公开(公告)号：US11994492B2

公开(公告)日：2024-05-28

申请号：US17806805

申请日：2022-06-14

Applicant: Nuctech Company Limited

Inventor： Yan Wang ,  Qingjun Zhang ,  Yuanjing Li ,  Zhiqiang Chen ,  Jianmin Li ,  Yaohong Liu ,  Ge Li ,  Zhongyuan Hao ,  Nei Yang ,  Guangqin Li

IPC: H01J49/42 ,  G01N27/623 ,  H01J49/00 ,  H01J49/06

CPC classification number: G01N27/623 ,  H01J49/0031 ,  H01J49/061 ,  H01J49/424 ,  H01J49/4265

Abstract: The present disclosure provides a gas analysis device and a method for detecting sample gas. The gas analysis device includes: an ion mobility spectrometer including an ion mobility tube, an ion gate, a plurality of electrodes, a suppression grid, and a Faraday plate sequentially disposed in the ion mobility tube, wherein the Faraday plate is configured to receive sample ions discharged from the suppression grid, and the Faraday plate is provided with a through hole; a mass spectrometer; a gate valve disposed between the Faraday plate and an ion inlet of the mass spectrometer; and a controller configured to control an opening or closing of the gate valve to allow the sample ions discharged from the suppression grid to flow into the mass spectrometer through the through hole of the Faraday plate when the gate valve is opened.

公开(公告)号：US20220404312A1

公开(公告)日：2022-12-22

申请号：US17806805

申请日：2022-06-14

Applicant: Nuctech Company Limited

Inventor： Yan Wang ,  Qingjun Zhang ,  Yuanjing Li ,  Zhiqiang CHEN ,  Jianmin Li ,  Yaohong Liu ,  Ge Li ,  Zhongyuan Hao ,  Nei Yang ,  Guangqin Li

IPC: G01N27/623 ,  H01J49/42 ,  H01J49/00 ,  H01J49/06

Abstract: The present disclosure provides a gas analysis device and a method for detecting sample gas. The gas analysis device includes: an ion mobility spectrometer including an ion mobility tube, an ion gate, a plurality of electrodes, a suppression grid, and a Faraday plate sequentially disposed in the ion mobility tube, wherein the Faraday plate is configured to receive sample ions discharged from the suppression grid, and the Faraday plate is provided with a through hole; a mass spectrometer; a gate valve disposed between the Faraday plate and an ion inlet of the mass spectrometer; and a controller configured to control an opening or closing of the gate valve to allow the sample ions discharged from the suppression grid to flow into the mass spectrometer through the through hole of the Faraday plate when the gate valve is opened.

公开(公告)号：US11183354B2

公开(公告)日：2021-11-23

申请号：US16231667

申请日：2018-12-24

Applicant: Nuctech Company Limited

Inventor： Yaohong Liu ,  Liang Zhang ,  Xiaotong Zhang

IPC: H01H5/00 ,  H01J33/02 ,  H05H5/03 ,  H05H7/22

Abstract: The present disclosure provides a drawer-type carrying device for an accelerator and an cabin structure for the accelerator, the drawer-type carrying device for the accelerator includes a frame mechanism and a drawing mechanism. The frame mechanism is used for installing the accelerator; the drawing mechanism is connected with the frame mechanism and the frame mechanism is movable relative to the drawing mechanism. The cabin structure for the accelerator includes a cabin, a shielding mechanism and a drawer-type carrying device for the accelerator. The cabin has a working area and a maintenance area. The shielding mechanism is disposed in the working area and has a side opening door facing towards the maintenance area. The frame mechanism is capable of drawn from the shielding mechanism into the maintenance area when the side opening door is opened.

公开(公告)号：US11054542B2

公开(公告)日：2021-07-06

申请号：US16946953

申请日：2020-07-13

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Kejun Kang ,  Huaibi Chen ,  Yaohong Liu ,  Chuanxiang Tang ,  Yuanjing Li ,  Hao Zha ,  Liang Zhang

IPC: G01V5/00

Abstract: Embodiments of the disclosure provide a multi-ray-source accelerator and an inspection method. The multi-ray-source accelerator includes: a plurality of acceleration tubes, each acceleration tube of the plurality of acceleration tubes including an acceleration tube body that defines at least one cavity, the plurality of acceleration tubes being arranged in at least one row along a straight line or an arc and connected in series with each other; and a microwave unit configured to provide a microwave field to the plurality of acceleration tubes. The plurality of acceleration tubes are arranged to allow the microwave unit to provide the microwave field from an acceleration tube at one end of the plurality of acceleration tubes so as to accelerate electron beams in cavities of all the acceleration tubes.

公开(公告)号：US10825643B2

公开(公告)日：2020-11-03

申请号：US16231672

申请日：2018-12-24

Applicant: Nuctech Company Limited

Inventor： Yaohong Liu ,  Liang Zhang ,  Xiaotong Zhang ,  Feng Gao

IPC: H01J37/09 ,  H01J37/32 ,  H01J37/065 ,  G01N33/20 ,  G01N33/24

Abstract: The present application discloses an accelerator system for mineral component analysis and system and method for mineral component analysis. The accelerator system includes an electron gun for generating an electron beam; an accelerating tube for accelerating an electron beam emitted by the electron gun to a predetermined energy; a composite target for generating a radioactive ray on the composite target after receiving bombardment of the electron beam; and a shielding mechanism for shielding the radioactive ray.

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：US10274636B2

公开(公告)日：2019-04-30

申请号：US14582076

申请日：2014-12-23

Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Huaping Tang ,  Zhiqiang Chen ,  Chuanxiang Tang ,  Huaibi Chen ,  Yuanjing Li ,  Ziran Zhao ,  Yaohong Liu ,  Shangmin Sun ,  Xinshui Yan ,  Zhanfeng Qin

IPC: G01V5/00 ,  G03C9/00 ,  G01N23/04

Abstract: The present invention may perform fluoroscopic imaging simultaneously on the subjects in at least two channels using only one electron accelerator, at least two sets of X-ray beams and at least two sets of detector systems, through the design of the electron accelerator, the shielding and collimating device, the at least two detector arrays and various mechanical composite structures. The X-ray fluoroscopic imaging system according to the present invention may be designed in specific forms of a stationary type, an assembled type, a track mobile type or vehicular mobile type, etc., and has advantages such as simple structure, low cost, strong function, good image quality and the like.

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：US09991085B2

公开(公告)日：2018-06-05

申请号：US15696919

申请日：2017-09-06

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Yuanjing Li ,  Yaohong Liu ,  Jinsheng Liu ,  Huaping Tang ,  Chuanxiang Tang ,  Huaibi Chen ,  Xinshui Yan

IPC: H01J35/14 ,  H01J35/16 ,  H01J35/30

CPC classification number: H01J35/14 ,  H01J35/16 ,  H01J35/30 ,  H01J2235/16

Abstract: An apparatus and method to generate distributed x-rays. A hot cathode of an electron gun is used in vacuum to generate electron beams having certain initial movement energy and speed. Periodic scanning is performed with the initial low-energy electron beams, which are thus caused to be reciprocally deflected. A current-limiting device is provided in the travel path of the electron beams along the direction of the reciprocal deflection. Through holes arranged in an array on the current-limiting device, only part of the electron beams targeting specific positions can pass to form sequential electron beam currents distributed in an array. These electron beam currents are accelerated by a high-voltage electric field to obtain high energy, bombard an anode target, and thus sequentially generate corresponding focus spots and x-rays distributed in an array at the anode target.

公开(公告)号：US09780426B2

公开(公告)日：2017-10-03

申请号：US15281026

申请日：2016-09-29

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Kejun Kang ,  Jiaru Shi ,  Ping Wang ,  Chuanxiang Tang ,  Huaibi Chen ,  Yaohong Liu ,  Xinshui Yan ,  Wenhui Huang

IPC: H01P1/18 ,  H05H7/00 ,  H01P5/02 ,  H05H5/03 ,  H05H5/06

CPC classification number: H01P1/182 ,  H01P1/067 ,  H01P5/02 ,  H01P5/082 ,  H05H5/03 ,  H05H5/06

Abstract: The present disclosure relates to a phase shifter, an accelerator, and an operating method therefor. The phase shifter comprises a rotating part having a first hollow structure, the first hollow structure having a first cavity, a distance between a circumference of the cross section of the first cavity and a rotation center of the rotating part changing periodically and continuously in a peripheral direction, such that when the rotatory part rotates, a phase shift occurs between two adjacent microwave pulses at an outlet of the phase shifter. The operating method comprises transmitting a microwave pulse within the accelerator at a repetitive frequency v Hertz; the driving devices drives the rotating part to rotate at a rotation speed of n RPM, wherein n=15v*m, m is an odd number, 1, 3, 5 . . . , such that when transmitting a microwave pulse each time, the long axis of the oval cross section of the first cavity of the rotatory part is rotated to a horizontal or vertical state.