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1.发明申请公开(公告)号：US20190181810A1
公开(公告)日：2019-06-13
申请号：US16327483
申请日：2016-08-22
Applicant: CHINA COMMUNICATION MICROELECTRONICS TECHNOLOGY CO., LTD. , CHINA COMMUNICATION TECHNOLOGY CO., LTD.
Inventor： Shoukui ZHU , Qing DING , Guangsheng WU , Jianguo MA
Abstract: Embodiments of the present disclosure include a harmonic power amplifying circuit with high efficiency and high bandwidth and a radio-frequency power amplifier. The circuit comprises an input matching network (11), a transistor (M), and an output matching network (12); a gate of the transistor (M) connected to an output end of the input matching network (11), a drain thereof connected to an input end of the output matching network (12), and a source thereof being grounded; wherein the output matching network (12) enables a lower sideband of the harmonic power amplifying circuit to work in a continuous inverse F amplification mode and an upper sideband of the harmonic power amplifying circuit to work in a continuous F amplification mode; wherein the output matching network (12) and a parasitic network of the transistor (M) form a low pass filter. By transitioning from the continuous inverse F power amplifier working mode to the continuous F power amplifier working mode, the efficiency of a continuous harmonic control power amplifier is effectively improved to be higher than 60%, a relative bandwidth is improved to be higher than 80%, and the harmonic impedance is simple to match and easy to realize.
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公开(公告)号：US20180342064A1
公开(公告)日：2018-11-29
申请号：US16019562
申请日：2018-06-27
Inventor： Chunchao QI , Yanli LIU , Hanjiang CHEN , Guangsheng WU , Shukai ZHAO , Qing DING
CPC classification number: G06T7/13 , G01N22/00 , G01V5/0016 , G06K9/00771 , G06K2209/09 , G06T7/0002 , G06T7/001 , G06T7/11 , G06T7/12 , G06T7/174 , G06T2207/30196
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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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
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：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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5.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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Patent Agency Ranking
公开(公告)号：US20190227190A1
公开(公告)日：2019-07-25
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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7.发明申请公开(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
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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公开(公告)号：US20190258220A1
公开(公告)日：2019-08-22
申请号：US16319160
申请日：2017-07-13
Applicant: CHINA COMMUNICATION TECHNOLOGY CO., LTD. , SHENZHEN VICTOOTH TERAHERTZ TECHNOLOGY CO., LTD.
Inventor： Rong Wang , Chunchao Qi , Xiongwei Huang , Guangsheng WU , Shukai Zhao , Qing Ding
IPC: G05B19/4061
Abstract: A security check instrument motion control system includes an FPGA control chip that receives motion instructions, comprising angle, direction, speed and the like, from an upper computer via an upper computer communication module, realizes quick control to a rotation motion module, and controls a motion state of the rotation motion module according to real-time motion information of the rotation motion module detected by a positioning detection module. The motion state includes a motion stop state and a normal rotation state. The FPGA control chip detects the working state of each module in the security check instrument motion control system in real time, and once the security check instrument motion control system has a fault, each module can be subjected to debugging, repairing and maintenance respectively. If the positioning detection module detects that the rotation motion module is abnormal, the FPGA control chip controls the rotation motion module to stop moving.
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公开(公告)号：US20190138802A1
公开(公告)日：2019-05-09
申请号：US16305839
申请日：2017-05-17
Applicant: SHENZHEN VICTOOTH TERAHERTZ TECHNOLOGY CO., LTD , CHINA COMMUNICATION TECHNOLOGY CO., LTD.
Inventor： Chunchao QI , Zhiquan LI , Hanjiang CHEN , Guangsheng WU , Shukai ZHAO , Qing DING
Abstract: This invention relates to a method and a device for human body gender detection in a microwave image. The structure feature of a human body itself as well as the constructed vertical direction spatial distribution histogram and horizontal direction spatial distribution histogram are used to accurately locate the chest position and the crotch position of the human body. A human body chest subimage is extracted according to the chest position, and a human body crotch subimage is extracted according to the crotch position. Then, the feature values of the human body chest subimage and the human body crotch subimage are respectively extracted by a feature value extraction algorithm, and the human body gender is automatically identified according to the feature values. The technical solution of this invention is simple, and after experimental verification, can be effectively applied in actual microwave security check system. This technical solution has high real time and high robustness, and its correct recognition rate meets the operating requirements. As such, the problem of how to identify human body gender in real time and accurately in a microwave security check system is solved. Besides, because the present invention can accurately locate the chest position and the crotch position of a human body, the human body's private part can be shielded and protected effectively according to this invention.
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10.发明申请公开(公告)号：US20190025421A1
公开(公告)日：2019-01-24
申请号：US16065998
申请日：2016-01-27
Inventor： Chunchao QI , Shukai ZHAO , Beibei LIU , Guangsheng WU , Qing DING , Xiongwei HUANG , Jungcheng 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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