公开(公告)号：US20230236150A1

公开(公告)日：2023-07-27

申请号：US17999201

申请日：2021-05-14

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Qingjun ZHANG ,  Yuanjing LI ,  Zhiqiang CHEN ,  Jianmin LI ,  Weiping ZHU ,  Qiufeng MA ,  Biao CAO ,  Lili YAN ,  Ge LI ,  Nei YANG

IPC: G01N27/622 ,  G01N30/20

CPC classification number: G01N27/622 ,  G01N30/20 ,  G01N2030/025 ,  G01N2030/201

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.

公开(公告)号：US20210215582A1

公开(公告)日：2021-07-15

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 ,  G01N1/44 ,  G01N27/622 ,  G01N1/22

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：US20230236093A1

公开(公告)日：2023-07-27

申请号：US18001249

申请日：2021-06-07

Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Qingjun ZHANG ,  Yuanjing LI ,  Zhiqiang CHEN ,  Jianmin LI ,  Weiping ZHU ,  Ge LI ,  Nei YANG ,  Biao CAO ,  Wei WANG ,  Xiulin NI ,  Shengxi LIU ,  Zheng LIANG

IPC: G01N1/22 ,  G01N1/24 ,  G01N30/20 ,  B25J9/16

CPC classification number: G01N1/2211 ,  G01N1/24 ,  G01N30/20 ,  B25J9/1697 ,  G01N2030/201 ,  G01N30/7206

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.

公开(公告)号：US20210141103A1

公开(公告)日：2021-05-13

申请号：US16624753

申请日：2018-05-29

Applicant: Nuctech Company Limited ,  TSINGHUA UNIVERSITY

Inventor： Qingjun ZHANG ,  Yuanjing LI ,  Ziran ZHAO ,  Lifeng SUN

IPC: G01T1/20

Abstract: A backscatter detection module includes: a plate-like light-transmitting carrier, two layers of scintillators and a light sensor. The light-transmitting carrier is made of a material that allows fluorescence photons to pass through, and has two light-transmitting planes opposite to each other and at least one light emergent end surface; the light emergent end surface is located between the two light-transmitting planes; the two layers of scintillators are respectively fixedly attached to the two light-transmitting planes; the light sensor is coupled to the light emergent end surface.

公开(公告)号：US20200240961A1

公开(公告)日：2020-07-30

申请号：US16714799

申请日：2019-12-16

Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Qingjun ZHANG ,  Yuanjing LI ,  Zhiqiang CHEN ,  Weiping ZHU ,  Yaohong LIU ,  Qiufeng MA ,  Ge LI ,  Biao CAO ,  Lili YAN

IPC: G01N30/44 ,  G01N30/72

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.

公开(公告)号：US20190193017A1

公开(公告)日：2019-06-27

申请号：US16232050

申请日：2018-12-26

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 ,  Nan BAI

IPC: B01D53/04 ,  B01D53/02 ,  G01N27/62 ,  G01N30/26

CPC classification number: B01D53/0446 ,  B01D53/025 ,  B01D53/0438 ,  B01D2257/80 ,  B01D2259/40003 ,  B01D2259/40086 ,  B01D2259/40096 ,  G01N27/622 ,  G01N30/26 ,  G01N2030/025

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. In the gas purification apparatus, the filtered air is used as the regeneration gas to prevent secondary pollution in a recycling process of the purificant; furthermore, by means of the state switching function of the switching component, the mutual interference between the two working states of purification and regeneration can be prevented, and all the above advantages can improve the reliability of the recycling of the purificant, thereby optimizing the performance and the service life of the gas purification apparatus.

公开(公告)号：US20180188388A1

公开(公告)日：2018-07-05

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：US20180164194A1

公开(公告)日：2018-06-14

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 ,  G01N33/00

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：US20170138902A1

公开(公告)日：2017-05-18

申请号：US15271713

申请日：2016-09-21

Applicant: Nuctech Company Limited

Inventor： Qingjun ZHANG ,  Yuanjing LI ,  Zhiqiang CHEN ,  Weiping ZHU ,  Ziran ZHAO ,  Qiufeng MA ,  Huishao HE ,  Jianping CHANG ,  Xiang ZOU ,  Linxia TAN

IPC: G01N27/62 ,  G01N1/22 ,  G01N30/72

CPC classification number: G01N27/622 ,  G01N1/02 ,  G01N1/22 ,  G01N30/72 ,  G01N30/7206 ,  G01N2001/022 ,  G01N2001/024

Abstract: The present invention discloses darkroom type security inspection apparatus and method. An apparatus comprises a housing constituting a closed darkroom, and assemblies disposed inside the housing. The assemblies disposed inside the housing are communicated by fittings or connectors and comprises: a sampling assembly comprising a sample collecting unit and a conveyer unit configured to convey an object to be inspected into the sample collecting unit; a sample processing assembly configured to concentrate and analyze the sample; and, an inspecting assembly configured to inspect composition of the sample by means of a gas chromatographic-ion mobility spectrometer (GC-IMS) or a separated ion mobility spectrometer (IMS). The security inspection apparatus of the present invention can perform the sampling easy, rapidly and effectively and perform the inspection accurately and rapidly without destroying and unpacking an object to be inspected, and thus is suitable for requirements of on-site rapid inspection of forbidden items in the airport, customs and the likes.

公开(公告)号：US20210404988A1

公开(公告)日：2021-12-30

申请号：US16626767

申请日：2019-06-12

Applicant: NUCTECH COMPANY LIMITED

Inventor： 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

IPC: G01N27/622 ,  G01N1/22

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.