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：US10386502B2

公开(公告)日：2019-08-20

申请号：US15853961

申请日：2017-12-26

Applicant: NUCTECH COMPANY LIMITED

Inventor： Shuwei Li ,  Qingjun Zhang ,  Ziran Zhao ,  Junxiao Wang ,  Xiang Zou ,  Bozhen Zhao ,  Lifeng Sun ,  Yongqiang Wang

IPC: G01T1/20 ,  G01V5/00

Abstract: The present application relates to a dual energy detector and a radiation inspection system. The dual energy detector comprises: a detector module mount and a plurality of detector modules. The detector module includes a higher energy detector array and a lower energy detector array, which are juxtaposedly provided on said detector module mount to be independently irradiated. The present application may simplify the arrangement of the photodiodes and printed circuit boards to which the higher and lower energy detector arrays are connected, such that necessary thickness dimension of the detector module mount is reduced, thereby facilitating the installation and use of the dual energy detector of the present application. On the other hand, the radiation beam in the present application may be independently irradiated to the higher and lower energy detector arrays juxtaposed to each other, which reduces to certain extent the mutual restriction during selection of the higher and lower energy detector arrays.

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：US09915751B2

公开(公告)日：2018-03-13

申请号：US14769308

申请日：2014-07-22

Applicant: Nuctech Company Limited ,  TSINGHUA UNIVERSITY

Inventor： Kejun Kang ,  Jianmin Li ,  Yuanjing Li ,  Yulan Li ,  Jingyu Gu ,  Weizhen Wang ,  Quanwei Song ,  Qingjun Zhang ,  Shenjin Ming ,  Xuewu Wang ,  Hui Gong ,  Tao Xue

IPC: G01V5/00

CPC classification number: G01V5/0016 ,  G01V5/0075

Abstract: The present application discloses a detector module, which is arranged on a detector arm, comprising one or a plurality of detector units arranged in a scattered configuration, wherein each of the detector units in the detector module is installed aiming at a beam center of a ray source, thus improving imaging quality and reducing the size of a detector frame drastically.

公开(公告)号：US09771515B2

公开(公告)日：2017-09-26

申请号：US14827248

申请日：2015-08-14

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Yanchun Wang ,  Qingjun Zhang ,  Yuanjing Li ,  Zhiqiang Chen ,  Ziran Zhao ,  Yinong Liu ,  Yaohong Liu ,  Jianping Chang ,  Shuqing Zhao ,  Wenjian Zhang ,  Yongqiang Wang

IPC: C09K11/77 ,  C04B35/63 ,  C04B35/645 ,  G01T1/29

CPC classification number: C09K11/7771 ,  C04B35/547 ,  C04B35/62615 ,  C04B35/6303 ,  C04B35/645 ,  C04B35/6455 ,  C04B2235/3224 ,  C04B2235/445 ,  C04B2235/5436 ,  C04B2235/5463 ,  C04B2235/604 ,  C04B2235/656 ,  C04B2235/6565 ,  C04B2235/662 ,  G01T1/2935

Abstract: The present disclosure is directed to a low cost sintering process for the preparation of gadolinium oxysulfide having a general formula of Gd2O2S, referred to as GOS, scintillation ceramics, comprising uniaxial hot pressing primary sintering and hot isostatic pressing secondary sintering.

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：US09464997B2

公开(公告)日：2016-10-11

申请号：US14129669

申请日：2012-12-28

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Shuwei Li ,  Zhiqiang Chen ,  Yuanjing Li ,  Ziran Zhao ,  Yinong Liu ,  Qingjun Zhang ,  Weibin Zhu ,  Yi Wang ,  Shuqing Zhao ,  Wenjian Zhang

IPC: G01N23/087 ,  G01T1/22

CPC classification number: G01N23/087 ,  G01N2223/402 ,  G01N2223/507 ,  G01T1/22

Abstract: Methods and apparatuses for measuring an effective atomic number of an object are disclosed. The apparatus includes: a ray source configured to product a first X-ray beam having a first energy and a second X-ray beam having a second energy; a Cherenkov detector configured to receive the first X-ray beam and the second X-ray beam that pass through an object under detection, and to generate a first detection value and a second detection value; and a data processing device configured to obtain an effective atomic number of the object based on the first detection value and the second detection value. The Cherenkov detector can eliminate disturbance of X-rays below certain energy threshold with respect to the object identification, and thus accuracy can be improved for object identification.

Abstract translation: 公开了用于测量物体的有效原子序数的方法和装置。 该装置包括：射线源，被配置为产生具有第一能量的第一X射线束和具有第二能量的第二X射线束; 切伦科夫检测器，被配置为接收通过检测对象的第一X射线束和第二X射线束，并产生第一检测值和第二检测值; 以及数据处理装置，被配置为基于所述第一检测值和所述第二检测值来获得所述对象的有效原子序数。 切恩科夫检测器可以消除相对于物体识别的某些能量阈值以下的X射线干扰，从而可以提高对象识别的精度。

公开(公告)号：US09285342B2

公开(公告)日：2016-03-15

申请号：US14525058

申请日：2014-10-27

Applicant: Nuctech Company Limited

Inventor： Qingjun Zhang ,  Shiping Cao ,  Yuanjing Li ,  Zhiqiang Chen ,  Ziran Zhao ,  Yinong Liu ,  Jianping Chang ,  Yan Zheng ,  Yanchun Wang ,  Shaoji Mao

IPC: G01N30/72 ,  H01J49/04 ,  G01N27/62

CPC classification number: G01N27/622 ,  G01N30/7206 ,  H01J49/0422 ,  H01J49/0468

Abstract: An ion mobility spectrometer system is disclosed. In one aspect, the system includes a gas chromatograph, first and second ion mobility spectrometers, and a sample feed device that feeds a sample from the gas chromatograph to the first and second ion mobility spectrometers. The sample feed device includes an inner chamber, first and second sample outlets for outputting the sample from the gas chromatograph to the first and second ion mobility spectrometers, respectively, and a gas inlet for inputting a gas into the sample feed device. The system detects and identifies molecules at improved resolution and enhanced molecule information. The system detects positive and negative ions, interrelates positive-mode and negative-mode spectrums, and separates substances.

Abstract translation: 公开了一种离子迁移谱仪系统。 在一个方面，该系统包括气相色谱仪，第一和第二离子迁移谱仪，以及将样品从气相色谱仪供给到第一和第二离子迁移谱仪的样品进料装置。 样品进料装置包括内室，用于将样品从气相色谱仪分别输出到第一和第二离子迁移谱仪的第一和第二样品出口，以及用于将气体输入到样品进料装置中的气体入口。 该系统以改进的分辨率和增强的分子信息检测和识别分子。 系统检测正离子和负离子，相互作用正模式和负模式光谱，并分离物质。