公开(公告)号：US20190193691A1

公开(公告)日：2019-06-27

申请号：US16233398

申请日：2018-12-27

Applicant: TSINGHUA UNIVERSITY ,  Nuctech Company Limited

Inventor： Yuan HE ,  Jianmin LI ,  Hongqi LI ,  Yulan LI ,  Qiangqiang WANG ,  Yuanjing LI ,  Zhiqiang CHEN ,  Li ZHANG

IPC: B60S13/00

CPC classification number: B60S13/00 ,  B60S5/00 ,  B62D49/02 ,  B62D49/0692

Abstract: A fork-arm lift tractor includes a vehicle body, a supporting plate disposed above the vehicle body, a lifting device for driving the supporting plate to be lifted, a front and rear fork-arm assemblies, a front and rear fork-arm drive assemblies. The front fork-arm assembly includes two front fork-arms rotatably disposed at the supporting plate. The rear fork-arm assembly includes two rear fork-arms rotatably disposed at the supporting plate, and the front and rear fork-arms may be deployed or retracted from both sides of the supporting plate. The front fork-arm driving assembly includes a front transmission part, and a front power device disposed at the supporting plate and may drive the front transmission part to move horizontally linearly so as to rotate the two front fork-arms. The rear fork-arm driving assembly has almost the same structure of the front fork-arm driving assembly and is used to rotate the two rear fork-arms.

公开(公告)号：US20180075938A1

公开(公告)日：2018-03-15

申请号：US15802473

申请日：2017-11-03

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Li ZHANG ,  Mingzhi HONG ,  Qingping HUANG ,  Le SHEN

IPC: G21K1/06 ,  G02B5/18

CPC classification number: G21K1/06 ,  G02B5/1838 ,  G21K1/025 ,  G21K2201/067 ,  G21K2207/005

Abstract: The disclosure relates to a grating and a radiation imaging device. The grating comprises a plurality of stacked grating elements. The grating elements are stacked to form a grid. The grating element comprises a first sheet and a second sheet having two parallel planes. The second sheet is stacked at the first sheet in a length direction of the first sheet. The first sheet is almost impervious to radiation. The present disclosure stacks the sheets having different specifications together to form the grating with uniform grating slits, such that there is no limitation on the thickness of the grating and the grating can be used along with high-energy radiations.

公开(公告)号：US20180038798A1

公开(公告)日：2018-02-08

申请号：US15613265

申请日：2017-06-05

Applicant: Nuctech Company Limited

Inventor： Li ZHANG ,  Ziran ZHAO ,  Jianhong ZHANG ,  Hongqiu WANG ,  Yubo ZHANG ,  Haihui LIU

IPC: G01N21/65 ,  G01J3/02 ,  G01J3/44

CPC classification number: G01N21/65 ,  G01J3/0208 ,  G01J3/021 ,  G01J3/0218 ,  G01J3/0221 ,  G01J3/0227 ,  G01J3/0256 ,  G01J3/44 ,  G01J2003/1213 ,  G01N2201/0221 ,  G01N2201/06113 ,  G01N2201/08 ,  G01N2201/0833

Abstract: The disclosure provides a portable Raman device that includes a laser for emitting exciting light; a spectrometer for receiving Raman scattered light and converting the Raman scattered light into an electrical signal after beam splitting; a probe for leading the exciting light to irradiate on a sample and collect the Raman scattered light of the sample; and a fiber system connected between the laser and the probe as well as between the probe and the spectrometer so as to conduct light transmission. In comparison to conventional Raman devices, the portable Raman device of the disclosure has a simplified optical system, such that placement of components of the Raman device are more flexible, the whole size of the Raman device are reduced, and thus requirements of size miniaturization and quick real-time measurement are satisfied.

公开(公告)号：US20170309043A1

公开(公告)日：2017-10-26

申请号：US15129455

申请日：2015-12-23

Applicant: Tsinghua University ,  NUCTECH COMPANY LIMITED

Inventor： Liang LI ,  Zhiqiang CHEN ,  Kejun KANG ,  Li ZHANG ,  Ziran ZHAO ,  Yuxiang XING ,  Yongshun XIAO ,  Jianping GU ,  Juan ZHENG

IPC: G06T11/00 ,  G06T7/00

CPC classification number: G06T11/003 ,  G01N23/04 ,  G06T7/0002 ,  G06T11/008 ,  G06T2207/10081 ,  G06T2207/30112 ,  G06T2211/408

Abstract: Disclosed is a dual-energy ray imaging method and system. The method comprises: calculating the mass thicknesses of the materials in the overlapped area of two materials by using a calibrated surface fitting method, and then decomposing a pair of original high-energy and low-energy data for this pixel into two high-low-energy data sets corresponding to the two materials, and finally calculating and acquiring the composition result of different materials for each pixel. The disclosure is especially advantageous in that the problem of error recognition of materials due to the two overlapped materials can be eliminated and the stratified imaging of multiple materials can be achieved, thereby improving the accuracy of the substance recognition and reducing the rate of false positive and false negative which is very important to the applications in the field of security check and anti-smuggling.

公开(公告)号：US20170184503A1

公开(公告)日：2017-06-29

申请号：US15271297

申请日：2016-09-21

Applicant: NUCTECH COMPANY LIMITED

Inventor： Yanshi NING ,  Li ZHANG ,  Hongqiu WANG ,  Yumin YI ,  Shixin ZHANG

IPC: G01N21/65

CPC classification number: G01N21/65 ,  G01N33/0057 ,  G01N2021/651 ,  G01N2201/022 ,  G01N2201/0236

Abstract: Embodiments of the present disclosure provide a safety protection device for Raman spectroscopy detection and a Raman spectroscopy detection system including the safety protection device. The safety protection device includes: a detection cavity including a cavity body, the cavity body having an opening end through which a sample to be detected is allowed to be placed into the detection cavity; and a cover configured to cover and engage the opening end so as to form, together with the detection cavity, an explosion proof container defining a space for receiving the sample to be detected, the detection cavity further includes a detection opening formed in the cavity body such that a Raman detection probe is allowed to be inserted into the space through the detection opening so as to detect the sample.

公开(公告)号：US20150378047A1

公开(公告)日：2015-12-31

申请号：US14748407

申请日：2015-06-24

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Xin JIN ,  Qingping HUANG ,  Le SHEN ,  Yunda SUN

IPC: G01V5/00 ,  G01T7/08

CPC classification number: G01V5/0041 ,  A61B6/4266 ,  G01T1/202 ,  G01T1/362 ,  G01T7/08 ,  G01V5/005

Abstract: The present disclosure discloses a detector device comprising a plurality of detector assemblies. Each detector assembly comprises at least one detection crystal units having a first energy response and those having a second energy response, which are both arranged along a first direction at intervals, each detection crystal unit having a first/second energy response including at least one detection crystals having a first/second energy response arranged along a second direction. The at least one detection crystal units having a first energy response and the at least one detection crystal units having a second energy response are, at least partially, alternatively arranged along the first direction when viewed from an incidence direction of the X-ray. The present disclosure also discloses a dual energy CT system having the detector device and a CT detection method using this system.

Abstract translation: 本公开公开了一种包括多个检测器组件的检测器装置。 每个检测器组件包括具有第一能量响应的至少一个检测晶体单元和具有第二能量响应的检测晶体单元，它们都沿着第一方向间隔排列，每个检测晶体单元具有包括至少一个检测的第一/第二能量响应 具有沿第二方向布置的第一/第二能量响应的晶体。 当从X射线的入射方向观察时，具有第一能量响应的至少一个检测晶体单元和具有第二能量响应的至少一个检测晶体单元至少部分地沿第一方向布置。 本公开还公开了一种具有检测器装置和使用该系统的CT检测方法的双能CT系统。

公开(公告)号：US20140093152A1

公开(公告)日：2014-04-03

申请号：US14037236

申请日：2013-09-25

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Liang LI ,  Li ZHANG ,  Zhiqiang CHEN ,  Ziran ZHAO ,  Yuxiang XING ,  Yongshun XIAO ,  Qingli WANG

IPC: G06T7/00

CPC classification number: G06T7/004 ,  A61B6/4085 ,  A61B6/466 ,  A61B6/469 ,  A61B6/5258 ,  G06T7/0012 ,  G06T7/55 ,  G06T7/70 ,  G06T11/006 ,  G06T2211/421 ,  G06T2211/436 ,  G16H40/63

Abstract: The present disclosure provides methods and devices for locating a plurality of interested objects in CT imaging. Location of the interested objects in the three-dimensional space can be determined by using three projection images that are substantially perpendicular to each other. The method can rapidly locate interested objects in a CT image without pre-reconstruction of the CT image even if there are a plurality of interested objects in the field of view. The algorithm does not involve interactive steps. The method is rapid and effective, and thus applicable to industrial applications.

Abstract translation: 本公开提供了用于在CT成像中定位多个感兴趣对象的方法和装置。 可以通过使用基本上彼此垂直的三个投影图像来确定兴趣对象在三维空间中的位置。 即使在视野中存在多个感兴趣的对象，该方法也可以快速定位CT图像中的感兴趣的对象，而无需对CT图像进行预重建。 该算法不涉及交互式步骤。 该方法快速有效，适用于工业应用。

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：US20240319113A1

公开(公告)日：2024-09-26

申请号：US18574706

申请日：2022-07-04

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Li ZHANG ,  Yunda SUN ,  Xin JIN ,  Wuyang LIANG ,  Zhenhua ZHAO ,  Kemin HU

IPC: G01N23/04 ,  A61B6/00

CPC classification number: G01N23/04 ,  A61B6/52 ,  G01N2223/401

Abstract: A digital radiography system and a digital radiography method. The digital radiography system includes: detectors (L) mounted on a plurality of detector arm supports (L1, L2) formed in a first plane (P); and a ray source (S) that is non-coplanar with the first plane (P). The digital radiography system further includes an image processing apparatus (10).

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.