Patents Assigned to Nuctech Company Limited
  • Publication number: 20200168428
    Abstract: An anode target, a ray light source, a computed tomography device, and an imaging method, which relate to the technical field of ray processing. The anode target comprises a first anode target, a second anode target, and a ceramic plate. The first anode target is used for enabling, by means of a first voltage carried on the first anode target, an electron beam emitted by a cathode to generate a first ray on a target spot of the first anode target. The second anode target is used for enabling, by means of a second voltage carried on the second anode target, an electron beam emitted by the cathode to generate a second tray on a target spot of the second anode. The ceramic plate is used for isolating the first anode target from the second anode target. By means of the anode target, the ray light source, the computed tomography device and the imaging method, dual-energy distributed ray imaging data can be provided and the imaging quality of a ray system can be improved.
    Type: Application
    Filed: September 13, 2018
    Publication date: May 28, 2020
    Applicants: Nuctech Company Limited, TSINGHUA UNIVERSITY
    Inventors: Chengjun TAN, Wenhui HUANG, Chuanxiang TANG, Qingxiu JIN, Dongsheng ZHANG, Qun LUO, Donghai LIU, Luming ZHANG, Peidong WU
  • Publication number: 20200168426
    Abstract: An anode target comprises: a plurality of target structures, used for receiving an electron beam emitted by a cathode to generate a ray, the plurality of target structures being of three-dimensional structures having bevels; a copper cooling body, used for bearing the target structures and comprising an oxygen-free copper cooling body; a cooling oil tube, used for cooling the anode target; and a shielding layer, used for achieving a shielding effect and comprising a tungsten shielding layer. The anode target, the ray light source, the computed tomography scanning device, and the imaging method in the present application are able to enable all target spots on the anode target to be distributed on a straight line, imaging quality of a ray system is improved, and complexity of an imaging system is reduced.
    Type: Application
    Filed: June 1, 2018
    Publication date: May 28, 2020
    Applicants: Nuctech Company Limited, TSINGHUA UNIVERSITY
    Inventors: Chengjun TAN, Wenhui HUANG, Chuanxiang TANG, Qingxiu JIN, Dongsheng ZHANG, Qun LUO, Donghai LIU, Luming ZHANG, Peidong WU
  • Publication number: 20200170097
    Abstract: A distributed X-ray light source comprises: a plurality of arranged cathode assemblies used for emitting electron beams; an anode target used for receiving the electron beams emitted by the cathode assemblies; and compensation electrodes and focusing electrodes provided in sequence between the plurality of the cathode assemblies and the anode target, the compensation electrode being used for adjusting electric field strength at two ends of a grid structure in each cathode assembly, and the focusing electrode being used for focusing the electron beams emitted by the cathode assemblies, wherein the focusing electrode corresponding to at least one cathode assembly in the plurality of the cathode assemblies comprises a first electrode and a second electrode which are separately provided, and an electron beam channel is formed between the first electrode and the second electrode.
    Type: Application
    Filed: May 29, 2018
    Publication date: May 28, 2020
    Applicants: Nuctech Company Limited, TSINGHUA UNIVERSITY
    Inventors: Chengjun TAN, Wenhui HUANG, Chuanxiang TANG, Qingxiu JIN, Dongsheng ZHANG, Qun LUO, Donghai LIU, Luming ZHANG, Peidong WU
  • Patent number: 10663413
    Abstract: A method for inspecting a container and an inspection device are disclosed. X-ray scanning is performed on the inspected container to obtain a scanned image. The scanned image is processed to obtain a region of interest. Features of texture units included in the region of interest are calculated. Local descriptions of the texture units are formed based on the features of the texture units. Distinction of each local point is calculated from a local description of each of the texture units so as to obtain a local distinct map of the region of interest. It is determined whether there is an article which is secretly carried in the inspected container using the local distinct map.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: May 26, 2020
    Assignees: Nuctech Company Limited, Tsinghua University
    Inventors: Qiang Li, Jianping Gu, Bin Xu, Yaohong Liu, Ziran Zhao
  • Patent number: 10663429
    Abstract: The present disclosure provides a device for collecting semi-volatile or non-volatile substance, including an air nozzle, a front cavity and a collecting body. The air nozzle is configured to eject air to a sample attachment surface. The front cavity has an upper port. The collecting body is sealingly connected to a lower end of the front cavity, inside of which is provided with a cylindrical cavity and a conical cavity arranged vertically coaxially, and bottom of which is provided with a sample outlet. The collecting body is provided with an air intake passage which is non-coplanar with respect to an axis of the cylindrical cavity and is disposed obliquely downward and inward. The collecting body is further provided with an air exhaust passage one end of which is a discharge port connected to the interior of the cylindrical cavity, the other end is connected to an air pump.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: May 26, 2020
    Assignee: NUCTECH COMPANY LIMITED
    Inventors: Qingjun Zhang, Yuanjing Li, Zhiqiang Chen, Ziran Zhao, Yinong Liu, Yaohong Liu, Ge Li, Jingli Xie, Qiufeng Ma, Biao Cao
  • Patent number: 10663607
    Abstract: The present disclosure provides an apparatus for processing signals for a plurality of energy regions, and a system and method for detecting radiation of a plurality of energy regions. The apparatus for processing signals for a plurality of energy regions may comprise: a first processor, configured to receive a signal from a detector and process the received signal to generate a gated signal, wherein a turn-on period of the gated signal represents magnitude of the received signal; and a second processor, configured to receive the gated signal from the first processor, and determine one of the plurality of energy regions to which the received signal belongs according to the turn-on period of the gated signal, so as to count signals within the determined energy region.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: May 26, 2020
    Assignee: Nuctech Company Limited
    Inventors: Lan Zhang, Yingshuai Du, Bo Li, Zonggui Wu, Jun Li, Xuepeng Cao, Haifan Hu, Jianping Gu, Guangming Xu, Bicheng Liu
  • Patent number: 10663393
    Abstract: An embodiment of the present disclosure provides a spectrum inspecting apparatus. The apparatus includes a laser source; a focusing cylindrical lens configured to converge a light beam onto a sample; a light beam collecting device configured to collect a light beam signal, which is excited by the light beam, from the sample, so as to form a strip-shaped light spot; a slit configured to receive the collected light beam and couple it to downstream of a light path; a collimating device; a dispersing device configured to disperse the collected light beam so as to form a plurality of sub-beams having different wavelengths; an imaging device configured to image the sub-beams on the photon detector array respectively, wherein the light beam emitted from the laser source has a rectangular cross-section, the strip-shaped light spot impinges on the slit and its length is smaller than a length of the slit.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: May 26, 2020
    Assignee: Nuctech Company Limited
    Inventors: Haihui Liu, Hongqiu Wang, Yumin Yi, Jianhong Zhang, Ankai Wang
  • Patent number: 10658088
    Abstract: A collimator and an inspection system having the collimator are disclosed. The collimator includes: a collimator body including a first part and a second part; a collimating slit formed between the first part and the second part and having a first end and a second end in a longitudinal direction thereof; and a shielding member which is movable relative to the collimator body such that both a beam divergent angle and an elevation angle of a ray beam propagating through the collimating slit are varied. An inspection system and an inspection method for scanning a vehicle are further disclosed.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: May 19, 2020
    Assignees: TSINGHUA UNIVERSITY, NUCTECH COMPANY LIMITED
    Inventors: Kejun Kang, Ying Li, Jianmin Li, Yulan Li, Guoping Zhu
  • Patent number: 10654196
    Abstract: A mold and a method of manufacturing GOS ceramic scintillator by using the mold are provided. The mold comprises: a female outer sleeve having a cavity disposed inside; a plurality of female blocks disposed inside the cavity, the plurality of female blocks being put together to form a composite structure having a vertical through hole; and a male upper pressing head and a male lower pressing head, wherein each of the male upper pressing head and the male lower pressing head has a shape consistent with that of the vertical through hole. The disclosure may reduce defects of the related art in hot-pressing-sintering such as a mold has a short retirement period and a high material waste, significantly reduce the cost for production of the GOS ceramic scintillator, and significantly improve a process economy.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: May 19, 2020
    Assignee: NUCTECH COMPANY LIMITED
    Inventors: Yanchun Wang, Qingjun Zhang, Yuanjing Li, Zhiqiang Chen, Ziran Zhao, Yinong Liu, Yaohong Liu, Nan Bai
  • Publication number: 20200150086
    Abstract: A gas path flow monitoring apparatus for an ion mobility spectrometer includes: an ion migration tube, a sensor group, and monitoring device. The ion migration tube has a drift gas inlet, a carrier gas inlet for a sample gas, and an exhaust outlet. The sensor group comprises a drift gas intake quantity sensor connected to the drift gas inlet, a carrier gas intake quantity sensor connected to the carrier gas inlet, and an exhaust quantity sensor connected to the exhaust outlet. The monitoring device is connected to the sensor group to monitor a drift gas intake quantity sensed by the drift gas intake quantity sensor, a carrier gas intake quantity sensed by the carrier gas intake quantity sensor, and an exhaust quantity sensed by the exhaust quantity sensor.
    Type: Application
    Filed: January 25, 2019
    Publication date: May 14, 2020
    Applicants: TSINGHUA UNIVERSITY, Nuctech Company Limited
    Inventors: Qingjun ZHANG, Yuanjing LI, Zhiqiang CHEN, Ziran ZHAO, Yinong LIU, Yaohong LIU, Honghui XIN, Biao CAO, Nan BAI, Wei WANG, Qiufeng MA
  • Patent number: 10649104
    Abstract: A method and apparatus for reconstructing an incident energy spectrum for a detector are disclosed. In this method, an object to be inspected is illuminated with rays, and then rays transmitted through the object to be inspected are received by the detector to convert the received rays into data of a detected energy spectrum. The incident energy spectrum for the detector is reconstructed based on the data of the energy spectrum using a statistical iterative algorithm with a pre-established detector response function. With the above solution of the embodiments, the incident energy spectrum for the detector can be more accurately acquired, thereby reducing a distortion of the incident energy spectrum caused by the detector.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: May 12, 2020
    Assignees: Tsinghua University, Nuctech Company Limited
    Inventors: Liang Li, Zhiqiang Chen, Li Zhang, Ziran Zhao, Yuxiang Xing, Kejun Kang, Lan Zhang, Ruizhe Li
  • Patent number: 10648929
    Abstract: Embodiments of the present invention provide a trailed multiple-viewing-angle item inspection system and method of operating the same. The inspection system includes: a trailer vehicle, a radiation inspection device, a power supply device and a power grid connection device. The trailer vehicle is mounted with a power supply chamber within which a power supply device and a power grid connection device are mounted and an inspection chamber within which a radiation inspection device is mounted. The radiation inspection device includes: ray radiation source configured to emit X-rays from various positions, detectors, a body frame, a transfer device, a data and image process system and a display and operation device.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: May 12, 2020
    Assignee: NUCTECH COMPANY LIMITED
    Inventors: Huaping Tang, Zhiqiang Chen, Yuanjing Li, Xin Jin, Zhuoyan Liu, Yonggang Wang, Hua Peng, Zhanfeng Qin
  • Patent number: 10646179
    Abstract: The present disclosure provides a method for recognizing an article using a multi-energy spectrum X-ray imaging system and a multi-energy spectrum X-ray imaging system. The method comprises: recognizing an application scenario and/or priori information of the article; selecting a parameter mode suitable for the article from a plurality of parameter modes stored in the multi-energy spectrum X-ray imaging system based on the recognized application scenario and/or priori information; and recognizing the article using the selected parameter mode, wherein the plurality of parameter modes are obtained by optimizing system parameters of the multi-energy spectrum X-ray imaging system under a specific condition using a training sample library for various articles.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: May 12, 2020
    Assignee: NUCTECH COMPANY LIMITED
    Inventors: Guangming Xu, Bicheng Liu, Ziran Zhao, Lan Zhang, Jianping Gu
  • Patent number: 10641715
    Abstract: An X-ray imaging system and method are provided. The system may include: an X-ray source configured to irradiate X-ray beams; a first grating and a second grating arranged sequentially in an irradiation direction of the X-ray beams; a detector arranged at downstream of the second grating in the irradiation direction; and a controller and data processing device configured to control the X-ray source to irradiate the X-ray beams, to control the detector to receive X-ray beams passing through the first grating and the second grating to generate phase contrast information and/or dark field information, and to perform CT check on an object under check based on the phase contrast information and/or the dark field information to obtain a CT image. In this way, it is possible to obtain more characteristic information about the object under check, so as to achieve more precise material recognition and security check.
    Type: Grant
    Filed: December 23, 2015
    Date of Patent: May 5, 2020
    Assignees: Nuctech Company Limited, Tsinghua University
    Inventors: Zhiqiang Chen, Li Zhang, Le Shen, Qingping Huang, Xin Jin
  • Patent number: 10641709
    Abstract: A Raman spectrum inspection apparatus and a security monitoring method for a Raman spectrum inspection apparatus are provided. The Raman spectrum inspection apparatus includes: a laser device configured to emit an exciting light; an optical device configured to guide the exciting light to an object to be detected and collect a light signal from the object; a spectrometer configured to split the collected light signal to generate a Raman spectrum of the object; and a security detector configured to detect an infrared light emitted from the object.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: May 5, 2020
    Assignee: Nuctech Company Limited
    Inventors: Jianhong Zhang, Ankai Wang, Hongqiu Wang, Rui Fan, Huacheng Feng
  • Patent number: 10641717
    Abstract: This invention relates to a movable article inspection system and inspection method, wherein the inspection system comprises: a first automated guided vehicle, a radiation source and a detection mechanism; said radiation source and said detection mechanism are both mounted on said first automated guided vehicle, said first automated guided vehicle is able to move to a preset scanning inspection position, such that scanning inspection of said article to be scanned is effectuated by means of relative movement between an article to be scanned and the first automated guided vehicle. Such movable inspection system based on an automated guided vehicle is capable of making full use of an existing automated guided vehicle and its control system to make a movement path of the inspection system more flexible, and capable of effectuating centralized control and management of the inspection system, so that it can improve inspection efficiency, and save labor cost.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: May 5, 2020
    Assignee: Nuctech Company Limited
    Inventors: Zhiqiang Chen, Yuanjing Li, Shangmin Sun, Yu Hu, Xuejing Yang, Qiangqiang Wang, Long Du, Wei Li
  • Patent number: 10643759
    Abstract: The disclosure relates to a grating and a radiation imaging device. The grating comprises a plurality of stacked grating elements. The grating elements are stacked to form a grid. The grating element comprises a first sheet and a second sheet having two parallel planes. The second sheet is stacked at the first sheet in a length direction of the first sheet. The first sheet is almost impervious to radiation. The present disclosure stacks the sheets having different specifications together to form the grating with uniform grating slits, such that there is no limitation on the thickness of the grating and the grating can be used along with high-energy radiations.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: May 5, 2020
    Assignees: Nuctech Company Limited, Tsinghua University
    Inventors: Li Zhang, Mingzhi Hong, Qingping Huang, Le Shen
  • Publication number: 20200135356
    Abstract: The disclosure provides a collimator assembly, comprising at least at least two collimators configured to be moveable relative to each other such that the collimator assembly is switchable between at least two collimation modes; in respective collimation modes, the at least two collimators are superposed with each other in a thickness direction of the collimator assembly, such that the collimator assembly presents different combined patterns for collimating and shielding rays incident onto the collimator assembly and that the collimator assembly has corresponding ray shielding thickness for effectively shielding rays.
    Type: Application
    Filed: October 30, 2019
    Publication date: April 30, 2020
    Applicant: NUCTECH COMPANY LIMITED
    Inventors: Hanping LI, Yuecheng HU, Kun ZHAO
  • Patent number: 10634627
    Abstract: An autonomously mobile backscatter detection apparatus and method is disclosed. In one aspect, the apparatus includes a mobile platform configured to move freely in a horizontal plane. The apparatus further includes a backscatter detection imaging apparatus, arranged on the mobile platform, configured to acquire an image of an item to be inspected.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: April 28, 2020
    Assignee: Nuctech Company Limited
    Inventors: Ziran Zhao, Zhiqiang Chen, Dong Lin, An Cang, Jin Cui, Bin Hu, Chaoyan Zhang
  • Patent number: 10634810
    Abstract: The disclosure provides a scanning imaging system for security inspection of an object and an imaging method thereof, the system comprising: a conveying unit configured for bringing the object to move along a conveying direction; a plurality of radiographic sources at one side of the conveying unit, being arranged successively in a direction vertical to a plane, in which the conveying unit is located, and configured for alternately emitting ray beams to form a scanning area; a linear detector array at the other side of the conveying unit, being configured for detecting first projection images, which are formed after the ray beams emitted by the plurality of radiographic sources penetrate through the object, in the process of the object passing through the scanning area; an imaging unit configured for obtaining a first reconstructed image of the object based on the first projection images of the plurality of radiographic sources.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: April 28, 2020
    Assignees: Nuctech Company Limited, Tsinghua University
    Inventors: Li Zhang, Zhiqiang Chen, Le Shen, Qingping Huang, Yunda Sun, Xin Jin, Hui Ding, Yuxiang Xing