公开(公告)号：US10794923B2

公开(公告)日：2020-10-06

申请号：US15868878

申请日：2018-01-11

Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

Inventor： Qingjun Zhang ,  Yuanjing Li ,  Ziran Zhao ,  Qiufeng Ma ,  Ge Li ,  Biao Cao ,  Qi Mao

IPC: G01N35/04 ,  G01N1/02 ,  G01N35/00 ,  G01N1/00 ,  G01N27/62 ,  G01N1/22 ,  H01J49/04 ,  H01J49/00 ,  G01N33/15 ,  G01N1/24 ,  G01N33/22

Abstract: The present invention discloses a wiping-type sample sampling and feeding device, a card reading apparatus, and a gate machine apparatus. The wiping-type sample sampling and feeding device comprises a thermally desorbing portion for analyzing a substance; a wiping-type sampling portion for wiping the substance on a card or certificate and includes a first wheel, a second wheel and a wiping conveyor belt that travels between the first and second wheels along a first direction; and a card/certificate conveyor portion including a card carrying belt configured to convey a card or certificate along a second direction so that the card or certificate can contact with the wiping conveyor belt during conveyance of the card or certificate, thereby the wiping conveyor belt wipes a surface of the card or certificate, wherein the second direction is substantially perpendicular to the first direction.

公开(公告)号：US10782211B2

公开(公告)日：2020-09-22

申请号：US15858829

申请日：2017-12-29

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Qingjun Zhang ,  Yuanjing Li ,  Ziran Zhao ,  Ge Li ,  Biao Cao ,  Qiufeng Ma ,  Linxia Tan

IPC: G01N1/22 ,  G01N1/02 ,  G01N1/44 ,  G01N33/00

Abstract: A sampling device and an inspection apparatus are disclosed. In one aspect, an example gathering and sampling device includes a cylindrical outer housing and an inner housing disposed within the cylindrical outer housing, a cyclone chamber is formed between the cylindrical outer housing and the inner housing to generate a cyclone by injecting a gas flow into the cyclone chamber. The gathering and sampling device further includes an outer chamber body, and a plurality of gas injection orifices formed in the first inner housing end opening of the inner housing and configured to inject a gas towards a substantial center of a circular region defined by an end face of the first outer housing end opening of the cylindrical outer housing.

公开(公告)号：US10699887B2

公开(公告)日：2020-06-30

申请号：US15786389

申请日：2017-10-17

Applicant: NUCTECH COMPANY LIMITED

Inventor： Qingjun Zhang ,  Yuanjing Li ,  Ziran Zhao ,  Weiping Zhu ,  Nan Bai ,  Qiufeng Ma

IPC: H01J49/00 ,  G01N33/00 ,  G01N15/10 ,  G01N35/10 ,  G01N1/38 ,  G01N1/28 ,  G01N33/558 ,  G01N30/06 ,  G01N30/12 ,  G01N30/16 ,  B01L3/00 ,  G01N1/10 ,  G01N1/40 ,  H01J49/04 ,  G01N30/00 ,  G01N30/18 ,  G01N30/04 ,  G01N1/00

Abstract: Embodiments of the present disclosure relate to a preparation and feed apparatus of a standard sample for calibration of a trace-analysis instrument, and especially to a preparation and feed apparatus of a standard sample for calibration of a gas chromatograph-ion mobility spectrometer. When the trace-analysis instrument is being calibrated by taking advantage of the preparation and feed apparatus according to embodiments of the disclosure, it is unnecessary to use an additional dedicated tool and steps to prepare the sample for testing and to use an organic solvent or a dedicated sample application/dispensing tool, resulting in that the trace-analysis instrument is simple and convenient to carry and use, and the substance for calibration is also convenient to store and exchange; moreover, the trace-analysis instrument is also safe, reliable and environmentally friendly.

公开(公告)号：US20190234905A1

公开(公告)日：2019-08-01

申请号：US16376986

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

CPC classification number: G01N27/622 ,  G01N1/02 ,  G01N1/2211 ,  G01N1/405 ,  G01N1/42 ,  G01N30/60 ,  G01N30/722 ,  G01N2001/028 ,  H01J49/0422 ,  H01J49/0459 ,  H01J49/0468 ,  G01N30/6043 ,  G01N30/6078

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.

公开(公告)号：US10281431B2

公开(公告)日：2019-05-07

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: G01N1/02 ,  G01N27/62 ,  G01N1/22 ,  G01N30/72

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：US10215666B2

公开(公告)日：2019-02-26

申请号：US15117086

申请日：2015-12-28

Applicant: Nuctech Company Limited

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

IPC: G01N1/02 ,  G01N30/08 ,  G01N1/22 ,  G01N1/40 ,  G01N27/62 ,  H01J49/04 ,  G01N1/42 ,  G01N1/38 ,  G01N30/12

Abstract: A sample injection device for sample collection and thermal desorption includes: a sample collection structure; a piston type adsorber having an adsorption cavity communicating with the sample collection structure; a piston cylinder defining a piston chamber accommodating the adsorber and communicating with the adsorption cavity; a thermal desorption chamber communicating with the adsorption cavity and the piston chamber; and a pump configured to pump a sample diffused in an ambient gas into the adsorption cavity through the sample collection structure and the piston chamber; the adsorber is movable between a sample collecting position where the adsorption cavity is outside the thermal desorption chamber and adsorbs the sample collected by the sample collection structure and a sample desorbing position where the adsorption cavity is inside the thermal desorption chamber so that the adsorbed sample is thermally desorbed in the thermal desorption chamber.

公开(公告)号：US09618484B2

公开(公告)日：2017-04-11

申请号：US14577603

申请日：2014-12-19

Applicant: NUCTECH COMPANY LIMITED

Inventor： Qingjun Zhang ,  Yuanjing Li ,  Zhiqiang Chen ,  Qiufeng Ma ,  Ziran Zhao ,  Yinong Liu ,  Yaohong Liu ,  Junxiao Wang ,  Xiang Zou ,  Yanchun Wang ,  Jianping Chang ,  Linxia Tan

IPC: G01N30/18 ,  G01N30/12 ,  G01N30/72 ,  G01N27/62 ,  G01N30/20 ,  G01N30/30 ,  G01N30/02

CPC classification number: G01N30/18 ,  G01N27/622 ,  G01N30/12 ,  G01N30/20 ,  G01N30/30 ,  G01N30/7206 ,  G01N2030/025

Abstract: The present invention discloses a general sample injector, comprising a sample injection port mechanism, a sample injector shell, a vaporizing chamber, a heater, a temperature control unit, a carrier gas channel, a septum purge channel, a flow splitting channel, a coolant channel, a multichannel flow control valve and a temperature control unit. The general sample injector, equivalent to a “programmed temperature vaporizer” injector combining splitting/no splitting with cold column head sample injection, gives full play to the advantages of various sample injection modes, overcomes a plurality of disadvantages, and has higher practicability and better flexibility.

公开(公告)号：US11422070B2

公开(公告)日：2022-08-23

申请号：US16989123

申请日：2020-08-10

Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

Inventor： Qingjun Zhang ,  Yuanjing Li ,  Zhiqiang Chen ,  Jianmin Li ,  Shangmin Sun ,  Yaohong Liu ,  Weiping Zhu ,  Qiufeng Ma ,  Ge Li ,  Biao Cao ,  Zheng Liang ,  Ying Li ,  Yu Hu

IPC: G01N1/24 ,  G01N27/622

Abstract: A sampling probe, an automatic sampling device, and a container detection system are provided. The sampling probe includes: a mounting base; a housing mounted on the mounting base, a first accommodation chamber having an opening being defined in the housing, and an exhaust hole in communication with the first accommodation chamber and outside of the housing being formed in the housing; a coupling portion formed on an outer edge of the opening of the first accommodation chamber and formed to be hermetically coupled with an air outlet of a container; and a suction device mounted on the housing and configured to suck gas in the container into the first accommodation chamber through the air outlet. The sampling probe may collect the odor of toxic and harmful gases/hazardous chemicals inside the container at the air outlet of the container, without destroying the overall structure of the container.

公开(公告)号：US11408852B2

公开(公告)日：2022-08-09

申请号：US16621877

申请日：2019-05-08

Applicant: TSINGHUA UNIVERSITY ,  Nuctech Company Limited ,  WUHU JIAHONG NEW MATERIAL CO., LTD.

Inventor： Zhiqiang Chen ,  Chunan Xu ,  Qingjun Zhang ,  Fengfeng Xiong ,  Yuanjing Li ,  Ziran Zhao ,  Yinong Liu ,  Yaohong Liu ,  Ge Li ,  Qiufeng Ma ,  Biao Cao

IPC: G01N1/22 ,  G01N27/622 ,  G01N30/72 ,  G01N30/02

Abstract: A sampling tube bundle includes a tube bundle body and a joint assembly. The tube bundle body includes a gas sampling tube for transmitting sampling gas; a metal woven layer wrapping an outer circumference of the gas sampling tube; a heating pad comprising a heat tracing cable wrapping an outer circumference of the metal woven layer, for heating the sampling gas in the gas sampling tube; a flame resistant tape wound around an outer circumference of the of the heating pad; a plurality of signal transmission lines circumferentially spaced apart from one another are arranged outside the flame resistant tape; and a sheath located outside the signal transmission line. The joint assembly is arranged on an end of the tube bundle body, for connecting to an analysis device or a sampling device.

公开(公告)号：US10989689B2

公开(公告)日：2021-04-27

申请号：US16235315

申请日：2018-12-28

Applicant: Nuctech Company Limited ,  TSINGHUA UNIVERSITY

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

IPC: G01N27/62 ,  G01N27/622 ,  G01N30/72 ,  G01N30/20 ,  G01N30/60 ,  G01N30/02

Abstract: A gas chromatography-ion mobility spectrometry detector and a hyphenated apparatus, the gas chromatography-ion mobility spectrometry detector comprises a gas chromatography mechanism and an ion mobility spectrometry mechanism. The gas chromatography mechanism comprises a chromatographic column and a sample injection port. The ion mobility spectrometry mechanism comprises a mobility tube and a connecting body, while a metal connection plate of the connecting body comprises a chromatographic metal plate, an ion mobility metal plate and a semipermeable membrane; on the ion mobility metal plate there are provided an ion mobility sample and carrier gas inlet, an ion mobility sample chamber and a sample injection port; the chromatography sample chamber and the ion mobility sample chamber are separated by semipermeable membrane.