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    MILLIMETER WAVE IMAGING-BASED OMNI-DIRECTIONAL SECURITY DETECTION SYSTEM
    1.
    发明申请
    MILLIMETER WAVE IMAGING-BASED OMNI-DIRECTIONAL SECURITY DETECTION SYSTEM 审中-公开

    公开(公告)号：US20190187327A1

    公开(公告)日：2019-06-20

    申请号：US16326305

    申请日：2016-12-15

    Applicant: CHINA COMMUNICATION TECHNOLOGY CO., LTD. ,  SHENZHEN VICTOOTH TERAHERTZ TECHNOLOGY CO., LTD.

    Inventor： Shukai ZHAO ,  Chunchao QI ,  Zhihui FENG ,  Hanjiang CHEN

    IPC: G01V8/00 ,  G01S13/89

    CPC classification number: G01V8/005 ,  G01S13/89 ,  G01V3/12

    Abstract: A disclosed system includes a support frame including a plurality of surfaces, a millimeter-wave transmission link that generates a millimeter-wave transmission signal, a plurality of millimeter-wave array antennas, a millimeter-wave reception link, and an image processing device. The millimeter-wave array antennas are disposed on different surfaces of the support frame, and transmit millimeter-wave transmission signals from different angles to a to-be-detected object and receive echo signals reflected from the to-be-detected object. By providing the millimeter-wave array antennas on each of the plurality of surfaces of the support frame, and transmitting millimeter-wave transmission signals from different angles to a to-be-detected object and receiving echo signals reflected from different angles of the to-be-detected object, a three-dimensional image of the to-be-detected object can be established, thereby achieving omni-directional detection of the to-be-detected object. The system can detect human and objects at the same time, and is convenient, quick and highly accurate.

    THREE-DIMENSIONAL IMAGING SYSTEM AND METHOD BASED ON ROTATIONAL SCANNING
    2.
    发明申请
    THREE-DIMENSIONAL IMAGING SYSTEM AND METHOD BASED ON ROTATIONAL SCANNING 审中-公开

    公开(公告)号：US20190317208A1

    公开(公告)日：2019-10-17

    申请号：US16467662

    申请日：2017-11-16

    Applicant: CHINA COMMUNICATION TECHNOLOGY CO., LTD. ,  SHENZHEN INSTITUTE OF TERAHERTZ TECHNOLOGY AND INNOVATION

    Inventor： Chunchao QI ,  Aixian WANG ,  Hanjiang CHEN ,  Jiaqi RUAN ,  Juncheng LIU ,  Qian XIAO ,  Wei CHEN ,  Shukai ZHAO

    IPC: G01S13/88 ,  G01S13/89

    Abstract: A three-dimensional imaging system and method based on rotational scanning is disclosed. The system includes a column-shaped frame with a column-shaped side; a transceiving antenna array element arranged on the column-shaped side that transmits a micro-wave detection signal to a detected object located in the column-shaped frame and receives an echo signal reflected back from the detected object; a signal transceiving device that generates the micro-wave detection signal and sends same to the transceiving antenna array element and processes the echo signal; a rotation control device that controls rotational movement of the transceiving antenna array element so that the transceiving antenna array element transmits the micro-wave detection signal to the detected object in a plurality of angles; and a positioning trigger fixedly arranged on the column-shaped frame and configured to trigger the signal transceiving device when the transceiving antenna array element arrives at a position of the positioning trigger.

    CLOSE-RANGE MICROWAVE IMAGING METHOD AND SYSTEM
    3.
    发明申请
    CLOSE-RANGE MICROWAVE IMAGING METHOD AND SYSTEM 审中-公开

    公开(公告)号：US20200150265A1

    公开(公告)日：2020-05-14

    申请号：US16607577

    申请日：2017-09-04

    Applicant: China Communication Technology Co., Ltd.

    Inventor： Chunchao QI ,  Guangsheng WU ,  Shukai ZHAO ,  Qian XIAO ,  Aixian WANG

    IPC: G01S13/88 ,  G01S13/04

    Abstract: A close-range microwave imaging method includes: implementing Fourier transform in a pre-set rotation axis direction on an echo signal reflected from a target object and acquired by rotating an array antenna around the pre-set rotation axis to obtain a first echo signal, wherein the first echo signal is represented in polar coordinates; multiplying the first echo signal by a pre-set reference function to obtain a second echo signal; converting the second echo signal into rectangular coordinates by a pre-set algorithm to obtain a third echo signal; and implementing three-dimensional Fourier transform on the third echo signal to obtain three-dimensional image data of the target object. By means of the method, three-dimensional image data of a target object can be obtained fast, fast imaging of the target object can be realized, the data processing amount is small, the imaging precision is high and the method is easy to implement.

    GPU-BASED HUMAN BODY MICROWAVE ECHO SIMULATION METHOD AND SYSTEM
    4.
    发明申请
    GPU-BASED HUMAN BODY MICROWAVE ECHO SIMULATION METHOD AND SYSTEM 审中-公开

    公开(公告)号：US20200041691A1

    公开(公告)日：2020-02-06

    申请号：US16340332

    申请日：2017-08-04

    Applicant: CHINA COMMUNICATION TECHNOLOGY CO., LTD. ,  SHENZHEN INSTITUTE OF TERAHERTZ TECHNOLOGY AND INNOVATION

    Inventor： Chunchao QI ,  Aixian WANG ,  Hanjiang CHEN ,  Xiongwei HUANG ,  Yanli LIU ,  Chengyan JIA ,  Shukai ZHAO

    IPC: G01V13/00 ,  G01V8/00 ,  G01V8/10

    Abstract: A GPU-based human body microwave echo simulation method includes: transmitting emulation input parameters from the memory of a CPU host into the display memory of a GPU device; configuring, at the CPU host, parallel computing network parameters to be run at the GPU device; initiating a kernel function for human body microwave echo simulation preset in the CPU host; computing the kernel function in parallel, in a plurality of processing kernels of the GPU device, in a multi-threaded manner, according to the parallel computing network parameters, to obtain simulation echoes of human body microwaves; transmitting the obtained simulation echoes of human body microwaves from the GPU device back to the CPU host. The method makes full use of the characteristic that a GPU can perform parallel computing to accelerate the echo simulation process, greatly improving the real-time performance of echo simulation of a human body microwave scanning and imaging system.

    POWER ADJUSTMENT METHOD AND APPARATUS, AND HUMAN BODY SECURITY CHECK DEVICE
    5.
    发明申请
    POWER ADJUSTMENT METHOD AND APPARATUS, AND HUMAN BODY SECURITY CHECK DEVICE 审中-公开

    公开(公告)号：US20190260121A1

    公开(公告)日：2019-08-22

    申请号：US16331113

    申请日：2017-09-06

    Applicant: CHINA COMMUNICATION TECHNOLOGY CO., LTD. ,  SHENZHEN INSTITUTE OF TERAHERTZ TECHNOLOGY AND INNOVATION

    Inventor： Chunchao QI ,  Shukai ZHAO ,  Hanjiang CHEN ,  Beibei LIU

    IPC: H01Q3/22 ,  G01S13/89 ,  G01V8/20 ,  G06F17/14

    Abstract: A power adjustment method and apparatus, and a human body security check device are disclosed. The method may be applied in a human body security check device or an inspection device provided with a millimeter wave transceiver and comprises: obtaining a current humidity value by detecting the ambient humidity around the millimeter wave transceiver using a preset humidity sensor; determining a target power attenuation value of the adjustable power attenuator according to the current humidity value, the sum of the target power attenuation value and a power attenuation value caused to a millimeter wave signal by the ambient humidity being a constant value; and controlling the adjustable power attenuator to adjust its power attenuation value to be consistent with the target power attenuation value. An adjustable power attenuator is provided in a millimeter wave signal transmitting link of the millimeter wave transceiver.

    SECURITY CHECK METHOD AND SYSTEM BASED ON MICROWAVE IMAGING OF HUMAN BODIES
    8.
    发明申请
    SECURITY CHECK METHOD AND SYSTEM BASED ON MICROWAVE IMAGING OF HUMAN BODIES 审中-公开

    公开(公告)号：US20200054236A1

    公开(公告)日：2020-02-20

    申请号：US16345985

    申请日：2017-08-04

    Applicant: CHINA COMMUNICATION TECHNOLOGY CO., LTD. ,  SHENZHEN INSTITUTE OF TERAHERTZ TECHNOLOGY AND INNOVATION

    Inventor： Chunchao QI ,  Aixian WANG ,  Hanjiang CHEN ,  Tiansheng ZHANG ,  Zhihui FENG ,  Hu YUAN ,  Shukai ZHAO

    IPC: A61B5/05 ,  G01N23/04

    Abstract: A security check method includes: pre-creating at least four concurrently operating threads, one thread being responsible for movement control and data acquisition, one thread being responsible for imaging processing, one thread being responsible for interface displaying, and one thread being responsible for target detection and recognition; then the four concurrently operating threads divide original echo data of a human body to be checked into data of a plurality of adjacent overlapped azimuthal segments during data processing and perform individual processing on the data of each azimuthal segment. The security check system includes a thread creating unit, a first thread parallel unit, a second thread parallel unit, a third thread parallel unit, a fourth thread parallel unit, and a thread loop control unit. Because subsequent data processing is not required to be performed after the acquisition of all data is completed, the time for a security check process is reduced.

    HUMAN BODY SECURITY CHECK SYSTEM AND METHOD BASED ON MILLIMETER WAVE HOLOGRAPHIC THREE-DIMENSIONAL IMAGING
    9.
    发明申请
    HUMAN BODY SECURITY CHECK SYSTEM AND METHOD BASED ON MILLIMETER WAVE HOLOGRAPHIC THREE-DIMENSIONAL IMAGING 审中-公开

    公开(公告)号：US20190391531A1

    公开(公告)日：2019-12-26

    申请号：US16065953

    申请日：2016-01-27

    Applicant: SHENZHEN INSTITUTE OF TERAHERTZ TECHNOLOGY AND INNOVATION ,  CHINA COMMUNICATION TECHNOLOGY CO., LTD.

    Inventor： Chunchao QI ,  Shukai ZHAO ,  Juncheng LIU ,  Guangsheng WU ,  Qing DING ,  Chengyan JIA ,  Beibei LIU ,  Yandong ZHANG ,  Yanli LIU

    IPC: G03H1/00 ,  G03H1/04

    Abstract: A human body security check system based on millimeter wave holographic three-dimensional imaging, comprising a mechanical scanning mechanism, millimeter wave signal transceiver units, an image processing unit (7), and an alarm unit (9). The mechanical scanning mechanism is used for driving the millimeter wave signal transceiver units to simultaneously move horizontally and vertically relative to an individual to be checked (10); the millimeter wave signal transceiver units are used for transmitting millimeter wave signals to the individual to be checked (10) and receiving millimeter wave signals reflected by the individual to be checked (10); the image processing unit (7) is used for performing holographic three-dimensional imaging on the body of the individual to be checked (10) according to the reflected millimeter wave signals so as to obtain a three-dimensional image of the body; the alarm unit (9) is used for comparing the three-dimensional image of the body with a three-dimensional image of a secure body pre-stored in the alarm unit (9), and giving an alarm if the three-dimensional image of the body does not match the three-dimensional image of the secure body pre-stored in the alarm unit. The human body security check system is low in costs because electrical scanning is replaced with mechanical scanning, and features a simple structure, a short production period, high resolution, a short imaging time, and wide application. Also provided is a human body security check method based on millimeter wave holographic three-dimensional imaging.

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