公开(公告)号：US10775278B2

公开(公告)日：2020-09-15

申请号：US15826098

申请日：2017-11-29

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Qingjun Zhang ,  Yuanjing Li ,  Ziran Zhao ,  Ge Li ,  Qiufeng Ma

IPC: G01N1/22 ,  G06K13/08 ,  G01N33/00 ,  G01N1/02

Abstract: It is disclosed a scrubbing and sampling device, a card reader apparatus and a gate apparatus. The scrubbing and sampling device includes: a scrubbing and sampling portion including a first wheel and a second wheel, which are respectively capable of rotating around respective rotating axes, and a scrubbing conveyor belt tensioned by the first wheel and the second wheel and driven by rotation of the first wheel and the second wheel, to move between them; and an desorbing portion configured to desorb properties of an sample that is conveyed into the desorbing portion. The scrubbing conveyor belt is configured to move through the desorbing portion such that the desorbing portion desorbs the sample on the scrubbing conveyor belt when the scrubbing conveyor belt enters the desorbing portion.

公开(公告)号：US10663429B2

公开(公告)日：2020-05-26

申请号：US16235340

申请日：2018-12-28

Applicant: Nuctech Company Limited ,  TSINGHUA UNIVERSITY

Inventor： Qingjun Zhang ,  Yuanjing Li ,  Zhiqiang Chen ,  Ziran Zhao ,  Yinong Liu ,  Yaohong Liu ,  Ge Li ,  Jingli Xie ,  Qiufeng Ma ,  Biao Cao

IPC: H01J49/00 ,  G01N27/62 ,  G01N1/22 ,  G01N1/24

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.

公开(公告)号：US10649104B2

公开(公告)日：2020-05-12

申请号：US15597003

申请日：2017-05-16

Applicant: Tsinghua University ,  NUCTECH COMPANY LIMITED

Inventor： Liang Li ,  Zhiqiang Chen ,  Li Zhang ,  Ziran Zhao ,  Yuxiang Xing ,  Kejun Kang ,  Lan Zhang ,  Ruizhe Li

IPC: G01T1/36 ,  G01N23/223 ,  G01T7/00

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.

公开(公告)号：US10585052B2

公开(公告)日：2020-03-10

申请号：US15609012

申请日：2017-05-31

Applicant: NUCTECH COMPANY LIMITED

Inventor： Zhiqiang Chen ,  Ziran Zhao ,  Jin Cui ,  Dong Lin ,  Bin Hu ,  Xianshun Tan ,  Hong Wang

IPC: G01N23/00 ,  G01N23/203 ,  G01V5/00

Abstract: The present disclosure proposes a security inspection apparatus and method, relates to the technical field of radiation, wherein the security inspection apparatus of the disclosure includes: radiation emitting device, back-scatter detector, size-distance detecting device, orientation adjusting device; the back-scatter detector located between the radiation emitting device and an inspected object; the size-distance detecting device located between the radiation emitting device and the inspected object, for detecting a size of the inspected object and/or a distance between the inspected object and the size-distance detecting device; and the orientation adjusting device adjusts orientation of the radiation emitting device according to the size of the inspected object and/or the distance from the inspected object.

公开(公告)号：US10578765B2

公开(公告)日：2020-03-03

申请号：US16253221

申请日：2019-01-22

Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Kejun Kang ,  Yaohong Liu ,  Ziran Zhao ,  Wei Jia ,  Jianping Gu ,  Chuanxiang Tang ,  Huaibi Chen ,  Jianjun Gao ,  Wei Yin ,  Xiying Liu

IPC: G01V5/00 ,  G01T1/29 ,  G01N23/04

Abstract: This invention provides a scan method, scan system and radiation scan controller, and relates to the field of radiation. The scanning method includes obtaining detection data of an object to be inspected under radiation scanning using a detector, adjusting an accelerator output beam dose rate and/or an output electron beam energy level of a radiation emission device according to the detection data. With this method, working conditions of the accelerator of the radiation emission device may be adjusted according to the detection data detected by the detector, so that for a region having a larger mass thickness, a higher output beam dose rate or a higher electron beam output energy level is adopted to guarantee satisfied imaging technical indexes, for a region having a smaller mass thickness, a lower output beam dose rate or a lower electron beam output energy level is adopted to reduce the environmental dose level while guaranteeing satisfied imaging technical indexes.

公开(公告)号：US10422889B2

公开(公告)日：2019-09-24

申请号：US15856303

申请日：2017-12-28

Applicant: Nuctech Company Limited

Inventor： Bozhen Zhao ,  Qingjun Zhang ,  Ziran Zhao ,  Shuwei Li ,  Lifeng Sun ,  Wenjian Zhang

IPC: G01T1/20

Abstract: A radiation detector assembly and a method of manufacturing the same are provided. The radiation detector assembly includes a base and an outer encapsulation layer. The base includes a scintillator having a light-entering surface and a light-exiting surface on both ends thereof, respectively; a reflection layer provided on the light-entering surface and an outer peripheral surface of the scintillator; a photosensor comprising a photosensitive surface and an encapsulation housing, the photosensitive surface is coupled to the light-exiting surface via an optical adhesive; and an inner encapsulation layer adhered to an outer surface of the reflection layer and hermetically encapsulates a coupling portion where the scintillator and the photosensor connected with each other. The outer encapsulation layer is provided on the outer surface of the base.

公开(公告)号：US10408804B2

公开(公告)日：2019-09-10

申请号：US15276595

申请日：2016-09-26

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Qingjun Zhang ,  Yuanjing Li ,  Zhiqiang Chen ,  Ziran Zhao ,  Weiping Zhu ,  Yaohong Liu ,  Qiufeng Ma ,  Xiang Zou ,  Huishao He ,  Jianping Chang ,  Song Liang

IPC: G01N30/72 ,  G01N23/085 ,  G01B15/00 ,  G01N30/84

Abstract: A darkroom type security inspection apparatus and a method of performing an inspection using the darkroom type security inspection apparatus. An apparatus includes a housing constituting a closed darkroom, and assemblies disposed inside the housing. The assemblies disposed inside the housing include: a sample collecting unit configured to collect a sample, a conveyor unit, and a X-ray detection unit to detect a position of the objected to be inspected, wherein the X-ray detection unit is configured to determine the position of the objected to be inspected within the sampling assembly so that the object to be inspected together with the conveyor unit is conveyed to an expected position; and a sample processing assembly, wherein the assemblies disposed inside the housing are communicated by fittings or connectors.

公开(公告)号：US10379252B2

公开(公告)日：2019-08-13

申请号：US15217787

申请日：2016-07-22

Applicant: Tsinghua University ,  NUCTECH COMPANY LIMITED

Inventor： Zhiqiang Chen ,  Yuanjing Li ,  Li Zhang ,  Ziran Zhao ,  Yaohong Liu ,  Juan Zheng ,  Jianping Gu ,  Chunguang Zong

IPC: G01V5/00 ,  G01N23/04 ,  G01N23/046 ,  G01N23/06 ,  G01N23/083 ,  G01N23/087 ,  G01N23/10 ,  G01V5/12

Abstract: Disclosed is a method and device for estimating weight of an object to be inspected in an inspection system. An effective atomic number and a high-energy gray value of the dual-energy corresponding to each pixel of the object to be inspected are obtained by a dual-energy radiation scanning. A mass-thickness value for a corresponding pixel is obtained from a pre-created mass-thickness attenuation curve by utilizing the effective atomic numbers and the high-energy gray value of the dual-energy for respective pixels. Weight information for at least a part of the object to be inspected is calculated by multiplying the mass-thickness value by the area of the pixel. Such a method may accurately calculate the weight of the object to be inspected and save the cost for a conventional weighing hardware.

公开(公告)号：US10371854B2

公开(公告)日：2019-08-06

申请号：US15230316

申请日：2016-08-05

Applicant: NUCTECH COMPANY LIMITED ,  NUCTECH JIANGSU COMPANY LIMITED

Inventor： Ziran Zhao ,  Zhiqiang Chen ,  Wanlong Wu ,  Li Zhang ,  Yingkang Jin ,  Ming Ruan

IPC: G01V5/00

Abstract: A safety inspection apparatus is disclosed in embodiments of the present invention. The safety inspection apparatus includes: an x-ray source including a ray emission focal spot; and a plurality of detector modules each of which has a ray receiving surface, and which are arranged along a plurality of straight line segments. The plurality of straight line segments include a first straight line segment and two second straight line segments, and, the two second straight line segments extend from the two ends of the first straight line segment towards the x-ray source side, respectively. In a plane where the sectorial ray beam is located, a normal to the ray receiving surface of each of the detector modules at a midpoint of the ray receiving surface of the each of the detector modules passes generally through the ray emission focal spot of the x-ray source.

公开(公告)号：US20190234904A1

公开(公告)日：2019-08-01

申请号：US16376983

申请日：2019-04-05

Applicant: Nuctech Company Limited

Inventor： Qingjun Zhang ,  Yuanjing Li ,  Zhiqiang Chen ,  Ziran Zhao ,  Yinong Liu ,  Yaohong Liu ,  Huishao He ,  Qiufeng Ma ,  Weiping Zhu ,  Xiang Zou ,  Jianping Chang ,  Song Liang

IPC: G01N27/62 ,  H01J49/04 ,  G01N1/22 ,  G01N1/02 ,  G01N1/40

Abstract: A detection apparatus and a detection method are disclosed. In one aspect, the detection apparatus includes a sampling device for collecting samples to be checked. It further includes a sample pre-processing device configured to pre-process the sample from the sampling device. It further includes a sample analyzing device for separating samples from the pre-processing device and for analyzing the separated samples. The detection apparatus is miniaturized and highly precise, and is capable of quickly and accurately detecting gaseous phase or particulate substances, and it has applications for safety inspections at airports, ports, and subway stations.