公开(公告)号：US20190089344A1

公开(公告)日：2019-03-21

申请号：US16110355

申请日：2018-08-23

Applicant: Nuctech Company Limited

Inventor： Yaohong Liu ,  Ziran Zhao ,  Jinsheng Liu ,  Wei Jia ,  Wei Li ,  Xinshui Yan

IPC: H03K17/0812 ,  H03K17/567

Abstract: The disclosed technology relates to a gate protection circuit for an Insulated Gate Bipolar Transistor (IGBT), the IGBT being used as a switch device in a solid state pulse modulator based on the MARX generator principle, the gate protection circuit including: a voltage regulator configured to supply a stable voltage to an emitter of the IGBT with respect to the ground for a gate of the IGBT.

公开(公告)号：US10156528B2

公开(公告)日：2018-12-18

申请号：US15691748

申请日：2017-08-31

Applicant: NUCTECH COMPANY LIMITED

Inventor： Zhiqiang Chen ,  Yuanjing Li ,  Shangmin Sun ,  Yu Hu ,  Yuan Ma ,  Qiangqiang Wang ,  Long Du ,  Wei Li

IPC: G01F23/00 ,  G01N23/04 ,  G05D1/00 ,  G01V5/00

Abstract: This invention relates to a movable divided inspection system and method, wherein the scanning inspection system comprises a first radiation source, a first detection means, a first automated guided vehicle and a second automated guided vehicle. The first radiation source is mounted on the first automated guided vehicle. The first detection means is mounted on the second automated guided vehicle. The first automated guided vehicle and the second automated guided vehicle are able to drive the first radiation source and the first detection means to a preset scan inspection position, so as to form a scanning passage for passage of an article to be scanned between the first and second automated guided vehicle, such that scanning inspection of said article to be scanned is realized by relative movement of said article to be scanned with reference to said first automated guided vehicle and said second automated guided vehicle.

公开(公告)号：US12131543B2

公开(公告)日：2024-10-29

申请号：US17202088

申请日：2021-03-15

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Li Zhang ,  Zhiqiang Chen ,  Yuanjing Li ,  Yuxiang Xing ,  Fanhua Meng ,  Qiang Li ,  Wei Li ,  Gang Fu

IPC: G06F16/583 ,  G06F16/55 ,  G06V10/20 ,  G06V10/75 ,  G06V10/764 ,  G06V10/82 ,  G06V20/20 ,  G06V20/52 ,  G06Q10/0832

CPC classification number: G06V20/52 ,  G06F16/55 ,  G06F16/583 ,  G06V10/255 ,  G06V10/75 ,  G06V10/764 ,  G06V10/82 ,  G06V20/20 ,  G06Q10/0832

Abstract: A semantic-based method and apparatus for retrieving a perspective image, an electronic device and a computer-readable storage medium are provided. An method includes obtaining a perspective image for a space containing an inspected object therein. A semantic division on the perspective image is performed using a first method, to obtain a plurality of semantic region units. A feature extraction network is constructed using a second method. Based on the perspective image and each of the plurality of semantic region units, a feature of each semantic region unit is extracted using the feature extraction network. Based on the feature of each semantic region unit, an image most similar to the semantic region unit is retrieved from an image feature database, to assist in determining an inspected object in the semantic region unit.

公开(公告)号：US11152932B2

公开(公告)日：2021-10-19

申请号：US16110355

申请日：2018-08-23

Applicant: Nuctech Company Limited

Inventor： Yaohong Liu ,  Ziran Zhao ,  Jinsheng Liu ,  Wei Jia ,  Wei Li ,  Xinshui Yan

IPC: H03K17/0812 ,  H03K3/57 ,  H03K17/081 ,  H03K17/567 ,  H03K17/06

Abstract: The disclosed technology relates to a gate protection circuit for an Insulated Gate Bipolar Transistor (IGBT), the IGBT being used as a switch device in a solid state pulse modulator based on the MARX generator principle, the gate protection circuit including: a voltage regulator configured to supply a stable voltage to an emitter of the IGBT with respect to the ground for a gate of the IGBT.

公开(公告)号：US20210286842A1

公开(公告)日：2021-09-16

申请号：US17202088

申请日：2021-03-15

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Li Zhang ,  Zhiqiang Chen ,  Yuanjing Li ,  Yuxiang Xing ,  Fanhua Meng ,  Qiang Li ,  Wei Li ,  Gang Fu

IPC: G06F16/583 ,  G06K9/00 ,  G06F16/55

Abstract: A semantic-based method and apparatus for retrieving a perspective image, an electronic device and a computer-readable storage medium are provided. An method includes obtaining a perspective image for a space containing an inspected object therein. A semantic division on the perspective image is performed using a first method, to obtain a plurality of semantic region units. A feature extraction network is constructed using a second method. Based on the perspective image and each of the plurality of semantic region units, a feature of each semantic region unit is extracted using the feature extraction network. Based on the feature of each semantic region unit, an image most similar to the semantic region unit is retrieved from an image feature database, to assist in determining an inspected object in the semantic region unit.

公开(公告)号：US20180059068A1

公开(公告)日：2018-03-01

申请号：US15691746

申请日：2017-08-31

Applicant: Nuctech Company Limited

Inventor： Zhiqiang Chen ,  Yuanjing Li ,  Shangmin Sun ,  Yu Hu ,  Xuejing Yang ,  Qiangqiang Wang ,  Long Du ,  Wei Li

IPC: G01N29/265 ,  G01N27/90 ,  G01N23/14 ,  G01N19/08

CPC classification number: G01N23/10 ,  G01N27/902 ,  G01V5/0025

Abstract: This invention relates to a movable article inspection system and inspection method, wherein the inspection system comprises: a first automated guided vehicle, a radiation source and a detection mechanism; said radiation source and said detection mechanism are both mounted on said first automated guided vehicle, said first automated guided vehicle is able to move to a preset scanning inspection position, such that scanning inspection of said article to be scanned is effectuated by means of relative movement between an article to be scanned and the first automated guided vehicle. Such movable inspection system based on an automated guided vehicle is capable of making full use of an existing automated guided vehicle and its control system to make a movement path of the inspection system more flexible, and capable of effectuating centralized control and management of the inspection system, so that it can improve inspection efficiency, and save labor cost.

公开(公告)号：US20180059282A1

公开(公告)日：2018-03-01

申请号：US15691747

申请日：2017-08-31

Applicant: Nuctech Company Limited

Inventor： Zhiqiang Chen ,  Yuanjing Li ,  Shangmin Sun ,  Yu Hu ,  Yuan Ma ,  Qiangqiang Wang ,  Long Du ,  Wei Li

IPC: G01V5/00

CPC classification number: G01V5/0066 ,  B66C13/16 ,  B66C19/002 ,  G01V5/0008

Abstract: The present application relates to a container inspection system, comprising a radiation source (31), a radiation detection apparatus and a quay crane for hoisting a container onto an automated guided vehicle, said radiation source (31) and said radiation detection apparatus being provided on said quay crane, for performing a scanning inspection on said container loaded on said vehicle. The present application, which does not need a special allocation of approach of the radiation source and the radiation detection apparatus, conveniently effectuates scanning inspection of a container, and improving the inspection efficiency.

公开(公告)号：US20180059036A1

公开(公告)日：2018-03-01

申请号：US15691748

申请日：2017-08-31

Applicant: NUCTECH COMPANY LIMITED

Inventor： Zhiqiang Chen ,  Yuanjing Li ,  Shangmin Sun ,  Yu Hu ,  Yuan Ma ,  Qiangqiang Wang ,  Long Du ,  Wei Li

IPC: G01N23/04 ,  G05D1/00

CPC classification number: G01N23/04 ,  G01V5/0066 ,  G05D1/0094 ,  G05D2201/0207

Abstract: This invention relates to a movable divided inspection system and method, wherein the scanning inspection system comprises a first radiation source, a first detection means, a first automated guided vehicle and a second automated guided vehicle. The first radiation source is mounted on the first automated guided vehicle. The first detection means is mounted on the second automated guided vehicle. The first automated guided vehicle and the second automated guided vehicle are able to drive the first radiation source and the first detection means to a preset scan inspection position, so as to form a scanning passage for passage of an article to be scanned between the first and second automated guided vehicle, such that scanning inspection of said article to be scanned is realized by relative movement of said article to be scanned with reference to said first automated guided vehicle and said second automated guided vehicle.

公开(公告)号：US10694616B2

公开(公告)日：2020-06-23

申请号：US16667849

申请日：2019-10-29

Applicant: NUCTECH COMPANY LIMITED

Inventor： Jinsheng Liu ,  Yaohong Liu ,  Wei Jia ,  Xinshui Yan ,  Wei Li

IPC: H01J7/44 ,  H05H7/02 ,  H02H9/02 ,  H03K7/08 ,  H01J37/248

Abstract: The present disclosure provides a filament power supply for an electron accelerator and an electron accelerator. The filament power supply includes: a rectifier circuit configured to convert a power frequency AC voltage signal into a DC voltage signal; an inverter circuit configured to convert the DC voltage signal into an AC voltage signal; a sampling circuit configured to sample the AC voltage signal to obtain a current sampling signal or a voltage sampling signal; a pulse width modulation control chip configured to adjust a pulse width modulation signal until a voltage of the current sampling signal is equal to that of a reference current signal, or a voltage of the voltage sampling signal is equal to that of a reference voltage signal; a modulation circuit configured to modulate the power frequency AC voltage signal to obtain a modulation signal and output the pulse width modulation signal and the modulation signal.

公开(公告)号：US10365397B2

公开(公告)日：2019-07-30

申请号：US15691747

申请日：2017-08-31

Applicant: NUCTECH COMPANY LIMITED

Inventor： Zhiqiang Chen ,  Yuanjing Li ,  Shangmin Sun ,  Yu Hu ,  Yuan Ma ,  Qiangqiang Wang ,  Long Du ,  Wei Li

IPC: G01V5/00 ,  B66C13/16 ,  B66C19/00

Abstract: The present application relates to a container inspection system, comprising a radiation source (31), a radiation detection apparatus and a quay crane for hoisting a container onto an automated guided vehicle, said radiation source (31) and said radiation detection apparatus being provided on said quay crane, for performing a scanning inspection on said container loaded on said vehicle. The present application, which does not need a special allocation of approach of the radiation source and the radiation detection apparatus, conveniently effectuates scanning inspection of a container, and improving the inspection efficiency.