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公开(公告)号：US20190243022A1
公开(公告)日：2019-08-08
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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12.发明申请公开(公告)号：US20180321373A1
公开(公告)日：2018-11-08
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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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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15.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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Patent Agency Ranking
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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17.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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公开(公告)号：US11250249B2
公开(公告)日：2022-02-15
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 a normalized region sub-image; performing feature information extraction on the normalized region sub-image to obtain feature information about the normalized region sub-image; 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：US11211701B2
公开(公告)日：2021-12-28
申请号：US16334582
申请日：2016-12-15
Applicant: CHINA COMMUNICATION TECHNOLOGY CO., LTD. , Shenzhen Institute of Terahertz Technology and Innovation
Inventor： Zhihui Feng , Chunchao Qi , Hanjiang Chen , Rong Wang , Shukai Zhao
IPC: H01Q3/22 , H01Q21/06 , H04B10/2507 , H04N5/225
Abstract: An electrically scanned array antenna device applied to a millimeter wave imaging system is provided. The electrically scanned array antenna device comprises an adjustable light source for outputting an optical signal with an adjustable wavelength; an electro-optical modulation module; an optocouple; a time delay module for performing optical delay of different duration on each modulated signal, and correspondingly changing the duration of the optical delay according to the wavelength of the optical signal to obtain modulated signals of different phases; an optical detector; and an array antenna. The millimeter wave is loaded on the optical signal with an adjustable wavelength to obtain a modulated signal; the modulated signal is divided into multiple signals; time delay of different duration is performed on each signal; and millimeter wave signals of different phases are obtained after demodulation and are simultaneously transmitted to scan an object to be measured.
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公开(公告)号：US11194073B2
公开(公告)日：2021-12-07
申请号：US16336772
申请日：2017-08-04
Applicant: CHINA COMMUNICATION TECHNOLOGY CO., LTD. , Shenzhen Institute of Terahertz Technology and Innovation
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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