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：US10935691B2

公开(公告)日：2021-03-02

申请号：US16234625

申请日：2018-12-28

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Kejun Kang ,  Jianmin Li ,  Xiulin Ni ,  Yulan Li ,  Yuanjing Li ,  Zhiqiang Chen ,  Li Zhang ,  Liang Li ,  Xiang Zou ,  Weifeng Yu ,  Hejun Zhou ,  Chunguang Zong

IPC: G01V5/00 ,  G01N23/046

Abstract: The present disclosure relates to the technical field of CT detection, and in particular to a CT inspection system and a CT imaging method. The CT inspection system provided by the present disclosure comprises a radioactive source device, a detection device, a rotation monitoring device and an imaging device, wherein the detection device obtains detection data at a frequency that is N times a beam emitting frequency of the radioactive source device; the rotation monitoring device detects a rotation angle of the detection device and transmits a signal to the imaging device each time the detection device rotates by a preset angle; the imaging device determines a rotational position of the detection device each time the radioactive source device emits a beam according to the signal transmitted by the rotation monitoring device and the detection data of the detection device.

公开(公告)号：US10769821B2

公开(公告)日：2020-09-08

申请号：US16045383

申请日：2018-07-25

Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

Inventor： Yuxiang Xing ,  Li Zhang ,  Jianmin Li ,  Zhiqiang Chen ,  Jianping Gu

IPC: G06T5/20 ,  G06T11/00 ,  G06T5/00 ,  G06T3/40 ,  G06N3/04

Abstract: A method and device for reconstructing a CT image and a storage medium are disclosed. CT scanning is performed on an object to be inspected to obtain projection data on a first scale. Projection data on a plurality of other scales is generated from the projection data on the first scale. Projection data on each scale is processed on the corresponding scale by using a first convolutional neural network to obtain processed projection data, and a back-projection operation is performed on the processed projection data to obtain a CT image on the corresponding scale. CT images on the plurality of scales are fused to obtain a reconstructed image of the object to be inspected.

公开(公告)号：US10754056B2

公开(公告)日：2020-08-25

申请号：US14972115

申请日：2015-12-17

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Ying Li ,  Jianmin Li ,  Tao Song

IPC: G01N23/04 ,  G01V5/00

Abstract: A quick vehicle check system comprises a radiation source which produces a first X ray with a first dose and a second X ray with a second dose, wherein the first dose is smaller than the second dose, and the first X ray is used for checking a first part of a checked vehicle and the second X ray is used for checking a second part of the checked vehicle; a first sensor for detecting a set position of the checked vehicle; a second sensor for detecting a passing distance of the checked vehicle; and a control unit coupled with the first sensor and the second sensor, which receives the set position of the checked vehicle from the first sensor and receives the passing distance of the checked vehicle from the second sensor.

公开(公告)号：US20190192090A1

公开(公告)日：2019-06-27

申请号：US16232072

申请日：2018-12-26

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Liang Li ,  Zhiqiang Chen ,  Kejun Kang ,  Ziran Zhao ,  Li Zhang ,  Yuxiang Xing ,  Tiao Zhao ,  Jianmin Li ,  Bicheng Liu ,  Qian Yi

IPC: A61B6/03 ,  G06T11/00 ,  A61B6/00

Abstract: The present disclosure provides a decomposition method based on basis material combination. In the present disclosure, a scanned object is divided into a plurality of regions, the basis material combinations used in each of the divided regions are different each other, and the scanned object is re-divided according to the re-determined equivalent atomic number of its each point until the change on decomposition coefficient meets certain conditions. Thereby, a decomposition method based on dynamic basis material combinations is realized, which reduces a decomposition error caused by improper selection of the basis material combination and improves the accuracy of the decomposition and substance identification of the multi-energy CT.

公开(公告)号：US10007022B2

公开(公告)日：2018-06-26

申请号：US15709350

申请日：2017-09-19

Applicant: NUCTECH COMPANY LIMITED

Inventor： Chunguang Zong ,  Ying Li ,  Hejun Zhou ,  Jianmin Li ,  Yuanjing Li ,  Yulan Li ,  Li Zhang ,  Zhiqiang Chen

IPC: G01F23/00 ,  G01V5/00

CPC classification number: G01V5/0066 ,  G01V5/0016 ,  G01V5/0025

Abstract: A ray inspection system used to be mounted in a container yard to inspect an object within a container is provided. The ray inspection system includes: a ray generator device configured to emit a ray, a ray receiving device configured to receive the ray, and at least one chamber for receiving the ray generator device and the ray receiving device therein. Each of the at least one chamber is configured to be a standard container or a chamber which has a same shape, a same size and a same structure as a standard container such that the ray inspection system is adapted to be stacked in the container yard.

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：US09823382B2

公开(公告)日：2017-11-21

申请号：US14965122

申请日：2015-12-10

Applicant: Nuctech Company Limited

Inventor： Jianmin Li ,  Yulan Li ,  Jingyu Gu ,  Yuanjing Li ,  Quanwei Song ,  Weizhen Wang ,  Dongyu Wang ,  Zhiqiang Chen ,  Chaunxiang Tang ,  Yinong Liu ,  Junli Li ,  Tao Xue ,  Hui Gong ,  Xuewu Wang

IPC: G01N23/02 ,  G01K1/04 ,  G01V5/00 ,  B60R11/00

CPC classification number: G01V5/0016 ,  B60R11/00 ,  B60R2011/004

Abstract: A vehicle mounted mobile container or vehicle inspection system, including: a radiation source, a movable vehicle for carrying the inspection system, and a detector arm rack which has a horizontal arm and a vertical arm, a first end of the horizontal arm is connected to the vehicle and a second end thereof is connected to an end of the vertical arm. The horizontal arm and the vertical arm are connected by a pivotal connecting device such that the vertical arm may pivot in a vertical plane, and the horizontal arm and the vertical arm may be retracted in a same horizontal plane. The novel arm rack construction may reduce the space occupied by it on top of the scanning vehicle after the arm rack is stowed so as to reduce the eight of the scanning vehicle under running condition.

公开(公告)号：US09685247B2

公开(公告)日：2017-06-20

申请号：US14459408

申请日：2014-08-14

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Kejun Kang ,  Yuanjing Li ,  Ying Li ,  Jianmin Li ,  Junli Li ,  Yanli Deng

IPC: G21F3/00 ,  G01V5/00 ,  G21F1/02 ,  G21F1/04

CPC classification number: G21F3/00 ,  G01V5/0016 ,  G21F1/023 ,  G21F1/042

Abstract: A radiation protection device is disclosed in the embodiment of the present invention. The radiation protection device is used for a system which is configured to perform safety inspection of a cargo or a vehicle by a ray. The radiation protection device comprising: at least one container, and a radiation protection part disposed within the container. The radiation protection material may comprise at least one of concrete, sandstone, and water, or the radiation protection part may comprise a steel-lead protection wall or a concrete protection wall. With the radiation protection device according to the embodiment of the present invention, after the container is transported to the site, it can be directly put in place to be capable of shielding rays without needing operation or with only simple operation. The amount of on-site work, construction time, and construction cost are low.

公开(公告)号：US20150192531A1

公开(公告)日：2015-07-09

申请号：US14412516

申请日：2013-07-02

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Jianmin Li ,  Yinong Liu ,  Yulan Li ,  Chunguang Zong ,  Hui Gong ,  Qingping Huang ,  Weifeng Yu

IPC: G01N23/10 ,  G01V5/00

CPC classification number: G01N23/10 ,  G01N23/04 ,  G01N2223/301 ,  G01N2223/308 ,  G01V5/0016 ,  G01V5/0066

Abstract: The present invention discloses a vehicular radiation inspection system comprising a mobile vehicle body, a detection arm, a radiation source and a detector. The vehicular radiation inspection system further comprises a following mechanism separated from the detection arm. The following mechanism contains radiation protection material, and the following mechanism follows the detection arm to move in a non-contact manner during inspection of the inspected object, so as to prevent radiation leakage. In the present invention, it does not need to infuse radiation protection material having a high density, such as lead, into the detection arm. Therefore, it can effectively decrease the weight of the detection arm, and it does not need to provide a balance counterweight on the mobile vehicle body on which the detection arm is carried, thereby effectively solving the problem that the vehicular radiation inspection system has an excessively large mass. Meanwhile, in the present invention, the moving process of the following mechanism is accurately controlled, so as to prevent the following mechanism from hitting the detection arm.

Abstract translation: 本发明公开了一种包括移动车身，检测臂，辐射源和检测器的车辆辐射检查系统。 车辆辐射检查系统还包括与检测臂分离的跟随机构。 以下机构包含辐射防护材料，并且在检查被检查物体的检查期间，跟随检测臂的机构以非接触的方式移动，以防止辐射泄漏。 在本发明中，不需要将诸如铅的高密度的辐射防护材料注入到检测臂中。 因此，能够有效地降低检测臂的重量，并且不需要在携带检测臂的移动体上提供平衡配重，从而有效地解决了车辆用辐射检查系统过度的问题 大量。 同时，在本发明中，精确地控制以下机构的移动过程，以防止以下机构撞击检测臂。