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公开(公告)号：US10969485B2
公开(公告)日：2021-04-06
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 , G01S7/03 , H01Q1/00 , H01Q3/24 , G01S13/42 , H01Q3/04 , G05B19/414 , G01S13/02 , G01S13/89
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：US10884116B2
公开(公告)日：2021-01-05
申请号：US16033246
申请日：2018-07-12
Inventor： Chunchao Qi , Hanjiang Chen , Zhiquan Li
Abstract: A human-body foreign-matter detection method and system based on millimeter-wave image. The method comprises: obtaining a millimeter-wave grayscale image of a human body; extracting a human-body contour image in the millimeter-wave grayscale image; constructing a vertical space distribution histogram in a vertical direction and a horizontal space distribution histogram in a horizontal direction for the human-body contour image; obtaining positions of limbs of the human body according to the vertical space distribution histogram, the horizontal space distribution histogram and a pre-set human-body proportion model; identifying a foreign matter in the human-body contour image according to pre-set foreign-matter feature identification models; and marking a position of the foreign matter on the human-body contour image according to the positions of the limbs, and generating a foreign-matter detection result.
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公开(公告)号：US20200042779A1
公开(公告)日：2020-02-06
申请号：US16321807
申请日：2017-07-17
Applicant: CHINA COMMUNICATION TECHNOLOGY CO., LTD. , SHENZHEN VICTOOTH TERAHERTZ TECHNOLOGY CO., LTD.
Inventor： Hanjiang Chen , Yanli Liu , Chunchao Qi , Guangsheng WU , Shukai Zhao , Qing Ding
Abstract: A human body gender automatic recognition method includes: acquiring a current millimeter wave grayscale image, and determining gender part region positions of a human body in the millimeter wave grayscale image according to a pre-set body proportion; extracting a region sub-image corresponding to the gender part region position; performing dimension normalization on the region sub-image to obtain the region sub-image after normalization; performing feature information extraction on the region sub-image after normalization to obtain feature information about the region sub-image after normalization; recognizing the millimeter wave grayscale image by means of each pre-set classifier, and respectively outputting results; and integrating the output results to obtain a classification recognition result of the millimeter wave grayscale image. The method has relatively high recognition rate and calculation efficiency, and solves the problem of a privacy protection and detection method in a millimeter wave security inspection system.
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公开(公告)号：US20180329053A1
公开(公告)日：2018-11-15
申请号：US16033246
申请日：2018-07-12
Inventor： Chunchao Qi , Hanjiang Chen , Zhiquan Li
CPC classification number: G01S13/887 , G01S7/41
Abstract: A human-body foreign-matter detection method and system based on millimeter-wave image. The method comprises: obtaining a millimeter-wave grayscale image of a human body; extracting a human-body contour image in the millimeter-wave grayscale image; constructing a vertical space distribution histogram in a vertical direction and a horizontal space distribution histogram in a horizontal direction for the human-body contour image; obtaining positions of limbs of the human body according to the vertical space distribution histogram, the horizontal space distribution histogram and a pre-set human-body proportion model; identifying a foreign matter in the human-body contour image according to pre-set foreign-matter feature identification models; and marking a position of the foreign matter on the human-body contour image according to the positions of the limbs, and generating a foreign-matter detection result.
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公开(公告)号：US11529067B2
公开(公告)日：2022-12-20
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: A61B5/0507 , G01N23/04 , G06T7/70 , G01S13/88
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.
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Patent Agency Ranking
公开(公告)号：US11283167B2
公开(公告)日：2022-03-22
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
Abstract: The invention relates to a power adjustment method and apparatus, and a human body security check device. An adjustable power attenuator is provided in a millimeter wave signal transmitting link of the millimeter wave transceiver. The method 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. The solution can reduce radiation hazard while ensuring the definition of an image.
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公开(公告)号：US11215730B2
公开(公告)日：2022-01-04
申请号：US16345971
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 , Lingxia Guo , Chao Sun , Xiaoxiang Hou , Shukai Zhao
Abstract: A close range microwave imaging method and system is provided. The method comprises: controlling a linear antenna array consisting of a preset number of antennas to rotate along a preset arc trajectory so as to scan a target region; controlling the linear antenna array to acquire a preset number of echo data at azimuthal positions on the arc trajectory and to send an echo data set constituted by the preset number of echo data to a signal processing device until the linear antenna array completes the acquisition of echo data at preset azimuthal positions on the arc trajectory; and controlling, every time the signal processing device receives the echo data set, the signal processing device to perform imaging processing on the echo data set.
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公开(公告)号：US11209538B2
公开(公告)日：2021-12-28
申请号：US16327409
申请日：2017-08-04
Applicant: CHINA COMMUNICATION TECHNOLOGY CO., LTD. , SHENZHEN INSTITUTE OF TERAHERTZ TECHNOLOGY AND INNOVATION
Inventor： Shukai Zhao , Lingxia Guo , Chunchao Qi , Xiongwei Huang , Hanjiang Chen
Abstract: A millimeter-wave three-dimensional holographic imaging method and system. The method comprises: transmitting a continuous frequency wave to a measured human body, and receiving an echo signal reflected back; performing Fourier transform, phase compensation, inverse Fourier transform, and “non-uniform sampling to uniform sampling” interpolation; and projecting three-dimensional echo data to obtain two-dimensional reconstruction data, and generating a two-dimensional reconstructed image.
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29.发明授权公开(公告)号：US11125855B2
公开(公告)日：2021-09-21
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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公开(公告)号：US20200333504A1
公开(公告)日：2020-10-22
申请号：US16336772
申请日：2017-08-04
Applicant: CHINA COMMUNICATION TECHNOLOGY CO.,LTD.
Inventor： Hanjiang Chen , Zhiquan Li , Chunchao Qi , Shukai Zhao
Abstract: A millimeter wave image based human body foreign object detection method, comprising: acquiring a millimeter wave gray scale image of a human body; according to a pre-determined foreign object imaging characteristic, extracting from the millimeter wave gray scale image a foreign object area image; according to a pre-determined foreign object image recognition algorithm, performing calculations on the foreign object area image, and acquiring a foreign object image from the foreign object area image; displaying the foreign object image as a foreign object detection result. Also provided is a millimeter wave image based human body foreign object detection system.
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