公开(公告)号：US10535509B2

公开(公告)日：2020-01-14

申请号：US15858255

申请日：2017-12-29

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Qingjun Zhang ,  Yuanjing Li ,  Ziran Zhao ,  Weiping Zhu ,  Huishao He ,  Xianghua Li ,  Qiufeng Ma

IPC: G01N27/62 ,  H01J49/06 ,  H01J49/42

Abstract: The present disclosure provides an ion migration tube and a method of operation the same. The ion migration tube includes an interior space and an ion gate disposed within the interior space, the interior space includes an ionization region having an absolute value of potential V1 and a migration region. An ion gate is disposed between the ionization region and the migration region and includes a first ion gate grid having an absolute value of potential V2 and a second ion gate grid having an absolute value of potential V3, the migration region comprises at least a first migration region electrode having an absolute value of potential V4 and a second migration region electrode having an absolute value of potential V5. When the ion gate is opened, a potential well is formed for ionized ions between the first ion gate grid and the first migration region electrode so as to compress an ion group entering the migration region.

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：US10429348B2

公开(公告)日：2019-10-01

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: H01J49/00 ,  G01N27/62 ,  H01J49/04 ,  G01N1/22 ,  G01N1/02 ,  G01N1/40 ,  G01N1/42 ,  G01N30/60 ,  G01N30/72

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：US10401308B2

公开(公告)日：2019-09-03

申请号：US15278470

申请日：2016-09-28

Applicant: Nuctech Company Limited

Inventor： Qingjun Zhang ,  Yuanjing Li ,  Shuwei Li ,  Ziran Zhao ,  Weibin Zhu ,  Junxiao Wang ,  Jianhua Li

IPC: G01T1/20 ,  G01N23/087

Abstract: The present application relates to a dual-energy detection method, system and apparatus. The apparatus includes: a first pixel detector array proximal to a ray source, configured to detect ray source photons having relatively low energy; and a second pixel detector array distal from the ray source, configured to detect ray source photons having relatively high energy; wherein the first pixel detector array includes a plurality of rows of first pixel detectors, the first pixel detector including a first sensitive medium, a first photosensitive device, a first incidence plane, and a first window; the second pixel detector array includes a single row of second pixel detectors, the second pixel detector including a second sensitive medium, a second photosensitive device, a second incidence plane, and a second window; and each of the second pixel detectors has the same pixel area as corresponding plurality of first pixel detectors thereof.

公开(公告)号：US10373701B2

公开(公告)日：2019-08-06

申请号：US14540457

申请日：2014-11-13

Applicant: Nuctech Company Limited

Inventor： Zhiqiang Chen ,  Yuanjing Li ,  Li Zhang ,  Ziran Zhao ,  Jianping Gu ,  Shuo Wang

IPC: G16B5/00 ,  G06F17/18 ,  G06K9/62 ,  G06T17/20

Abstract: Disclosed is method and apparatus for creating a statistical average model of an enamel-dentine junction. The method includes steps of acquiring CT image data of a tooth; segmenting the CT image data to obtain a surface of an enamel-dentine junction; segmenting the obtained surface using a curvature-based clustering algorithm to remove a bottom of the enamel-dentine junction; spherical-parameterizing, by means of spherical harmonic analysis, the surface of the enamel-dentine junction after removal of the bottom; and aligning different samples of the tooth to obtain a statistical average model.

公开(公告)号：US10338236B2

公开(公告)日：2019-07-02

申请号：US15719571

申请日：2017-09-29

Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Yuanjing Li ,  Ziran Zhao ,  Jianmin Li ,  Yulan Li ,  Weibin Zhu ,  Xiang Zou ,  Qingjun Zhang ,  Chunguang Zong ,  Xiaolin Zhao ,  Shuwei Li ,  Junxiao Wang

IPC: G01T1/24 ,  G01T1/17

Abstract: This disclosure provides a radiation detection apparatus and a method, a data processing method and a processor, which relates to the field of radiation detection technology. Wherein, the radiation detection apparatus of this disclosure comprises: a radiation detector which generates an electrical signal by interacting with X-rays; an Analog-to-Digital Converter (ADC) which is coupled to the radiation detector and transmits the electrical signal to a waveform data; and a data processor which receives the waveform data from the ADC, determines the number of single photon signals according to the waveform data, and determines whether an integral signal and/or a count signal of the waveform data will be used for imaging according to the number of the single photon signals.

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：US10107903B2

公开(公告)日：2018-10-23

申请号：US14958245

申请日：2015-12-03

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Zhiqiang Chen ,  Ziran Zhao ,  Wanlong Wu ,  Lin Yang ,  Yingkang Jin ,  Ming Ruan ,  Chengcong Xu

IPC: G01S13/88 ,  G01V8/00 ,  G01S13/89 ,  G01V3/12

Abstract: The present disclosure provides a human body security inspection apparatus, comprising: a base on which an inspected human stands; a millimeter-wave transceiver configured to perform a millimeter-wave scanning operation on the body of the inspected human standing on the base so as to detect whether or not the inspected human carries contraband and output a first signal; and a metal sensing detector arranged within the base and configured to detect whether or not there is a metallic foreign object in underside of a shoe of the inspected human and output a second signal.

公开(公告)号：US10102641B2

公开(公告)日：2018-10-16

申请号：US15204564

申请日：2016-07-07

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Zhiqiang Chen ,  Li Zhang ,  Ziran Zhao ,  Qingping Huang ,  Qiang Li ,  Jianping Gu ,  Yunda Sun

IPC: G06T7/593 ,  G06T7/00 ,  G06K9/00 ,  G06K9/62 ,  G06T11/00 ,  G06T7/68

Abstract: Methods for extracting a shape feature of an object and security inspection methods and apparatuses. Use is made of CT's capability of obtaining a 3D structure. The shape of an object in an inspected luggage is used as a feature of a suspicious object in combination with a material property of the object. For example, a false alarm rate in detection of suspicious explosives may be reduced.

公开(公告)号：US20180260959A1

公开(公告)日：2018-09-13

申请号：US15913222

申请日：2018-03-06

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Chuanhong Huang ,  Qiang Li ,  Jianping Gu ,  Yaohong Liu ,  Ziran Zhao

IPC: G06T7/143

CPC classification number: G06T7/143 ,  G06T7/11 ,  G06T2207/10116 ,  G06T2207/20081 ,  G06T2207/20084 ,  G06T2207/30248

Abstract: An inspection apparatus and a method for segmenting an Image of a vehicle are disclosed. An X-ray transmission scanning is performed on the vehicle to obtain a transmission image. Each pixel of the transmission image is labeled with a category tag, by using a trained convolutional network. Images of respective parts of the vehicle are determined according to the category tag for each pixel. With the above solutions, it is possible to segment the images of respective parts of a vehicle more accurately in the situations that are complicated or have large variety kinds of vehicles.