公开(公告)号：US20140320855A1

公开(公告)日：2014-10-30

申请号：US14145454

申请日：2013-12-31

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Jianhong ZHANG ,  Hongqiu WANG ,  Ziran ZHAO ,  Jianping GU ,  Zhiming WANG ,  Qingping HUANG ,  Yumin YI

IPC: G01N21/65

CPC classification number: G01N21/65

Abstract: A raman spectroscopy method of measuring melamine contents in dairy products having different matrixes. The method includes: (a) establishing a database of characteristic curves of dairy products having different matrixes; (b) taking several copies of the dairy products having one certain unknown matrix and adding melamine standard solutions having different concentrations therein, to obtain a series of dairy product samples in which the relative concentrations of the melamine are known; (c) performing raman spectrum testing analysis and obtaining corresponding characteristic peak intensities to obtain a slope of the characteristic curve showing variation of the characteristic peak intensities with the relative concentrations of the melamine; (d) searching the database of step (a) using the slope of the characteristic curve of the dairy product samples to find a matching characteristic curve, and (e) calculating concentration of melamine in the dairy products by using the matched characteristic curve and the characteristic peak intensity.

Abstract translation: 测量具有不同基质的乳制品中三聚氰胺含量的拉曼光谱法。 该方法包括：（a）建立具有不同矩阵的乳制品特征曲线数据库; （b）取几份具有一定未知基质的乳制品，并加入其中浓度不同的三聚氰胺标准溶液，以获得其中已知三聚氰胺的相对浓度的一系列乳制品样品; （c）进行拉曼光谱测试分析并获得相应的特征峰强度，以获得特征曲线的斜率，显示特征峰强度与三聚氰胺的相对浓度的变化; （d）使用奶制品样本的特征曲线的斜率来搜索步骤（a）的数据库，以找到匹配的特征曲线，以及（e）通过使用匹配的特征曲线计算乳制品中三聚氰胺的浓度， 特征峰强度。

公开(公告)号：US20240345005A1

公开(公告)日：2024-10-17

申请号：US18575673

申请日：2022-07-06

Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

Inventor： Li ZHANG ,  Zhiqiang CHEN ,  Qingping HUANG ,  Hui DING ,  Yong ZHOU ,  Xin JIN ,  Liming YAO

IPC: G01N23/10 ,  G01N23/046 ,  G01N23/083

CPC classification number: G01N23/10 ,  G01N23/046 ,  G01N23/083 ,  G01N2223/204 ,  G01N2223/3303 ,  G01N2223/401 ,  G01N2223/643

Abstract: An inspection system and method, the inspection system includes: a carrying device, at least one ray source, where each ray source includes a separate housing to define a vacuum space and a plurality of target spots enclosed within the housing; and a detector assembly. The at least one ray source and the detector assembly are lifted or lowered along a central axis of the carrying device relative to the carrying device. When viewed along the central axis, the ray source is translatable between scanning positions relative to the carrying device. When the ray source is at one of the scanning positions, the ray source and the detector assembly are lifted or lowered along the central axis, and the ray source emits X-rays; and when the ray source and the detector assembly are lifted or lowered a predetermined distance, the ray source translates to another one of the scanning positions.

公开(公告)号：US20240310305A1

公开(公告)日：2024-09-19

申请号：US18575577

申请日：2022-07-06

Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Qingping HUANG ,  Yong ZHOU ,  Hui DING ,  Xin JIN ,  Chao JI

IPC: G01N23/10 ,  G01N23/046 ,  G01N23/083

CPC classification number: G01N23/10 ,  G01N23/046 ,  G01N23/083 ,  G01N2223/204 ,  G01N2223/33 ,  G01N2223/50 ,  G01N2223/643

Abstract: An inspection system and method, and the system includes: a ray source; a detector assembly; and a conveying device for carrying an aviation pallet cargo. The ray source and the detector assembly are movable in a traveling direction parallel to the central axis relative to the conveying device so that the aviation pallet cargo enters an inspection region, the ray source is translatable between a plurality of scanning positions, and a translation distance of the ray source between two adjacent scanning positions is greater than a spacing between adjacent target spots of the ray source. When the ray source is located at one of the scanning positions, the ray source and the detector assembly move in the traveling direction and the ray source emits X-rays; and when the ray source and the detector assembly move a predetermined distance in the traveling direction, the ray source translates to another one of the plurality of scanning positions.

公开(公告)号：US20240248049A1

公开(公告)日：2024-07-25

申请号：US18575795

申请日：2022-07-07

Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Qingping HUANG ,  Yong ZHOU ,  Zhenhua ZHAO ,  Hui DING ,  Xin JIN ,  Chao JI

IPC: G01N23/046

CPC classification number: G01N23/046 ,  G01N2223/3308 ,  G01N2223/401 ,  G01N2223/419 ,  G01N2223/5015

Abstract: Embodiments of the present application provides a ray scanning apparatus, which includes: a conveying device for conveying an object under inspection to pass through a scanning region of the ray scanning apparatus; a ray source assembly including a plurality of ray source modules, each of the ray source modules including at least one ray source point emitting a ray beam; and a detector assembly for detecting rays transmitting through the object under inspection during scanning and including a plurality of detector sets.

公开(公告)号：US20240219325A1

公开(公告)日：2024-07-04

申请号：US18574653

申请日：2022-07-06

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Li ZHANG ,  Zhiqiang CHEN ,  Qingping HUANG ,  Hui DING ,  Yong ZHOU ,  Xin JIN ,  Liming Yao

IPC: G01N23/10 ,  G01N23/046 ,  G01N23/083

CPC classification number: G01N23/10 ,  G01N23/046 ,  G01N23/083 ,  G01N2223/3303 ,  G01N2223/643

Abstract: Provided are an inspection system and an inspection method, the inspection system includes: a carrying device (300); at least one ray source (100) each includes a separate housing (110) to define a vacuum space and target spots enclosed within the housing (110), and a detector assembly (200). The at least one ray source (100) is rotatable between a plurality of scanning positions around a rotation axis relative to the carrying device (300). The at least one ray source (100) and the detector assembly (200) may be lifted or lowered along the rotation axis relative to the carrying device (300). When the at least one ray source (100) is located at one of scanning positions relative to the carrying device (300), the at least one ray source (100) and the detector assembly (200) are lifted or lowered along the rotation axis relative to the carrying device (300) and the at least one ray source (100) emits X-rays. After the at least one ray source (100) and the detector assembly (200) are lifted or lowered a predetermined distance relative to the carrying device (300), the at least one ray source (100) rotates around the rotation axis relative to the carrying device (300) to another one of scanning positions.

公开(公告)号：US20240212336A1

公开(公告)日：2024-06-27

申请号：US18293704

申请日：2022-07-08

Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Yunda SUN ,  Juan ZHENG ,  Lu WANG ,  Tao YANG ,  Dong LI

IPC: G06V10/84 ,  G06T3/40 ,  G06T11/00 ,  G06V10/44 ,  G06V10/48

CPC classification number: G06V10/84 ,  G06T3/40 ,  G06T11/006 ,  G06V10/457 ,  G06V10/48 ,  G06T2211/428 ,  G06T2211/441 ,  G06V2201/05 ,  G06V2201/07 ,  G06V2201/12

Abstract: A method and an apparatus of identifying at least one target object for a security inspection CT are provided. The method includes: performing a dimension reduction on three-dimensional CT data to generate a plurality of two-dimensional dimension-reduced views (S10); performing a target identification on a plurality of two-dimensional views to obtain a set of two-dimensional semantic descriptions of the at least one target object, where the plurality of two-dimensional views include the plurality of two-dimensional dimension-reduced views (S20); and performing a dimension increase on the set of two-dimensional semantic descriptions to obtain a three-dimensional recognition result of the at least one target object (S30).

公开(公告)号：US20240159694A1

公开(公告)日：2024-05-16

申请号：US18284502

申请日：2022-01-11

Applicant: Tsinghua University ,  NUCTECH COMPANY LIMITED

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Yi CHENG ,  Qingping HUANG ,  Mingzhi HONG ,  Minghua QIU ,  Yao ZHANG ,  Jianxue YANG ,  Lei ZHENG

IPC: G01N23/083 ,  G21F7/06

CPC classification number: G01N23/083 ,  G21F7/06 ,  G01N2223/1016

Abstract: A radiographic inspection device and a method of inspecting an object are provided. The radiographic inspection device includes a support frame, where an inspection space applicable to inspect an object is formed within the support frame, and the inspection space has a first opening connecting to an outside; a transfer mechanism applicable to carry the object to move through the inspection space; a shielding curtain mounted at the first opening; and a driving mechanism mounted on the support frame and configured to drive the shielding curtain to move, so as to open or close the first opening. Since the driving mechanism drives the shielding curtain to rise or fall, it is possible to ensure that the lightweight object for inspection may smoothly enter the inspection space for subsequent radiographic scanning.

公开(公告)号：US20240151661A1

公开(公告)日：2024-05-09

申请号：US18284119

申请日：2022-01-14

Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

Inventor： Li ZHANG ,  Zhiqiang CHEN ,  Qingping HUANG ,  Mingzhi HONG ,  Yi CHENG ,  Minghua QIU ,  Yao ZHANG ,  Jianxue YANG ,  Lei ZHENG

IPC: G01N23/10

CPC classification number: G01N23/10 ,  G01N2223/301 ,  G01N2223/321 ,  G01N2223/3303

Abstract: A radiographic inspection apparatus and a vehicle-mounted security inspection system. The radiographic inspection apparatus includes a scanning device, where the scanning device includes: an upright framework; a slip ring rotatably provided on the upright framework; and a locking mechanism. The locking mechanism includes: a driving mechanism provided on the upright framework; and a contact portion provided on the driving mechanism to come into contact with an outer ring of the slip ring under a driving of the driving mechanism, so as to prevent the slip ring from rotating relative to the upright framework.

公开(公告)号：US20240092584A1

公开(公告)日：2024-03-21

申请号：US18255072

申请日：2021-11-22

Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Li ZHANG ,  Zhiqiang CHEN ,  Yuanjing LI ,  Qingping HUANG ,  Weijun GUO ,  Liming YAO ,  Hui DING ,  Junhao LIU ,  Jiajia ZHOU

IPC: B65G13/10 ,  B65G13/12

CPC classification number: B65G13/10 ,  B65G13/12 ,  B65G21/2045

Abstract: A conveying device (100) and an inspection system (1000) are provided. The conveying device includes: a first support frame (1); a first conveying mechanism (2) and a second conveying mechanism (3) which are installed on the first support frame; and a switching mechanism (4) configured to selectively lift the first conveying mechanism or the second conveying mechanism in a vertical direction, such that the first conveying mechanism or the second conveying mechanism carries goods (401) and conveys the goods in a first horizontal direction or a second horizontal direction different from the first horizontal direction. The conveying device may achieve a positioning and a smooth continuous conveying of goods, and achieve a smooth conveying and a calibrated positioning of the goods in different postures.

公开(公告)号：US20230384475A1

公开(公告)日：2023-11-30

申请号：US18034349

申请日：2021-09-30

Applicant: Tsinghua University ,  NUCTECH COMPANY LIMITED

Inventor： Zhiqiang CHEN ,  Ziran ZHAO ,  Yingkang JIN ,  Xiaoyi HE ,  Mengjiao ZHAO ,  Zhimin ZHENG ,  Yihai ZHANG ,  Yaning LI ,  Xiaoxiao FENG

IPC: G01V8/00 ,  G01V8/10 ,  G01S13/88 ,  G01S13/89

CPC classification number: G01V8/005 ,  G01V8/10 ,  G01S13/887 ,  G01S13/89

Abstract: A method and a system of performing security inspection of human body based on millimeter-wave. The method includes: displaying, by a first display device, information related to a designated posture to a person to be inspected before the person enters an inspection channel defined by a millimeter-wave human body security inspection instrument, the designated posture being expected to be taken by the person when scanning the person with the instrument; guiding the person to enter the inspection channel and stand at a designated standing position within the inspection channel in a standing posture substantially complying with the designated posture; scanning, by the instrument, the person, to obtain millimeter-wave scanning data; and performing, by a workstation, a reconstruction of millimeter-wave scanning image of the person, a confirmation for the standing posture of the person, and a recognition of a suspected item of the person, based on the millimeter-wave scanning data.