公开(公告)号：US10795050B2

公开(公告)日：2020-10-06

申请号：US16233387

申请日：2018-12-27

Applicant: TSINGHUA UNIVERSITY ,  Nuctech Company Limited

Inventor： Ying Li ,  Jianmin Li ,  Jinguo Cao ,  Yuan Ma ,  Yulan Li ,  Yuan He ,  Yuanjing Li ,  Hui Meng ,  Zhiqiang Chen ,  Yiwei Guo ,  Li Zhang

IPC: G01V5/00 ,  G06K9/00

Abstract: A vehicle detection system includes a transverse detector arm, two vertical detector arms, a radiation source, a plurality of transverse detectors, and a plurality of vertical detectors. The transverse detector arm may be disposed on the ground. Two vertical detector arms are disposed at both ends of the transverse detector arm. The radiation source is located above the transverse detector arm. A plurality of transverse detectors are disposed within the transverse detector arm and are laid along a length direction of the transverse detector arm for receiving ray emitted by the radiation source. The plurality of vertical detectors are symmetrically disposed on the two vertical detector arms, and each of the vertical detectors is disposed towards a center point of the radiation source for receiving ray emitted by the radiation source.

公开(公告)号：US10724969B2

公开(公告)日：2020-07-28

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: G01N23/04 ,  A61B6/00 ,  G01N23/046 ,  A61B6/03

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：US10654196B2

公开(公告)日：2020-05-19

申请号：US15815819

申请日：2017-11-17

Applicant: Nuctech Company Limited

Inventor： Yanchun Wang ,  Qingjun Zhang ,  Yuanjing Li ,  Zhiqiang Chen ,  Ziran Zhao ,  Yinong Liu ,  Yaohong Liu ,  Nan Bai

IPC: B29C33/00 ,  C04B35/50 ,  B30B11/00 ,  B30B15/02 ,  B22F3/14 ,  C04B35/645 ,  B28B3/00 ,  C04B35/515 ,  C04B35/547 ,  G01T1/20 ,  C04B111/80

Abstract: A mold and a method of manufacturing GOS ceramic scintillator by using the mold are provided. The mold comprises: a female outer sleeve having a cavity disposed inside; a plurality of female blocks disposed inside the cavity, the plurality of female blocks being put together to form a composite structure having a vertical through hole; and a male upper pressing head and a male lower pressing head, wherein each of the male upper pressing head and the male lower pressing head has a shape consistent with that of the vertical through hole. The disclosure may reduce defects of the related art in hot-pressing-sintering such as a mold has a short retirement period and a high material waste, significantly reduce the cost for production of the GOS ceramic scintillator, and significantly improve a process economy.

公开(公告)号：US10607483B2

公开(公告)日：2020-03-31

申请号：US15300947

申请日：2015-12-23

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Zhiqiang Chen ,  Li Zhang ,  Jianmin Li ,  Ziran Zhao ,  Yaohong Liu ,  Qiang Li ,  Zheng Hu ,  Jianping Gu ,  Ying Li

IPC: G08G1/054 ,  G08G1/017 ,  G06K9/46 ,  G01V5/00 ,  G08G1/015

Abstract: Disclosed is a vehicle identification method and system. The method includes: acquiring appearance information of an inspected vehicle; obtaining external features of the vehicle based on the appearance information; acquiring a transmission image of the vehicle and obtaining internal features of the vehicle from the transmission image; forming descriptions on the vehicle at least based on the external features and the internal features; and determining a vehicle model of the vehicle from a vehicle model databased by utilizing the descriptions. This method merges various types of modality information, especially introducing the transmission image, and combines the internal structure information with the appearance information, so that the present disclosure can identify a vehicle model more practically.

公开(公告)号：US10481294B2

公开(公告)日：2019-11-19

申请号：US15727637

申请日：2017-10-09

Applicant: NUCTECH COMPANY LIMITED

Inventor： Xuping Fan ,  Quanwei Song ,  Zhiqiang Chen ,  Shangmin Sun

IPC: G01V5/00

Abstract: The present invention relates to an inspection system. The inspection system comprises a base, a boom lifting mechanism provided on the base, and a boom mounting a detector. The boom lifting mechanism includes at least two support arms arranged sequentially. The at least two support arms include a base arm and a distal arm. The base arm is connected to the base, the boom is mounted on the distal arm, the inspection system has a scanning state and a transporting state, and two adjacent support arms of the at least two support arms are rotatably connected so that the height of the boom in the scanning state is different from that in the transporting state. The boom lifting mechanism of the inspection system of the present invention lifts the boom by rotatably connecting two adjacent support arms, and presents less required driving force compared to the lifting of the boom directly in a vertical direction in the prior art. Thus, there is less weight of the driving mechanism for driving the lifting of the boom, so as to reduce the self-weight of the inspection system.

公开(公告)号：US10448904B2

公开(公告)日：2019-10-22

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: G06K9/00 ,  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：US10430669B2

公开(公告)日：2019-10-01

申请号：US15719309

申请日：2017-09-28

Applicant: Nuctech Company Limited

Inventor： Hu Tang ,  Li Zhang ,  Zhiqiang Chen ,  Jiamin Zhang

IPC: G06K9/00 ,  H04N7/18 ,  H04N21/233 ,  H04L29/08 ,  G08B13/196

Abstract: A method, server and system for operating on security inspection data is disclosed. In one aspect, an example method performed by a server for operating on security inspection data includes receiving an operation request for target security inspection data from a client through a network. The target security inspection data is loaded from a storage server based on the operation request. Image processing on the loaded target security inspection data is performed. The processed target security inspection data or a graphic interface including the processed target security inspection data is encoded. The encoded target security inspection data or graphic interface is transmitted to the client through the network in a video stream.

公开(公告)号：US10397491B2

公开(公告)日：2019-08-27

申请号：US14981947

申请日：2015-12-29

Applicant: NUCTECH COMPANY LIMITED

Inventor： Mingliang Li ,  Yuanjing Li ,  Jianmin Li ,  Ying Li ,  Zhiqiang Chen ,  Kejun Kang

IPC: G06T7/60 ,  H04N5/247 ,  G01C11/06 ,  G01P3/68 ,  G01B11/04 ,  G06T7/292

Abstract: The present invention relates to a photogrammetry system and method. The photogrammetry system comprises: photographing devices capable of photographing an object at a predetermined time interval; and, a data processing device capable of calculating an actual length of the object or a certain portion on the object according to a length of the object or a certain portion on the object in the images obtained by the photographing devices and a distance of the object in the two images, wherein the object moves at a speed V; the photographing devices photograph the object for two times at a time interval t; the distance of the object in the two images obtained by the two times of photographing is Dp; the length of the object or a certain portion on the object in the images is Lp; and, the actual length L of the object or a certain portion on the object may be obtained by the following formula: L = Lp × Vt Dp .

公开(公告)号：US10371648B2

公开(公告)日：2019-08-06

申请号：US15301345

申请日：2015-12-14

Applicant: NUCTECH COMPANY LIMITED

Inventor： Li Zhang ,  Xin Jin ,  Huaping Tang ,  Qingping Huang ,  Yunda Sun ,  Zhiqiang Chen

IPC: G01N23/00 ,  G01N23/04 ,  G01N23/046 ,  G01V5/00

Abstract: The present disclosure discloses a radiography system including: a ray source, comprising a plurality of X-ray generators which are distributed on one or more planes intersected with a moving direction of an object being inspected; a detector module comprising a plurality of detection units; a data collection circuit; a controller, configured to control at least two X-ray generators of the plurality of X-ray generators in the ray source to generate X-rays alternately such that the object is scanned by the generated X-rays; and control the detector module and the data collection circuit to respectively obtain detection data corresponding to the at least two X-ray generators; and a data processing computer, configured to create images of the object being inspected in view angles of the at least two X-ray generators based on the detection data. The above embodiments may implement a multi-view-angle perspective imaging system within a single scan plane by utilizing a distributed X-ray source and reuse of the detectors.

公开(公告)号：US10332244B2

公开(公告)日：2019-06-25

申请号：US15610930

申请日：2017-06-01

Applicant: Nuctech Company Limited

Inventor： Zhiqiang Chen ,  Yuanjing Li ,  Ziran Zhao ,  Yaohong Liu ,  Jianping Gu ,  Zhiming Wang

IPC: G06T7/00

Abstract: A method and an apparatus for estimating an image fuzziness are provided. The method may comprise: acquiring an image; obtaining a multi-scale representation of the image by performing a multi-scale transform on the image; calculating gradients of the image and a normalized histogram of the gradients at each scale based on the multi-scale representation; calculating error vectors between the normalized histogram of gradients at each scale and a normalized original histogram of gradients of the image; performing a weighted summing on the error vectors by using respective weights to obtain a summed result, wherein the weights are determined based on a reciprocal of the sums of squares of the gradients of the image at each scale; estimating the ambiguity of the image based on the summed result.