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公开(公告)号：US11561300B2
公开(公告)日：2023-01-24
申请号：US16607577
申请日：2017-09-04
Applicant: China Communication Technology Co., Ltd. , Shenzhen Victooth Terahertz Technology Co., Ltd.
Inventor： Chunchao Qi , Guangsheng Wu , Shukai Zhao , Qian Xiao , Aixian Wang
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.
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公开(公告)号：US11385380B2
公开(公告)日：2022-07-12
申请号：US16315582
申请日：2017-07-06
Applicant: CHINA COMMUNICATION TECHNOLOGY CO., LTD , SHENZHEN INSTITUTE OF TERAHERTZ TECHNOLOGY AND INNOVATION CO., LTD
Inventor： Chunchao Qi , Chao Sun , Shukai Zhao , Guangsheng Wu , Qing Ding
Abstract: A millimeter wave security inspection instrument debugging system and a millimeter wave security inspection instrument debugging method, which are used for debugging the imaging definition of a millimeter wave holographic imaging security inspection system. A main control apparatus is used for generating a millimeter wave detection signal and a reference signal. The main control apparatus is also used for, where a millimeter wave transmitting antenna, a millimeter wave receiving antenna and a detected object are respectively located at different relative positions, transmitting the millimeter wave detection signal to the detected object by means of the millimeter wave transmitting antenna, and receiving an echo signal reflected from the detected object by means of the millimeter wave receiving antenna, and then using a holographic image technique to perform three-dimensional imaging according to the reference signal and the echo signal. The main control apparatus can finally obtain a plurality of three-dimensional imaging results, so that the optimal relative positions of the millimeter wave transmitting antenna, the millimeter wave receiving antenna and the detected object can be determined, which results are applied to a millimeter wave holographic imaging security inspection system, thereby improving the imaging definition of the millimeter wave holographic imaging security inspection system.
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13.发明授权公开(公告)号：US11163058B2
公开(公告)日：2021-11-02
申请号：US16065998
申请日：2016-01-27
Inventor： Chunchao Qi , Shukai Zhao , Beibei Liu , Guangsheng Wu , Qing Ding , Xiongwei Huang , Juncheng Liu , Chengyan Jia , Yandong Zhang , Yanli Liu
Abstract: This invention provides a security check apparatus for multiple human bodies based on linear frequency modulation, which comprises a scanning device, a millimeter wave signal transceiver module, and an image processing unit. The scanning device comprises several detection seats and several guideways and motors arranged on the detection seats; the detection seats are configured to accommodate persons to be security checked; a set of the millimeter wave signal transceiver modules are arranged on each guideway, and each millimeter wave signal transceiver module is driven by the motor to move along the guideway; the several detection seats are arranged in longitudinal direction. The millimeter wave signal transceiver modules are configured to transmit millimeter wave signals to the persons to be security checked and receive millimeter wave signals reflected from the persons to be security checked. The image processing unit is configured to perform holographic 3D imaging on the human bodies of the persons to be security checked based on the reflected millimeter wave signals to obtain 3D images of the human bodies. This invention also provides a security check method for multiple human bodies based on linear frequency modulation. This invention has the advantages of low cost, simple structure, easy integration, high resolution, more persons are detected per unit time, and no radiation hazard to human bodies.
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公开(公告)号：US10706552B2
公开(公告)日：2020-07-07
申请号：US16019562
申请日：2018-06-27
Inventor： Chunchao Qi , Yanli Liu , Hanjiang Chen , Guangsheng Wu , Shukai Zhao , Qing Ding
Abstract: The present disclosure relates to a method and device for detecting concealed dangerous objects in microwave images. The method includes: simultaneously processes multiple adjacent microwave images, obtains edge images of a single image by using two methods for each image, obtains dangerous-object edges of the single image by edge fitting operation, obtains a rough dangerous-object contour by performing a registration operation and a second edge fitting operation on the dangerous-object edges of the multiple images, and performs a regional-binarization operation and a filtering on the rough dangerous-object contour to obtain a second dangerous-object area. The present disclosure has high detection accuracy and calculation efficiency.
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15.发明授权公开(公告)号：US10551490B2
公开(公告)日：2020-02-04
申请号：US16034377
申请日：2018-07-13
Inventor： Chunchao Qi , Chao Sun , Guangsheng Wu , Shukai Zhao , Qing Ding
Abstract: The present disclosure relates to a security inspection system and method using the three-dimensional holographic imaging technology. The system comprises: a body frame; a millimeter-wave transceiving module, disposed on the body frame; and at least two millimeter-wave switch antenna arrays, connected with the millimeter-wave transceiving module; the number of the millimeter-wave switch antenna arrays being the same as that of the scan areas; a scan driving device, configured to drive the at least two millimeter-wave switch antenna arrays to rotate along the same direction; a control device, configured to control the scan driving device to generate a rotation angle signal; and a parallel-image processing module, configured to synthesize a three-dimensional holographic image of an under-test object according to echo signals collected by the millimeter-wave transceiving module and spatial position information of the echo signals. The present disclosure simplifies the system structure and improves the imaging resolution.
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Patent Agency Ranking
公开(公告)号：US20180341015A1
公开(公告)日：2018-11-29
申请号：US16052650
申请日：2018-08-02
Inventor： Chunchao QI , Xiongwei Huang , Hanjiang Chen , Guangsheng Wu , Shukai Zhao , Qing Ding
IPC: G01S13/88 , G01S13/89 , G05B19/414
Abstract: A servo rotary scanning system of three-dimensional holographic imaging may include a servomotor (20) having a first angle sensor (21), a second angle sensor (30), a control component (40), a servo driver (50) and a rotary frame (10), the servo rotary scanning system of three-dimensional holographic imaging is a full-closed loop servo control system, the second angle sensor (30) detects an actual rotating angle of the rotary frame (10) and feeds back a frame feedback signal to the control component (40), an instruction signal in the control component (40) is compared with the frame feedback signal to generate a following error, the first angle sensor (21) detects an output rotating angle of the servomotor (20) and feeds back a motor feedback signal to the servo driver (50), and the servo driver (50) controls the servomotor (20) to rotate according to the following error and the motor feedback signal.
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公开(公告)号：US11531097B2
公开(公告)日：2022-12-20
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
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.
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公开(公告)号：US10928547B2
公开(公告)日：2021-02-23
申请号：US16330298
申请日：2016-12-21
Applicant: CHINA COMMUNICATION TECHNOLOGY CO., LTD. , SHENZHEN INSTITUTE OF TERAHERTZ TECHNOLOGY AND INNOVATION
Inventor： Hanjiang Chen , Tiansheng Zhang , Chunchao Qi , Shukai Zhao
Abstract: A terahertz security check method and system may include: a terahertz scanning device collecting a terahertz original image of a human body under test, and sending the same to a central server that identifies the terahertz original image, and determines whether the human body under test carries an article. If so, the image is marked with the position of the article and sent to a monitoring terminal. The monitoring terminal correspondingly marking the position of the article on a pre-stored human body cartoon image, and displaying the terahertz original images before and after marking to monitoring personnel, so that the monitoring personnel determine whether the central server has an identification error; and if so, the monitoring terminal changing a marker on the human body cartoon image, and sending the changed cartoon image to a client of security check personnel for displaying.
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公开(公告)号：US10795015B2
公开(公告)日：2020-10-06
申请号：US16034380
申请日：2018-07-13
Inventor： Chunchao Qi , Rong Wang , Guangsheng Wu , Shukai Zhao , Qing Ding
Abstract: The present disclosure relates to a scanning apparatus and a security-inspection device with the same. The scanning apparatus include: at least one millimeter-wave transreceiving antenna module, wherein the millimeter-wave transreceiving antenna module include a plurality of millimeter-wave transreceiving antenna units each having a signal terminal facing the predetermined scanning area, and a dustproof film covering the signal terminal of each of the millimeter-wave transreceiving antenna units. The scanning mechanism is simple in structure, more convenient for maintenance, and has a lower cost. When each millimeter-wave transceiving antenna unit emits and receives millimeter waves, the millimeter waves pass through the dustproof film without passing through the organic glass, and the attenuation of the millimeter wave signal is small, thereby improving the 3D imaging effect of the security-inspection device.
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20.发明申请公开(公告)号：US20190302230A1
公开(公告)日：2019-10-03
申请号：US16317459
申请日：2017-07-05
Inventor： Chao Sun , Juncheng Liu , Chunchao Qi , Guangsheng WU , Shukai Zhao , Qing Ding
Abstract: A disclosed method includes: dividing an signal into a first signal and a second signal; performing frequency multiplication and amplification on the first signal to obtain an intermediate signal of corresponding power and frequency, and using the second signal as a local oscillation signal. The method further includes dividing the intermediate signal into a first intermediate signal and a second intermediate signal, and using the first intermediate signal as a reference signal; performing frequency mixing on the second intermediate signal and the local oscillation signal to obtain a mixed signal, which is a high-frequency millimeter wave signal; transmitting the mixed signal by a transmitting antenna; and performing frequency mixing on the signal received by a receiving antenna and the reference signal to obtain an intermediate-frequency controllable signal having a frequency consistent with that of the output signal of the signal source.
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