公开(公告)号：US11614413B2

公开(公告)日：2023-03-28

申请号：US17255968

申请日：2020-01-03

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED ,  NUCTECH (BEIJING) COMPANY LIMITED

Inventor： Jianmin Li ,  Li Zhang ,  Yuanjing Li ,  Zhiqiang Chen ,  Hao Yu ,  Shangmin Sun ,  Bicheng Liu ,  Weizhen Wang ,  Dongyu Wang ,  Yuan Ma ,  Yu Hu ,  Chunguang Zong

IPC: G01N23/20008 ,  G01N23/203

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.

公开(公告)号：US11346975B2

公开(公告)日：2022-05-31

申请号：US16467140

申请日：2017-08-04

Applicant: NUCTECH COMPANY LIMITED

Inventor： Zhiqiang Chen ,  Ziran Zhao ,  Yaohong Liu ,  Jianping Gu ,  Qian Yi ,  Bicheng Liu ,  Guangming Xu

IPC: G01V5/00 ,  G01N23/046 ,  G01T1/29

Abstract: The present disclosure provides a spiral Computed Tomography (CT) device and a three-dimensional image reconstruction method. The spiral CT device includes: an inspection station operable to carry an object to be inspected and defining an inspection space; a rotational supporting apparatus disposed around the inspection space; a plurality of X-ray sources located on the rotational supporting apparatus; and a plurality of X-ray receiving apparatuses located on the rotational supporting apparatus and opposing to the plurality of X-ray sources respectively, wherein the plurality of X-ray sources and the plurality of X-ray receiving apparatuses are rotational synchronously with the rotational supporting apparatus, wherein the plurality of X-ray sources are closely disposed and fan-shaped X-ray beams provided by the plurality of X-ray sources cover the inspection space with a minimum degree of overlapping.

公开(公告)号：US11215626B2

公开(公告)日：2022-01-04

申请号：US16406272

申请日：2019-05-08

Applicant: TSINGHUA UNIVERSITY ,  Nuctech Company Limited

Inventor： Qingjun Zhang ,  Yuanjing Li ,  Zhiqiang Chen ,  Ziran Zhao ,  Yinong Liu ,  Yaohong Liu ,  Qiufeng Ma ,  Lili Yan ,  Weiping Zhu ,  Biao Cao

IPC: G01N35/04 ,  G01N25/54 ,  G01N35/10 ,  G01N35/00 ,  G01N1/02

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.

公开(公告)号：US11193860B2

公开(公告)日：2021-12-07

申请号：US16314063

申请日：2018-12-10

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Qingjun Zhang ,  Yuanjing Li ,  Zhiqiang Chen ,  Ziran Zhao ,  Yinong Liu ,  Yaohong Liu ,  Lili Yan ,  Ge Li ,  Qiufeng Ma

IPC: G01N1/34 ,  G01N1/22 ,  G01N1/44 ,  G01N27/622

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.

公开(公告)号：US20210330848A1

公开(公告)日：2021-10-28

申请号：US17136781

申请日：2020-12-29

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Li Zhang ,  Zhiqiang Chen ,  Qingping Huang ,  Mingzhi Hong ,  Yue Li ,  Bo Li ,  Minghua Qiu ,  Yanhua Lu

IPC: A61L2/26 ,  A61L2/10

Abstract: A tray disinfection devices for a security inspection system can include a frame, a disinfection channel on the frame, and a conveyor on the frame. An ultraviolet disinfection lamp is arranged in the disinfection channel. The conveyor on the frame is configured to convey a tray to pass through the disinfection channel so as to disinfect the tray through an irradiation of the ultraviolet disinfection lamp.

公开(公告)号：US11022581B2

公开(公告)日：2021-06-01

申请号：US16727612

申请日：2019-12-26

Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

Inventor： Qingjun Zhang ,  Yuanjing Li ,  Zhiqiang Chen ,  Jianmin Li ,  Yaohong Liu ,  Weiping Zhu ,  Qiufeng Ma ,  Biao Cao ,  Ge Li ,  Wei Wang ,  Lili Yan ,  Guangqin Li

IPC: G01N27/00 ,  G01N27/622 ,  H01J49/04

Abstract: Embodiments of the present disclosure provide an ion mobility spectrometer device. The ion mobility spectrometer device includes: an ion mobility tube, a sampling device, and a sampling and circulating gas path. The sampling device includes a solid sample desorption device and a gas sampling device. The solid sample desorption device is configured to process the solid sample into a first mixed gas containing the solid sample, and the gas sampling device is configured to process the gas sample into a second mixed gas containing the gas sample. The sampling and circulating gas path is configured to transfer the first mixed gas and/or the second mixed gas into the ion mobility tube for detection.

公开(公告)号：US20210118656A1

公开(公告)日：2021-04-22

申请号：US16947998

申请日：2020-08-27

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Qingjun Zhang ,  Zhiqiang Chen ,  Yuanjing Li ,  Jianmin Li ,  Yinong Liu ,  Yaohong Liu ,  Guangqin Li ,  Weiping Zhu ,  Ge Li ,  Qiufeng Ma ,  Biao Cao

IPC: H01J49/00 ,  H01J49/04 ,  G01N27/62

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.

公开(公告)号：US10948427B2

公开(公告)日：2021-03-16

申请号：US16231373

申请日：2018-12-21

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Ke Li ,  Jianmin Li ,  Weifeng Yu ,  Yulan Li ,  Xuejing Yang ,  Yuanjing Li ,  Chunguang Zong ,  Zhiqiang Chen ,  Li Zhang

IPC: G01N23/04

Abstract: The present disclosure provides a scanned image correction apparatus, method and a mobile scanning device. The apparatus includes an image collector, an arm swing detector, and an image processor. The image collector is configured to collect a scanned image of an object under inspection during a scanning process of scanning the object under inspection by the mobile scanning device, and determine an image parameter of the scanned image. The arm swing detector is disposed at a monitor point on a detector arm of the mobile scanning device, and configured to detect a displacement offset of the detector arm in a specified direction and build an arm swing model of the detector arm. The image processor is configured to determine a change relationship between the image parameter of the scanned image and the displacement offset of the detector arm, and correct the scanned image based on the change relationship.

公开(公告)号：US10942290B2

公开(公告)日：2021-03-09

申请号：US16626169

申请日：2019-05-16

Applicant: Nuctech Company Limited

Inventor： Li Zhang ,  Zhiqiang Chen ,  Yunda Sun ,  Xin Jin ,  Ming Chang ,  Xiaofei Xu

IPC: G01N23/20091 ,  G01V5/00

Abstract: The present application discloses an X-ray detection system and method. The detection system includes: a beam source generator, first detectors, a second detector, a collimating device and a processor. The first detectors and the second detector are alternately arranged in a transmission direction of an object to be detected. The beam source generator emits a plurality of columns of beam signals, wherein each column of beam signals comprises a plurality of beam signals; the first detectors receive a plurality of columns of transmitted beam signals passing through the object; the collimating device performs a specificity selection from a plurality of columns of scattered beam signals passing through the object; the second detector receives scattered beam signals selected by the collimating device; and the processor determines a detection result of the object according to the plurality of columns of transmitted beam signals and the selected scattered beam signals.

公开(公告)号：US10896527B2

公开(公告)日：2021-01-19

申请号：US16045303

申请日：2018-07-25

Applicant: Tsinghua University ,  NUCTECH COMPANY LIMITED

Inventor： Yuxiang Xing ,  Li Zhang ,  Jianmin Li ,  Zhiqiang Chen ,  Jianping Gu

IPC: G06T11/00 ,  G06N5/04 ,  G06N3/04 ,  G06T5/00 ,  G06N3/08

Abstract: A method and device for reconstructing a CT image and a storage medium are disclosed. CT scanning is performed on an object to be inspected to obtain projection data. The projection data is processed using a first convolutional neural network to obtain processed projection data. The first convolutional neural network comprises a plurality of convolutional layers. A back-projection operation is performed on the processed projection data to obtain a reconstructed image.