公开(公告)号：US10276359B2

公开(公告)日：2019-04-30

申请号：US15832193

申请日：2017-12-05

Applicant: Nuctech Company Limited

Inventor： Qingjun Zhang ,  Yuanjing Li ,  Zhiqiang Chen ,  Yanchun Wang ,  Ziran Zhao ,  Xianghua Li ,  Qiufeng Ma ,  Ge Li ,  Biao Cao ,  Qi Mao ,  Xiang Zou

IPC: G01N27/62 ,  H01J49/16 ,  H01J49/00 ,  H01J49/02

Abstract: The present disclosure provides an ion mobility spectrometer, which comprises: a power supply circuit, configured to provide a power supply voltage; a corona discharge configured to generate ions to be subjected to measurement, through corona discharge; an ion migration circuit configured to control migration of the ions; a migration zone structure configured to realize, under control of the ion migration circuit, mobility spectrum measurement of the ions which pass through the migration zone structure; a redundant charge extraction electrode arranged between the corona discharge structure and the migration zone structure, so that the ions which are generated by the corona discharge structure can pass therethrough to reach the migration zone structure; and a redundant charge extraction circuit, wherein the redundant charge extraction electrode is connected to the ground through the redundant charge extraction circuit.

公开(公告)号：US11476102B2

公开(公告)日：2022-10-18

申请号：US16947998

申请日：2020-08-27

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Qingjun Zhang ,  Zhiqiang Chen ,  Yuanjing Li ,  Jianmin Li ,  Yinong Liu ,  Yaohong Liu ,  Guangqin Li ,  Weiping Zhu ,  Ge Li ,  Qiufeng Ma ,  Biao Cao

IPC: H01J49/00 ,  G01N27/622 ,  H01J49/04

Abstract: Embodiments of the present disclosure provide a real-time calibration device, a real-time calibration method and a detection apparatus. The real-time calibration device is in fluid communication with a sample injection pipeline of the apparatus to be calibrated. The real-time calibration device is configured to release a trace amount of calibration agent molecules during a sample injection of the apparatus to be calibrated, so that the trace amount of calibration agent molecules and a sample entering the apparatus to be calibrated are mixed and together enter the apparatus to be calibrated, and information of the sample and the calibration agent is detected by the apparatus to be calibrated, thereby performing a calibration.

公开(公告)号：US11346807B2

公开(公告)日：2022-05-31

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: H01J49/00 ,  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.

公开(公告)号：US11320407B2

公开(公告)日：2022-05-03

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：US10520402B2

公开(公告)日：2019-12-31

申请号：US16232062

申请日：2018-12-26

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

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

IPC: G01N1/24 ,  G01N1/22 ,  G01N1/40 ,  G01N30/30

Abstract: The present disclosure relates to the technical field of safety detection, and in particular to a sample collecting and introducing device and a detection system. The sample collecting and introducing device provided by the present disclosure includes a sampling device for collecting a sample, and a semipermeable membrane device for extracting the sample collected by the sampling device and conveying the extracted sample to detection equipment, wherein the sampling device is provided with an air guide cavity, the air guide cavity is configured to guide airflow carrying the sample to flow to the semipermeable membrane device, the semipermeable membrane device is provided with a semipermeable membrane which is arranged outside the sampling device. In the present disclosure, the size of the semipermeable membrane is no longer limited by the sampling device, and therefore the difficulty of increasing the area of the semipermeable membrane is reduced.

公开(公告)号：US10234436B2

公开(公告)日：2019-03-19

申请号：US15827703

申请日：2017-11-30

Applicant: Nuctech Company Limited

Inventor： Qingjun Zhang ,  Yuanjing Li ,  Ziran Zhao ,  Weiping Zhu ,  Huishao He ,  Qiufeng Ma ,  Xiang Zou ,  Biao Cao

IPC: G01N30/64 ,  G01N27/62 ,  H01J49/06 ,  G01N30/02

Abstract: The present disclosure provides a gas chromatography-ion mobility spectrometry apparatus, including a housing, an injection port mounted to and connected with the housing and configured for input of a gas containing a sample therein, a multicapillary column configured for separation of a gas substance and an ion mobility tub configured for analysis of the gas substance. The gas chromatography-ion mobility spectrometry apparatus further includes: a gas path part connected with the ion mobility tube and configured for providing the gas to the ion mobility tube and receiving a gas discharged from the ion mobility tube; and a buffer base part detachably mounted to the housing and configured to isolation vibration outside the buffer base part, the ion mobility tube being disposed on the buffer base part, wherein the gas path part is mounted in an interior space of the buffer base part.

公开(公告)号：US20180182606A1

公开(公告)日：2018-06-28

申请号：US15832193

申请日：2017-12-05

Applicant: Nuctech Company Limited

Inventor： Qingjun Zhang ,  Yuanjing Li ,  Zhiqiang Chen ,  Yanchun Wang ,  Ziran Zhao ,  Xianghua Li ,  Qiufeng Ma ,  Ge Li ,  Biao Cao ,  Qi Mao ,  Xiang Zou

IPC: H01J49/16 ,  H01J49/02 ,  H01J49/00 ,  G01N27/62

CPC classification number: H01J49/168 ,  G01N27/622 ,  H01J49/0013 ,  H01J49/022

Abstract: The present disclosure provides an ion mobility spectrometer, which comprises: a power supply circuit, configured to provide a power supply voltage; a corona discharge configured to generate ions to be subjected to measurement, through corona discharge; an ion migration circuit configured to control migration of the ions; a migration zone structure configured to realize, under control of the ion migration circuit, mobility spectrum measurement of the ions which pass through the migration zone structure; a redundant charge extraction electrode arranged between the corona discharge structure and the migration zone structure, so that the ions which are generated by the corona discharge structure can pass therethrough to reach the migration zone structure; and a redundant charge extraction circuit, wherein the redundant charge extraction electrode is connected to the ground through the redundant charge extraction circuit.