Patents by Inventor Yuanjing Li

Yuanjing Li has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240014567
    Abstract: The present disclosure provides a wide beam radiation leakage coaxial cable, which includes an inner conductor, an insulating layer, an outer conductor and a sheath coaxially nested from inside to outside in sequence, at least two columns of slot groups are provided on the outer conductor, the columns of slot groups are distributed at different angles in the circumferential direction of the outer conductor, the included angle between two adjacent columns of slot groups is ?=?/n, where ? is the target radiation width, n is the number of columns of slot groups, each column of slot groups includes a plurality of slot arrays periodically arranged in the axial direction of the outer conductor, the pitch of each column of slot groups is the same, the pitch phase of each column of slot groups on the same leakage cable section is consistent, and each slot array includes a plurality of slots.
    Type: Application
    Filed: March 8, 2021
    Publication date: January 11, 2024
    Inventors: Haiyan SONG, Zhonghua LIU, Jianghua SHEN, Huibing WANG, Chao WU, Xuezi XU, Yi ZHOU, Cenjia LV, Lingfeng WANG, Yuanjing LI
  • Patent number: 11822043
    Abstract: The present disclosure provides a radiation inspection apparatus and a radiation inspection method. The radiation inspection apparatus includes: a radiation inspection device comprising a ray source and a detector that cooperates with the ray source to perform scanning inspection on an object to be inspected, the radiation inspection device having an inspection channel for the object to be inspected to pass through when scanning inspection is performed thereon; and traveling wheels provided at the bottom of the radiation inspection device to enable the radiation inspection apparatus to travel in an extension direction of the inspection channel, and the traveling wheels are configured to rotate 90° to enable the radiation inspection apparatus to travel in a direction perpendicular to the extension direction of the inspection channel.
    Type: Grant
    Filed: January 3, 2020
    Date of Patent: November 21, 2023
    Inventors: Zhiqiang Chen, Yuanjing Li, Li Zhang, Jianmin Li, Shangmin Sun, Chunguang Zong, Yu Hu, Quanwei Song, Hejun Zhou, Weifeng Yu, Jinguo Cao, Bing Fu
  • Patent number: 11798188
    Abstract: The present disclosure provides a method of remotely measuring a size of a pupil, including: acquiring an image of a to-be-measured person by using a detection device; acquiring an image of a pupil of the to-be-measured person from the image of the to-be-measured person; measuring a distance between the to-be-measured person and the detection device by using the detection device; and calculating an actual size of the pupil of the to-be-measured person based on the measured distance and the image of the pupil of the to-be-measured person. The present disclosure further provides an apparatus for remotely measuring a size of a pupil, an electronic device, and a non-transitory computer-readable medium.
    Type: Grant
    Filed: February 24, 2021
    Date of Patent: October 24, 2023
    Assignees: Tsinghua University, Nuctech Company Limited
    Inventors: Zhiqiang Chen, Yuanjing Li, Jianmin Li, Xianghao Wu, Bin Liu, Guocheng An
  • Publication number: 20230288350
    Abstract: The present invention relates to a backscatter imaging device, a control method and an inspection system. The backscatter imaging device includes a ray source assembly configured to emit rays to a scanning area; a backscatter detector array including a plurality of backscattering detectors and configured to receive scattered photons when the rays are backscattered by an object within the scanning area; and a first collimator assembly including a plurality of first collimating channels corresponding to the plurality of backscatter detectors respectively, arranged on one side of the backscatter detector array adjacent to the scanning area, and configured to align the scattered photons when the rays are backscattered by the object, and the plurality of backscatter detectors receive scattered photons corresponding to a plurality of depths in the object respectively; and at least part of the plurality of first collimation channels have an adjustable collimation angle.
    Type: Application
    Filed: July 2, 2021
    Publication date: September 14, 2023
    Inventors: Zhiqiang CHEN, Yuanjing LI, Shangmin SUN, Chunguang ZONG, Yu HU, Huaping TANG, Bicheng LIU, Weizhen WANG
  • Publication number: 20230236093
    Abstract: Provided are an odor sniffing device (11) and a vehicle-mounted security inspection apparatus for a container (1). The odor sniffing device (11) includes a primary sampling front end (116), which has a vent adapter (116-1) having a shape matching with a vent of the ventilator of the container, so that when the primary sampling front end (116) fits with the ventilator, the vent adapter (116-1) and the vent generally cooperate to achieve fluid communication. The vehicle-mounted security inspection apparatus (1) may perform imaging inspection and chemical inspection simultaneously.
    Type: Application
    Filed: June 7, 2021
    Publication date: July 27, 2023
    Inventors: Qingjun ZHANG, Yuanjing LI, Zhiqiang CHEN, Jianmin LI, Weiping ZHU, Ge LI, Nei YANG, Biao CAO, Wei WANG, Xiulin NI, Shengxi LIU, Zheng LIANG
  • Publication number: 20230236150
    Abstract: A trace detection device including: an ion mobility tube ; a sampling gas path module ; a sample injection gas path module configured to introduce a sample carrier gas containing a sample collected by the sampling gas path module toward the ion mobility tube; and a gas chromatography apparatus capable of pre-separating the sample carrier gas, so as to form a pre-separated sample carrier gas; wherein the sample injection gas path module is further configured to be capable of switching between a first mode and a second mode, in the first mode, the sample injection gas path module introduces the sample carrier gas into the ion mobility tube; and in the second mode, the sample injection gas path module introduces the sample carrier gas into the gas chromatography apparatus to pre-separate the sample carrier gas, and the pre-separated sample carrier gas is introduced into the ion mobility tube.
    Type: Application
    Filed: May 14, 2021
    Publication date: July 27, 2023
    Inventors: Qingjun ZHANG, Yuanjing LI, Zhiqiang CHEN, Jianmin LI, Weiping ZHU, Qiufeng MA, Biao CAO, Lili YAN, Ge LI, Nei YANG
  • Publication number: 20230206414
    Abstract: A method of inspecting a vehicle includes: acquiring a to-be-inspected image of an inspected vehicle (S11); acquiring a visual feature of the to-be-inspected image using a first neural network model (S12); retrieving a template image from a vehicle template library based on the visual feature of the to-be-inspected image (S13); determining a variation region between the to-be-inspected image and the template image (S14); and presenting the variation region to a user (S15). The system of inspecting a vehicle includes a radiation imaging device (150), a display device (130), an image processor (140), and a storage device (120). The present disclosure further includes a computer-readable storage medium.
    Type: Application
    Filed: May 24, 2021
    Publication date: June 29, 2023
    Inventors: Zhiqiang CHEN, Li ZHANG, Yuanjing LI, Yuxiang XING, Jie SHI
  • Patent number: 11662457
    Abstract: A terahertz security inspection robot is provided, including: a housing including a main housing and a head housing rotatably connected to the main housing; a terahertz wave imaging mechanism including a mirror assembly arranged in the head housing and a detector array arranged in the main housing; and a rotating mechanism configured to cause the head housing and the mirror assembly located in the head housing to rotate with respect to the main housing, so that the mirror assembly of the terahertz wave imaging mechanism is oriented in different directions to respectively perform terahertz scanning and imaging on objects to be inspected in different inspection regions in a security inspection scene.
    Type: Grant
    Filed: June 22, 2021
    Date of Patent: May 30, 2023
    Assignees: Tsinghua University, NUCTECH COMPANY LIMITED
    Inventors: Zhiqiang Chen, Ziran Zhao, Yan You, Yuanjing Li, Shixin Zhang, Huan Xie, Xuming Ma, Rui Fan, Yinglei Wang
  • Patent number: 11613913
    Abstract: The present disclosure provides an intelligent lock.
    Type: Grant
    Filed: January 13, 2020
    Date of Patent: March 28, 2023
    Assignees: Nuctech Company Limited, Tsinghua University
    Inventors: Zhiqiang Chen, Yuanjing Li, Xianghao Wu, Shiguo Liu, Dawei Shi
  • Patent number: 11614413
    Abstract: The present disclosure provides a back scattering inspection system and a back scattering inspection method. The back scattering inspection system includes a frame and a back scattering inspection device. The rack includes a track arranged vertically or obliquely relative to the ground, and a space enclosed by the track forms an inspection channel; and the back scattering inspection device includes a back scattering ray emitting device and a back scattering detector, and the back scattering inspection device is movably disposed on the track for inspecting an inspected object passing through the inspection channel. The back scattering inspection system can perform back scattering inspection on a plurality of surfaces of the inspected object.
    Type: Grant
    Filed: January 3, 2020
    Date of Patent: March 28, 2023
    Inventors: Jianmin Li, Li Zhang, Yuanjing Li, Zhiqiang Chen, Hao Yu, Shangmin Sun, Bicheng Liu, Weizhen Wang, Dongyu Wang, Yuan Ma, Yu Hu, Chunguang Zong
  • Publication number: 20220404312
    Abstract: The present disclosure provides a gas analysis device and a method for detecting sample gas. The gas analysis device includes: an ion mobility spectrometer including an ion mobility tube, an ion gate, a plurality of electrodes, a suppression grid, and a Faraday plate sequentially disposed in the ion mobility tube, wherein the Faraday plate is configured to receive sample ions discharged from the suppression grid, and the Faraday plate is provided with a through hole; a mass spectrometer; a gate valve disposed between the Faraday plate and an ion inlet of the mass spectrometer; and a controller configured to control an opening or closing of the gate valve to allow the sample ions discharged from the suppression grid to flow into the mass spectrometer through the through hole of the Faraday plate when the gate valve is opened.
    Type: Application
    Filed: June 14, 2022
    Publication date: December 22, 2022
    Inventors: Yan Wang, Qingjun Zhang, Yuanjing Li, Zhiqiang CHEN, Jianmin Li, Yaohong Liu, Ge Li, Zhongyuan Hao, Nei Yang, Guangqin Li
  • Patent number: 11476102
    Abstract: Embodiments of the present disclosure provide a real-time calibration device, a real-time calibration method and a detection apparatus. The real-time calibration device is in fluid communication with a sample injection pipeline of the apparatus to be calibrated. The real-time calibration device is configured to release a trace amount of calibration agent molecules during a sample injection of the apparatus to be calibrated, so that the trace amount of calibration agent molecules and a sample entering the apparatus to be calibrated are mixed and together enter the apparatus to be calibrated, and information of the sample and the calibration agent is detected by the apparatus to be calibrated, thereby performing a calibration.
    Type: Grant
    Filed: August 27, 2020
    Date of Patent: October 18, 2022
    Assignees: Nuctech Company Limited, Tsinghua University
    Inventors: Qingjun Zhang, Zhiqiang Chen, Yuanjing Li, Jianmin Li, Yinong Liu, Yaohong Liu, Guangqin Li, Weiping Zhu, Ge Li, Qiufeng Ma, Biao Cao
  • Patent number: 11474051
    Abstract: The present disclosure provides a dual mode detection method, controller and system, which relates to the technical field of radiation detection. The dual mode detection method of the present disclosure includes: determining a ratio of neutron to X-ray differential cross sections of an inspected object, according to X-ray object detection data, X-ray object-free detection data, neutron object detection data, and neutron object-free detection data; determining a substance type of the inspected object according to a correspondence between the ratio of neutron to X-ray differential cross sections of the inspected object and the substance type.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: October 18, 2022
    Inventors: Yigang Yang, Xuewu Wang, Zhi Zhang, Yuanjing Li, Jianmin Li
  • Publication number: 20220304574
    Abstract: The present disclosure provides a method of determining a distance and a height, including: measuring, a first distance, a second distance and a third distance from the security inspection device to the tested person as well as measuring a first height, a second height and a third height of the tested person; determining, a relationship between the first distance and a minimum distance threshold as well as a maximum distance threshold, a relationship between the second distance and the minimum distance threshold as well as the maximum distance threshold, and a relationship between the third distance and the minimum distance threshold as well as the maximum distance threshold; determining, a final distance from the security inspection device to the tested person and a final height of the tested person; and performing a pixel conversion and a size conversion on the pupil image of the tested person
    Type: Application
    Filed: February 24, 2021
    Publication date: September 29, 2022
    Inventors: Zhiqiang CHEN, Yuanjing LI, Xianghao WU, Haitao ZHANG, Jundi DAI, Shaozhi ZHAO, Guocheng AN
  • Patent number: 11422070
    Abstract: A sampling probe, an automatic sampling device, and a container detection system are provided. The sampling probe includes: a mounting base; a housing mounted on the mounting base, a first accommodation chamber having an opening being defined in the housing, and an exhaust hole in communication with the first accommodation chamber and outside of the housing being formed in the housing; a coupling portion formed on an outer edge of the opening of the first accommodation chamber and formed to be hermetically coupled with an air outlet of a container; and a suction device mounted on the housing and configured to suck gas in the container into the first accommodation chamber through the air outlet. The sampling probe may collect the odor of toxic and harmful gases/hazardous chemicals inside the container at the air outlet of the container, without destroying the overall structure of the container.
    Type: Grant
    Filed: August 10, 2020
    Date of Patent: August 23, 2022
    Assignees: NUCTECH COMPANY LIMITED, Tsinghua University
    Inventors: Qingjun Zhang, Yuanjing Li, Zhiqiang Chen, Jianmin Li, Shangmin Sun, Yaohong Liu, Weiping Zhu, Qiufeng Ma, Ge Li, Biao Cao, Zheng Liang, Ying Li, Yu Hu
  • Patent number: 11408852
    Abstract: A sampling tube bundle includes a tube bundle body and a joint assembly. The tube bundle body includes a gas sampling tube for transmitting sampling gas; a metal woven layer wrapping an outer circumference of the gas sampling tube; a heating pad comprising a heat tracing cable wrapping an outer circumference of the metal woven layer, for heating the sampling gas in the gas sampling tube; a flame resistant tape wound around an outer circumference of the of the heating pad; a plurality of signal transmission lines circumferentially spaced apart from one another are arranged outside the flame resistant tape; and a sheath located outside the signal transmission line. The joint assembly is arranged on an end of the tube bundle body, for connecting to an analysis device or a sampling device.
    Type: Grant
    Filed: May 8, 2019
    Date of Patent: August 9, 2022
    Assignees: TSINGHUA UNIVERSITY, Nuctech Company Limited, WUHU JIAHONG NEW MATERIAL CO., LTD.
    Inventors: Zhiqiang Chen, Chunan Xu, Qingjun Zhang, Fengfeng Xiong, Yuanjing Li, Ziran Zhao, Yinong Liu, Yaohong Liu, Ge Li, Qiufeng Ma, Biao Cao
  • Publication number: 20220245807
    Abstract: The present disclosure provides a method of remotely measuring a size of a pupil, including: acquiring an image of a to-be-measured person by using a detection device; acquiring an image of a pupil of the to-be-measured person from the image of the to-be-measured person; measuring a distance between the to-be-measured person and the detection device by using the detection device; and calculating an actual size of the pupil of the to-be-measured person based on the measured distance and the image of the pupil of the to-be-measured person. The present disclosure further provides an apparatus for remotely measuring a size of a pupil, an electronic device, and a non-transitory computer-readable medium.
    Type: Application
    Filed: February 24, 2021
    Publication date: August 4, 2022
    Applicants: Tsinghua University, Nuctech Company Limited
    Inventors: Zhiqiang CHEN, Yuanjing LI, Jianmin LI, Xianghao WU, Bin LIU, Guocheng AN
  • Patent number: 11400407
    Abstract: The present disclosure relates to a gas purification apparatus and a trace substance detection device. The gas purification apparatus includes a first purification component, a second purification component and a switching component, wherein the switching component can be switched between a first state and a second state, the first purification component and a component to be purified form a gas purification loop in the first state, and the second purification component can provide a regeneration gas for the first purification component in the second state, so that water vapor and impurities in the first purification component are discharged to outside.
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: August 2, 2022
    Inventors: Qingjun Zhang, Yuanjing Li, Zhiqiang Chen, Ziran Zhao, Yinong Liu, Yaohong Liu, Lili Yan, Ge Li, Qiufeng Ma, Nan Bai
  • Publication number: 20220221576
    Abstract: The present disclosure provides an electromagnetic imaging device for an active microwave and millimeter wave security inspection apparatus, including: a two-dimensional multiple-input multiple-output array panel including at least one sub-array, wherein each sub-array includes a plurality of transmitting antennas arranged linearly and a plurality of receiving antennas arranged linearly, the plurality of transmitting antennas arranged linearly being intersected with the plurality of receiving antennas arranged linearly; a signal processing device; a display device; and a ranging radar. In each sub-array, a midpoint of a connection line between each transmitting antenna and a corresponding receiving antenna serves as a virtual equivalent phase center of a pair of the each transmitting antenna and the corresponding receiving antenna, and the plurality of transmitting antennas and the plurality of receiving antennas are arranged to generate an equivalent phase center web.
    Type: Application
    Filed: October 10, 2019
    Publication date: July 14, 2022
    Inventors: Ziran Zhao, Yan You, Yuanjing Li, Xuming Ma, Jian Wu
  • Patent number: 11369333
    Abstract: The present disclosure provides a method and apparatus for detecting a dose distribution of an article. The method includes performing a fluoroscopy scanning on the article to be detected, to obtain mass data per unit area or unit volume for each point of the article to be detected; obtaining corresponding dose distribution data based on the mass data per unit area or unit volume and a preset mapping model, wherein the preset mapping model includes a mapping relationship between mass per unit area or unit volume and the dose distribution of the article under irradiation of a preset amount of energy; and matching the dose distribution data with a fluoroscopy image of the article to be detected, to generate and display a radiation image.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: June 28, 2022
    Assignees: Nuctech Company Limited, Nucway Company Limited, Tsinghua University
    Inventors: Zhiqiang Chen, Yuanjing Li, Zhiwei Han, Guang Yang, Huaili Qin, Wenyuan Qi, Shan Kuang, Aifeng Liang, Yanqin Liu