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).

  • Patent number: 11346807
    Abstract: There are provided an ion mobility spectrometer and a sniffer. The ion mobility spectrometer includes: an ion migration tube; a sampling gas path having a sampling device configured to temporarily store a sample gas collected by a sampling head in a sampling pipe; a sample introduction gas path having two ends in communication with the gas inlet and outlet of the ion migration tube respectively, and configured to introduce a carrier gas within the ion migration tube into the sampling pipe and to carry a sample gas temporarily stored in the sampling pipe into the ion migration tube; and a valve assembly configured to only allow gas to flow from the sampling device to the sampling pipe in a sampling state, and to only allow gas to flow from the ion migration tube through the sampling pipe back to the ion migration tube in a sample introduction state.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: May 31, 2022
    Assignee: Nuctech Company Limited
    Inventors: Qingjun Zhang, Yuanjing Li, Zhiqiang Chen, Jianmin Li, Yinong Liu, Yaohong Liu, Lili Yan, Biao Cao, Weiping Zhu, Ge Li, Qiufeng Ma, Qi Mao, Nan Bai
  • Patent number: 11346808
    Abstract: The present disclosure provides a trace detection device. The trace detection device includes: a box body comprising a main body frame and a top plate, the top plate and the main body frame forming a fully enclosed cavity; an ion migration tube assembly in the cavity and on a first side of the cavity; and a preamplifier and high voltage circuit board in the cavity and on a second side of the cavity, the second side being opposite to the first side.
    Type: Grant
    Filed: July 21, 2020
    Date of Patent: May 31, 2022
    Assignees: Nuctech Company Limited, Tsinghua University
    Inventors: Qingjun Zhang, Yuanjing Li, Zhiqiang Chen, Jianmin Li, Yinong Liu, Yaohong Liu, Yanqin Zhao, Lili Yan, Biao Cao, Qiufeng Ma, Ge Li
  • Patent number: 11327198
    Abstract: The present disclosure relates to the technical field of CT detection, in particular to a CT inspection system and a CT imaging method. The CT inspection system provided by the present disclosure includes a scanning device and an imaging device, wherein the scanning device having a radioactive source device and a detection device is configured to rotate at a nonuniform speed in at least partial process of scanning an object to be detected; and the imaging device generates a CT image based on effective detection data, wherein the effective detection data refer to data acquired each time the detection device rotates by a preset angle. In the present disclosure, the imaging device of the CT inspection system generates a CT image based on data acquired each time the detection device rotates by a preset angle, which, compared with traditional image collection solutions, can effectively reduce image deformation and improve accuracy of detection results.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: May 10, 2022
    Inventors: Xiulin Ni, Jianmin Li, Haitian Tan, Yulan Li, Weifeng Yu, Yuanjing Li, Hejun Zhou, Zhiqiang Chen, Chunguang Zong, Li Zhang
  • Patent number: 11320407
    Abstract: The present disclosure discloses a gas chromatograph-ion mobility spectrometry combined equipment, including: a gas chromatograph device for pre-separating a to-be-detected sample to form a pre-separated sample; an ion mobility spectrometry device in fluid communication with an outlet of the gas chromatograph device for detecting the pre-separated sample; and a gas circulating device in fluid communication with a discharged gas interface of the ion mobility spectrometry device for processing a discharged gas from the ion mobility spectrometry device, wherein the gas circulating device is further in gas communication with the gas chromatograph device for conveying a part of the discharged gas to the gas chromatograph device to serve as a carrier gas, which drives the to-be-detected sample to enter the gas chromatograph device. The miniaturization and the portability of the gas chromatograph-ion mobility spectrometry combined equipment are improved.
    Type: Grant
    Filed: December 16, 2019
    Date of Patent: May 3, 2022
    Inventors: Qingjun Zhang, Yuanjing Li, Zhiqiang Chen, Weiping Zhu, Yaohong Liu, Qiufeng Ma, Ge Li, Biao Cao, Lili Yan
  • Publication number: 20220109241
    Abstract: The present disclosure provides a terahertz mixer, a method of manufacturing the terahertz mixer, and an electronic device including the mixer. The terahertz mixer includes: a cavity for forming a radio frequency input waveguide and a local oscillator input waveguide, and for accommodating a microstrip line; the microstrip line formed on at least a part of an inner surface of the cavity by using a semiconductor growth process, wherein the microstrip line extends into a portion of the cavity where the radio frequency input waveguide is located so as to form a microstrip antenna for receiving a radio frequency input signal, and into a portion of the cavity where the local oscillator input waveguide is located so as to form a microstrip antenna for receiving a local oscillator input signal.
    Type: Application
    Filed: October 10, 2019
    Publication date: April 7, 2022
    Applicant: NUCTECH COMPANY LIMITED
    Inventors: Yuanjing LI, Haifan HU, Ziran ZHAO, Xuming MA
  • Publication number: 20220099601
    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: Application
    Filed: January 3, 2020
    Publication date: March 31, 2022
    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: 11226429
    Abstract: An extensible millimeter wave security inspection system, a security inspection method for a human body using the extensible millimeter wave security inspection system and an extensible millimeter wave scanning unit are disclosed. The extensible millimeter wave security inspection system includes at least one security inspection passage, at least one scanning units are provided on at least one side of two sides of each security inspection passage, each scanning unit includes at least one millimeter wave transceiving module, the millimeter wave transceiving module includes an array of millimeter wave antennas configured to transmit and receive millimeter wave signals and a millimeter wave transceiver associated with the array of millimeter wave antennas, and the millimeter wave transceiving module is arranged to scan by millimeter wave a target to be inspected in the security inspection passage along a direction in which the security inspection passage extends.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: January 18, 2022
    Assignee: Nuctech Company Limited
    Inventors: Zhiqiang Chen, Ziran Zhao, Yuanjing Li, Xilei Luo, Yingkang Jin, Zhimin Zheng, Wanlong Wu, Lingbo Qiao, Wenguo Liu
  • Patent number: 11215626
    Abstract: The present disclosure provides a gate system for sample detection and a method of sample inspection, which relate to the field of detection and analysis technology. The gate system comprises: an accommodating apparatus configured to accommodate an inserted ticket to be detected; a wipe sampling apparatus including a wipe sampling belt which is configured to drive the ticket to be detected to move within the accommodating apparatus and to conduct a wipe sampling to the ticket; an inspiratory sampling apparatus configured to collect samples dropped from the wipe sampling apparatus; and a detection apparatus configured to detect the samples and output detection results. The gate system for sample detection and the method of sample inspection provided by the present disclosure have a wide range of applications and can perform rapid sampling and detection to those substances that are difficult to be volatilized.
    Type: Grant
    Filed: May 8, 2019
    Date of Patent: January 4, 2022
    Assignees: TSINGHUA UNIVERSITY, NUCTECH COMPANY LIMITED
    Inventors: Qingjun Zhang, Yuanjing Li, Zhiqiang Chen, Ziran Zhao, Yinong Liu, Yaohong Liu, Qiufeng Ma, Lili Yan, Weiping Zhu, Biao Cao
  • Publication number: 20210404988
    Abstract: There are provided an ion mobility spectrometer and a sniffer. The ion mobility spectrometer includes: an ion migration tube; a sampling gas path having a sampling device configured to temporarily store a sample gas collected by a sampling head in a sampling pipe; a sample introduction gas path having two ends in communication with the gas inlet and outlet of the ion migration tube respectively, and configured to introduce a carrier gas within the ion migration tube into the sampling pipe and to carry a sample gas temporarily stored in the sampling pipe into the ion migration tube; and a valve assembly configured to only allow gas to flow from the sampling device to the sampling pipe in a sampling state, and to only allow gas to flow from the ion migration tube through the sampling pipe back to the ion migration tube in a sample introduction state.
    Type: Application
    Filed: June 12, 2019
    Publication date: December 30, 2021
    Applicant: NUCTECH COMPANY LIMITED
    Inventors: Qingjun ZHANG, Yuanjing LI, Zhiqiang CHEN, Jianmin LI, Yinong LIU, Yaohong LIU, Lili YAN, Biao CAO, Weiping ZHU, Ge LI, Qiufeng MA, Qi MAO, Nan BAI
  • Publication number: 20210394366
    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: Application
    Filed: June 22, 2021
    Publication date: December 23, 2021
    Inventors: Zhiqiang CHEN, Ziran ZHAO, Yan YOU, Yuanjing LI, Shixin ZHANG, Huan XIE, Xuming MA, Rui FAN, Yinglei WANG
  • Patent number: 11193860
    Abstract: Embodiments of the present disclosure provide a gas purifying device and an ion migration spectrometer. The gas purifying device includes a first purificant vessel, a second purificant vessel and a valve communicated between the first purificant vessel and the second purificant vessel. The valve is configured to allow a gas flows from the second purificant vessel to the first purificant vessel in a first state and to permit the gas to flow from the first purificant vessel to the second purificant vessel in a second state.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: December 7, 2021
    Assignees: Nuctech Company Limited, Tsinghua University
    Inventors: Qingjun Zhang, Yuanjing Li, Zhiqiang Chen, Ziran Zhao, Yinong Liu, Yaohong Liu, Lili Yan, Ge Li, Qiufeng Ma
  • Publication number: 20210364455
    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: Application
    Filed: January 3, 2020
    Publication date: November 25, 2021
    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
  • Patent number: 11169257
    Abstract: A security inspection system and a security inspection method are disclosed. The system includes: at least one inspection sub-system configured to perform ray scanning on an object to be inspected; at least one on-site image processing computer communicatively connected to the at least one inspection sub-system, and configured to store and process a radiographic image in real time; and at least one remote image processing computer communicatively connected to the at least one on-site image processing computer via at least one of a public network and a dedicated network. The at least one remote image processing computer each is configured to log in one of the at least one on-site image processing computer through remote access to synchronize remote data on a screen of the on-site image processing computer to the remote image processing computer.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: November 9, 2021
    Assignee: Nuctech Company Limited
    Inventors: Zhiqiang Chen, Yuanjing Li, Xianghao Wu, Shaozhi Zhao
  • Publication number: 20210333224
    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: Application
    Filed: May 29, 2019
    Publication date: October 28, 2021
    Inventors: Yigang YANG, Xuewu WANG, Zhi ZHANG, Yuanjing LI, Jianmin LI
  • Publication number: 20210325561
    Abstract: The application describes a security inspection apparatus and a method of controlling the same. An example security inspection apparatus includes a body fixed in the field and an electromagnetic imaging device installed on the body. The electromagnetic imaging device includes a two-dimensional multi-input multi-output array panel, including at least one two-dimensional multi-input multi-output sub-array and a control circuit. Each two-dimensional multi-input multi-output sub-array includes transmitting antennas and receiving antennas, with the transmitting antennas and the transmitting antennas being arranged such that equivalent phase centers are arranged in a two-dimensional array. The electromagnetic imaging device further includes a signal processing device configured to reconstruct an image of an inspected object based on an echo signal received and a display device configured to display the reconstructed image of the inspected object.
    Type: Application
    Filed: June 28, 2021
    Publication date: October 21, 2021
    Inventors: Ziran Zhao, Yan You, Yuanjing Li, Xuming Ma, Jian Wu
  • Publication number: 20210286842
    Abstract: A semantic-based method and apparatus for retrieving a perspective image, an electronic device and a computer-readable storage medium are provided. An method includes obtaining a perspective image for a space containing an inspected object therein. A semantic division on the perspective image is performed using a first method, to obtain a plurality of semantic region units. A feature extraction network is constructed using a second method. Based on the perspective image and each of the plurality of semantic region units, a feature of each semantic region unit is extracted using the feature extraction network. Based on the feature of each semantic region unit, an image most similar to the semantic region unit is retrieved from an image feature database, to assist in determining an inspected object in the semantic region unit.
    Type: Application
    Filed: March 15, 2021
    Publication date: September 16, 2021
    Inventors: Li Zhang, Zhiqiang Chen, Yuanjing Li, Yuxiang Xing, Fanhua Meng, Qiang Li, Wei Li, Gang Fu
  • Patent number: 11104309
    Abstract: A fork-arm lift tractor includes a vehicle body, a supporting plate disposed above the vehicle body, a lifting device for driving the supporting plate to be lifted, a front and rear fork-arm assemblies, a front and rear fork-arm drive assemblies. The front fork-arm assembly includes two front fork-arms rotatably disposed at the supporting plate. The rear fork-arm assembly includes two rear fork-arms rotatably disposed at the supporting plate, and the front and rear fork-arms may be deployed or retracted from both sides of the supporting plate. The front fork-arm driving assembly includes a front transmission part, and a front power device disposed at the supporting plate and may drive the front transmission part to move horizontally linearly so as to rotate the two front fork-arms. The rear fork-arm driving assembly has almost the same structure of the front fork-arm driving assembly and is used to rotate the two rear fork-arms.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: August 31, 2021
    Assignees: TSINGHUA UNIVERSITY, NUCTECH COMPANY LIMITED
    Inventors: Yuan He, Jianmin Li, Hongqi Li, Yulan Li, Qiangqiang Wang, Yuanjing Li, Zhiqiang Chen, Li Zhang
  • Publication number: 20210222461
    Abstract: The present disclosure provides an intelligent lock.
    Type: Application
    Filed: January 13, 2020
    Publication date: July 22, 2021
    Inventors: Zhiqiang Chen, Yuanjing Li, Xianghao Wu, Shiguo Liu, Dawei Shi
  • Publication number: 20210215582
    Abstract: Embodiments of the present disclosure provide a gas purifying device and an ion migration spectrometer. The gas purifying device includes a first purificant vessel, a second purificant vessel and a valve communicated between the first purificant vessel and the second purificant vessel. The valve is configured to allow a gas flows from the second purificant vessel to the first purificant vessel in a first state and to permit the gas to flow from the first purificant vessel to the second purificant vessel in a second state.
    Type: Application
    Filed: December 10, 2018
    Publication date: July 15, 2021
    Inventors: Qingjun ZHANG, Yuanjing LI, Zhiqiang CHEN, Ziran ZHAO, Yinong LIU, Yaohong LIU, Lili YAN, Ge LI, Qiufeng MA
  • Patent number: 11054542
    Abstract: Embodiments of the disclosure provide a multi-ray-source accelerator and an inspection method. The multi-ray-source accelerator includes: a plurality of acceleration tubes, each acceleration tube of the plurality of acceleration tubes including an acceleration tube body that defines at least one cavity, the plurality of acceleration tubes being arranged in at least one row along a straight line or an arc and connected in series with each other; and a microwave unit configured to provide a microwave field to the plurality of acceleration tubes. The plurality of acceleration tubes are arranged to allow the microwave unit to provide the microwave field from an acceleration tube at one end of the plurality of acceleration tubes so as to accelerate electron beams in cavities of all the acceleration tubes.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: July 6, 2021
    Assignees: Tsinghua University, Nuctech Company Limited
    Inventors: Kejun Kang, Huaibi Chen, Yaohong Liu, Chuanxiang Tang, Yuanjing Li, Hao Zha, Liang Zhang