both sides of the supporting plate. The front fork-arm driving assembly includes a front transmission part, and a front power device disposed at the supporting plate and may drive the front transmission part to move horizontally linearly so as to rotate the two front fork-arms. The rear fork-arm driving assembly has almost the same structure of the front fork-arm driving assembly and is used to rotate the two rear fork-arms.

    Ray transmission and fluorescence CT imaging system and method
    109.
    发明授权
    Ray transmission and fluorescence CT imaging system and method 有权

    公开(公告)号：US10914693B2

    公开(公告)日：2021-02-09

    申请号：US16045243

    申请日：2018-07-25

    Applicant: Tsinghua University ,  NUCTECH COMPANY LIMITED

    Inventor： Liang Li ,  Zhiqiang Chen ,  Li Zhang ,  Ziran Zhao ,  Yuxiang Xing ,  Siyuan Zhang

    IPC: G01N23/00 ,  G01N23/2206 ,  G01N23/046 ,  G01N23/223 ,  A61B6/03 ,  A61B6/06 ,  A61B6/10 ,  A61B6/00

    Abstract: The present disclosure discloses a ray transmission and fluorescence CT imaging system and method. The system comprises: a ray source configured to emit a beam of rays; a rotational scanning device configured to perform rotational CT scanning on an object to be inspected; a transmission CT detector configured to receive the beam of rays which has passed through the object; a fluorescence CT detector configured to receive fluorescent photons excited by irradiation of the beam of rays on the object; a data acquisition unit configured to acquire a transmission data signal and a fluorescence data signal respectively; and a control and data processing unit configured to control the ray source to emit the beam of rays, control the rotational scanning device to perform the rotational CT scanning, and obtain a transmission CT image and a fluorescence CT image simultaneously based on the transmission data signal and the fluorescence data signal.

    Security check system and method
    110.
    发明授权
    Security check system and method 有权

    公开(公告)号：US10810437B2

    公开(公告)日：2020-10-20

    申请号：US15822920

    申请日：2017-11-27

    Applicant: Nuctech Company Limited

    Inventor： Zhiqiang Chen ,  Li Zhang ,  Gang Peng ,  Zhisheng Dai ,  Yunda Sun ,  Dong Li

    IPC: G06K9/00 ,  G06K9/46 ,  G06K9/78 ,  G06T7/00 ,  G08B7/06

    Abstract: The present disclosure relates to a security check system and method. The present disclosure provides a security check system for identifying objects of interest from multiple objects, comprising: an object-of-interest determining device for determining whether an object is an object of interest; an image mark applying device for acquiring images related to selected objects among the multiple objects and recording image marks of the selected objects; and a mark detecting device for detecting the image marks, wherein the security check system is configured to identify whether the object is the object of interest based on the detection of the mark detecting device and outputs a warning accordingly.

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