公开(公告)号：US11925183B2

公开(公告)日：2024-03-12

申请号：US17661257

申请日：2022-04-28

申请人： Tsinghua University ,  Nuctech Company Limited

发明人： Zhiqiang Chen ,  Li Zhang ,  Qingping Huang ,  Yong Zhou ,  Hui Ding ,  Chao Ji

IPC分类号： G01N23/046 ,  A22B5/00 ,  G01N23/083 ,  G01N23/18 ,  G01N33/12

CPC分类号： A22B5/007 ,  G01N23/046 ,  G01N23/083 ,  G01N23/18 ,  G01N33/12 ,  G01N2223/1016 ,  G01N2223/204 ,  G01N2223/30 ,  G01N2223/3307 ,  G01N2223/3308 ,  G01N2223/419 ,  G01N2223/5015 ,  G01N2223/618 ,  G01N2223/643

摘要： The present disclosure relates to a static CT detection device, including: a shielding body, formed with a detection channel through which an object under detection can pass; a ray source, emitting rays for detecting the object under detection when the object under detection passes through the detection channel; and a detector, for acquiring the rays emitted by the ray source and having passed through the detection channel, wherein the shielding body is formed with an opening portion, and the opening portion extends from an inlet of the detection channel to an outlet of the detection channel.

公开(公告)号：US11613913B2

公开(公告)日：2023-03-28

申请号：US15733351

申请日：2020-01-13

申请人： Nuctech Company Limited ,  Tsinghua University

发明人： Zhiqiang Chen ,  Yuanjing Li ,  Xianghao Wu ,  Shiguo Liu ,  Dawei Shi

IPC分类号： E05B47/00 ,  E05B47/06 ,  E05B67/06

摘要： The present disclosure provides an intelligent lock. In an embodiment, the intelligent lock includes: a lock body having a lock hole; a lock lever, the lock lever being capable of being plugged into and being unplugged out of the lock hole of the lock body; a first restricting member movably provided inside the lock body, and capable of being moved and latched into the lock hole to restrict the plugging of the lock lever into the lock hole or the unplugging of the lock lever out of the lock hole; a second restricting member movably provided inside the lock body, and capable of being abutted against the first restricting member so as to restrict a movement of the first restricting member; a detecting device provided in the lock body, and configured to detect the plugging operation of the lock lever into the lock hole or the unplugging operation of the lock lever out of the lock hole and to send a detection signal; and a main control element communicatively connected to the detecting device, and configured to determine a locking state of the intelligent lock in accordance with the detection signal sent by the detecting device.

公开(公告)号：US11369333B2

公开(公告)日：2022-06-28

申请号：US16946508

申请日：2020-06-24

申请人： Tsinghua University ,  Nuctech Company Limited ,  Nucway Company Limited

发明人： Zhiqiang Chen ,  Yuanjing Li ,  Zhiwei Han ,  Guang Yang ,  Huaili Qin ,  Wenyuan Qi ,  Shan Kuang ,  Aifeng Liang ,  Yanqin Liu

IPC分类号： A61B6/00 ,  A61B6/02

摘要： The present disclosure provides a method and apparatus for detecting a dose distribution of an article. The method includes performing a fluoroscopy scanning on the article to be detected, to obtain mass data per unit area or unit volume for each point of the article to be detected; obtaining corresponding dose distribution data based on the mass data per unit area or unit volume and a preset mapping model, wherein the preset mapping model includes a mapping relationship between mass per unit area or unit volume and the dose distribution of the article under irradiation of a preset amount of energy; and matching the dose distribution data with a fluoroscopy image of the article to be detected, to generate and display a radiation image.

公开(公告)号：US20210203180A1

公开(公告)日：2021-07-01

申请号：US15733444

申请日：2020-01-21

申请人： Nuctech Company Limited ,  Tsinghua University

发明人： Zhiqiang Chen ,  Yuanjing Li ,  Xianghao Wu ,  Yongning Chen

IPC分类号： H02J7/02 ,  H02J7/00 ,  E05B47/00

摘要： An embodiment of the present disclosure discloses a wireless charging device comprising a wireless receiving module, a controller, a first charging module, and a second charging module. The wireless receiving module is configured to receive a wireless charging signal in response to the wireless charging device being in a wireless sensing area, transmit a state indication signal to the controller, receive a charging indication signal from the controller, and determine whether to transmit the wireless charging signal to the first charging module according to the charging indication signal. The controller is configured to transmit the charging indication signal to the wireless receiving module according to the state indication signal, and in response to the charging indication signal instructing the wireless receiving module to transmit the wireless charging signal, output a control signal to the first charging module to control the first charging module to receive the wireless charging signal, charge the second charging module, and output an electrical signal. The first charging module is configured to, in response to receiving the control signal, receive the wireless charging signal, charge the second charging module, and output the electrical signal.

公开(公告)号：US10983243B2

公开(公告)日：2021-04-20

申请号：US16491891

申请日：2017-12-20

申请人： Tsinghua University ,  NUCTECH COMPANY LIMITED

发明人： Zhiqiang Chen ,  Yuanjing Li ,  Ziran Zhao ,  Wanlong Wu ,  Ming Ruan ,  Yingkang Jin ,  Guangwei Ding ,  Zongjun Shen ,  Jiajiang Zhao

IPC分类号： G01V5/00 ,  G21K1/10 ,  G01N23/203

摘要： A human body security inspection apparatus, a method of operating the same, and an associated filter device are disclosed. The human body security inspection apparatus includes a radiation beam exit configured for emitting a radiation beam; a beam guiding box configured for guiding the radiation beam; and a filter device configured between the radiation beam exit and the beam guiding box. The filter device includes a housing and a filter cage having a central axis. The filter cage is formed by arranging two or more pairs of filtering sheets, which are made of different materials and/or have different thicknesses, in an encircling way. The filter cage is rotatable about its central axis such that at least one pair of filtering sheets is capable of filtering the radiation beam to adjust an outputted dosage of the radiation beam of the human body security inspection apparatus.

公开(公告)号：US10935691B2

公开(公告)日：2021-03-02

申请号：US16234625

申请日：2018-12-28

申请人： TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

发明人： 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分类号： G01V5/00 ,  G01N23/046

摘要： 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

申请人： NUCTECH COMPANY LIMITED ,  Tsinghua University

发明人： Yuxiang Xing ,  Li Zhang ,  Jianmin Li ,  Zhiqiang Chen ,  Jianping Gu

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

摘要： 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：US20190192090A1

公开(公告)日：2019-06-27

申请号：US16232072

申请日：2018-12-26

申请人： TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

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

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

摘要： 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：US10295481B2

公开(公告)日：2019-05-21

申请号：US15262894

申请日：2016-09-12

申请人： Tsinghua University ,  NUCTECH COMPANY LIMITED

发明人： Zhiqiang Chen ,  Li Zhang ,  Tianyi Yang Dai ,  Ji Zhao ,  Xin Jin ,  Ming Chang

IPC分类号： G01N23/20 ,  G01N23/00 ,  G01N23/046 ,  G01N23/083 ,  G01N23/207 ,  G21K1/02 ,  G01V5/00

摘要： The present disclosure relates to detection systems and methods. One illustrative detection system may include a distributed radiation source having a plurality of radiation source focus points, which irradiate an object under detection, wherein the plurality of radiation source focus points are divided into a certain number of groups, and a primary collimator that limits rays of each of the radiation source focus points such that the rays emit into an XRD detection device. An XRD detection device may include a plurality of XRD detectors that are divided into the same number of groups as the radiation source focus points, wherein XRD detectors in a same group are arranged to be separated by XRD detectors in other groups, and rays of each of the radiation source focus points are received by XRD detectors having the same group number as the group number of the radiation source focus point.

公开(公告)号：US10274636B2

公开(公告)日：2019-04-30

申请号：US14582076

申请日：2014-12-23

申请人： NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

发明人： Huaping Tang ,  Zhiqiang Chen ,  Chuanxiang Tang ,  Huaibi Chen ,  Yuanjing Li ,  Ziran Zhao ,  Yaohong Liu ,  Shangmin Sun ,  Xinshui Yan ,  Zhanfeng Qin

IPC分类号： G01V5/00 ,  G03C9/00 ,  G01N23/04

摘要： The present invention may perform fluoroscopic imaging simultaneously on the subjects in at least two channels using only one electron accelerator, at least two sets of X-ray beams and at least two sets of detector systems, through the design of the electron accelerator, the shielding and collimating device, the at least two detector arrays and various mechanical composite structures. The X-ray fluoroscopic imaging system according to the present invention may be designed in specific forms of a stationary type, an assembled type, a track mobile type or vehicular mobile type, etc., and has advantages such as simple structure, low cost, strong function, good image quality and the like.