公开(公告)号：US20190156139A1

公开(公告)日：2019-05-23

申请号：US16255738

申请日：2019-01-23

Applicant: NUCTECH COMPANY LIMITED

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Ziran ZHAO ,  Yaohong LIU ,  Duokun ZHANG ,  Jianping GU ,  Qiang LI ,  Jian ZHANG

IPC: G06K9/32 ,  G01N23/046 ,  G01V5/00

CPC classification number: G06K9/3241 ,  G01N23/046 ,  G01V5/0016 ,  G01V5/005

Abstract: An inspection method and system for inspecting whether there is any liquor in goods is provided. The method includes: acquiring a radiation image of goods being inspected; processing on the radiation image to obtain an ROI; inspecting on the ROI using a liquor goods inspection model to determine if the ROI of the radiation image contains liquor goods. The above solution performs liquor inspection on scanned images of goods, especially containers, so as to intelligently assist the image inspectors.

公开(公告)号：US20190086562A1

公开(公告)日：2019-03-21

申请号：US16175796

申请日：2018-10-30

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Yuxiang XING ,  Xiaoyue GUO ,  Zhi DENG ,  Le SHEN ,  Li ZHANG ,  Zhiqiang CHEN ,  Liang LI

IPC: G01T1/36 ,  G01N23/04

Abstract: An X-ray detection method and an X-ray detector are provided. The X-ray detection method according to embodiments of the present disclosure includes: dividing an energy range of photons emitted by an X-ray source into a number N of energy windows, where N is an integer greater than 0; obtaining a weighting factor for each of the number N of energy windows based on linear attenuation coefficients of a substance of interest and a background substance of an imaging target; obtaining a weighting factor matrix for M output channels of an X-ray detector based on the weighting factor for each of the number N of energy windows, where M is an integer greater than 0; and obtaining output results of the M output channels based on the weighting factor matrix and numbers of photons having an energy range falling into individual energy windows of the number N of energy windows.

公开(公告)号：US20190064082A1

公开(公告)日：2019-02-28

申请号：US16168850

申请日：2018-10-24

Applicant: Nuctech Company Limited

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Mingzhi HONG ,  Yong ZHOU ,  Yihong LIU

IPC: G01N23/10 ,  G21F3/00 ,  G21F1/08

Abstract: A device comprises: at least two lead curtains; a supporting assembly comprising a working area and a standby area; a first transmission assembly to drive the lead curtains to move in a conveying channel; and a second transmission assembly to transfer the lead curtains between the standby area and the working area, wherein the second transmission assembly transfers the lead curtains from the standby area to the working area, so that the lead curtains fall into a starting point of the conveying channel and are located behind an article to be detected; the first transmission assembly drives the lead curtains to move with the article to be detected in front and drive the lead curtains to move from the starting point of the working area to a starting point of the standby area; and the second transmission assembly drives the lead curtains to enter and move in the standby area.

公开(公告)号：US20190056338A1

公开(公告)日：2019-02-21

申请号：US16045243

申请日：2018-07-25

Applicant: Tsinghua University ,  NUCTECH COMPANY LIMITED

Inventor： Liang LI ,  Zhiqiang CHEN ,  Li ZHANG ,  Ziran ZHAO ,  Yuxiang XING ,  Siyuan ZHANG

IPC: G01N23/2206 ,  G01N23/046 ,  G01N23/223 ,  A61B6/03 ,  A61B6/06 ,  A61B6/10 ,  A61B6/00

Abstract: The present disclosure discloses a ray transmission and fluorescence CT imaging system and method. The system comprises: a ray source configured to emit a beam of rays; a rotational scanning device configured to perform rotational CT scanning on an object to be inspected; a transmission CT detector configured to receive the beam of rays which has passed through the object; a fluorescence CT detector configured to receive fluorescent photons excited by irradiation of the beam of rays on the object; a data acquisition unit configured to acquire a transmission data signal and a fluorescence data signal respectively; and a control and data processing unit configured to control the ray source to emit the beam of rays, control the rotational scanning device to perform the rotational CT scanning, and obtain a transmission CT image and a fluorescence CT image simultaneously based on the transmission data signal and the fluorescence data signal.

公开(公告)号：US20190035116A1

公开(公告)日：2019-01-31

申请号：US16045303

申请日：2018-07-25

Applicant: Tsinghua University ,  NUCTECH COMPANY LIMITED

Inventor： Yuxiang XING ,  Li ZHANG ,  Jianmin LI ,  Zhiqiang CHEN ,  Jianping GU

IPC: G06T11/00 ,  G06N5/04 ,  G06N3/08 ,  G06N3/04 ,  G06T5/00

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. The projection data is processed using a first convolutional neural network to obtain processed projection data. The first convolutional neural network comprises a plurality of convolutional layers. A back-projection operation is performed on the processed projection data to obtain a reconstructed image.

公开(公告)号：US20180328866A1

公开(公告)日：2018-11-15

申请号：US16029896

申请日：2018-07-09

Applicant: Nuctech Company Limited

Inventor： Kejun KANG ,  Zhiqiang CHEN ,  Yuanjing LI ,  Li ZHANG ,  Ziran ZHAO ,  Yaohong LIU ,  Jianping GU ,  Liang LI ,  Yuxiang XING

IPC: G01N23/046 ,  G01V5/00

CPC classification number: G01N23/046 ,  G01V5/005

Abstract: The present disclosure provides a low-angle self-swinging type computed tomography (CT) apparatus, which is provided with an X-ray accelerator and a plurality of rows of detectors and is configured to include a slip ring, such that the slip ring with the accelerator and the detectors thereon is capable of performing a single-pendulum reciprocating movement while an objected to be inspected passes through the slip ring, a three dimension CT image of the object is displayed, thereby achieving accurate inspection for large-scale objects, such as van containers.

公开(公告)号：US20180173967A1

公开(公告)日：2018-06-21

申请号：US15822920

申请日：2017-11-27

Applicant: Nuctech Company Limited

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Gang PENG ,  Zhisheng DAI ,  Yunda SUN ,  Dong LI

IPC: G06K9/00 ,  G06K9/78 ,  G06K9/46 ,  G06T7/00

Abstract: The present disclosure relates to a security check system and method. The present disclosure provides a security check system for identifying objects of interest from multiple objects, comprising: an object-of-interest determining device for determining whether an object is an object of interest; an image mark applying device for acquiring images related to selected objects among the multiple objects and recording image marks of the selected objects; and a mark detecting device for detecting the image marks, wherein the security check system is configured to identify whether the object is the object of interest based on the detection of the mark detecting device and outputs a warning accordingly.

公开(公告)号：US20180158785A1

公开(公告)日：2018-06-07

申请号：US15718919

申请日：2017-09-28

Applicant: Tsinghua University ,  NUCTECH COMPANY LIMITED

Inventor： Wenjian ZHANG ,  Qingjun ZHANG ,  Yuanjing LI ,  Zhiqiang CHEN ,  Ziran ZHAO ,  Yinong LIU ,  Yaohong LIU ,  Xiang ZOU ,  Huishao HE ,  Weishu LI ,  Nan BAI

IPC: H01L23/00 ,  H01L31/02 ,  H01L31/024 ,  H01L31/18 ,  H01L23/15 ,  H01L23/498

Abstract: The present disclosure proposes a packaging structure for a metallic bonding based opto-electronic device and a manufacturing method thereof. According to the embodiments, the packaging structure for an opto-electronic device may comprise an opto-electronic chip and a packaging base. The opto-electronic chip comprises: a substrate having a first substrate surface and a second substrate surface opposite to each other; an opto-electronic device formed on the substrate; and electrodes for the opto-electronic device which are formed on the first substrate surface. The packaging base has a first base surface and a second base surface opposite to each other, and comprises conductive channels extending from the first base surface to the second base surface. The opto-electronic chip is stacked on the packaging base in such a manner that the first substrate surface faces the packaging base, and the electrodes formed on the first substrate surface of the opto-electronic chip are bonded with corresponding conductive channels in the packaging base.

公开(公告)号：US20170276619A1

公开(公告)日：2017-09-28

申请号：US15300751

申请日：2015-12-14

Applicant: NUCTECH COMPANY LIMITED

Inventor： Huaping TANG ,  Zhiqiang CHEN ,  Yuanjing LI ,  Xin JIN ,  Zhuoyan LIU ,  Yonggang WANG ,  Hua PENG ,  Zhanfeng QIN

IPC: G01N23/04 ,  G01V5/00

CPC classification number: G01N23/04 ,  G01V5/0016 ,  G01V5/005

Abstract: Embodiments of the present invention provide a trailed multiple-viewing-angle item inspection system and method of operating the same. The inspection system includes: a trailer vehicle, a radiation inspection device, a power supply device and a power grid connection device. The trailer vehicle is mounted with a power supply chamber within which a power supply device and a power grid connection device are mounted and an inspection chamber within which a radiation inspection device is mounted. The radiation inspection device includes: ray radiation source configured to emit X-rays from various positions, detectors, a body frame, a transfer device, a data and image process system and a display and operation device. The trailed multiple-viewing-angle item inspection system of the present invention can obtain a transmission image containing depth information of an item by its one pass through the device, and achieve a high-speed inspection, a good image quality and a high inspection efficiency of hazardous articles, and its flexibility and movability can meet requirements in various working conditions.

公开(公告)号：US20170184758A1

公开(公告)日：2017-06-29

申请号：US15280835

申请日：2016-09-29

Applicant: NUCTECH COMPANY LIMITED

Inventor： Zhiqiang CHEN ,  Ziran ZHAO ,  Yuanjing LI ,  Wanlong WU ,  Le TANG ,  Ming RUAN

IPC: G01V5/00 ,  H05G1/32

CPC classification number: G01V5/0016 ,  H05G1/32

Abstract: The present disclosure provides a human body security inspection system, including: an X-ray source configured to provide X-ray radiation for scanning a human body to be inspected, a detector configured to receive X-ray radiation transmitting through the human body to be inspected and generate a transmission signal, a sensor configured to obtain the weight of the human body to be inspected, a carrying device configured to carry and move the human body to be inspected in a direction such that the human body is scanned, and a controller configured to receive a signal from the sensor, determine the weight of the human body to be inspected based on the signal from the sensor, and determine and control a voltage and/or current applied to the X-ray source and a movement speed of the carrying device according to the weight.