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公开(公告)号：US20250108979A1
公开(公告)日：2025-04-03
申请号：US18834382
申请日：2023-12-25
Applicant: NUCTECH COMPANY LIMITED , Tsinghua University
Inventor： Zhiqiang CHEN , Li ZHANG , Liang LI , Mingzhi HONG , Zinan WANG , Lei XIE , Ming CHANG
Abstract: An inspection system includes a conveying mechanism, a pushing mechanism, a positioning mechanism and an inspection mechanism. The conveying mechanism is configured to convey an object to be inspected. The pushing mechanism is suitable for pushing the object to be inspected in a conveying direction of the conveying mechanism, so as to push the object to be inspected to a first positioning plane and a second positioning plane. The positioning mechanism includes a positioning portion. The positioning portion may move in the conveying direction of the conveying mechanism, so as to define the first positioning plane and the second positioning plane. The object to be inspected abuts against the positioning portion on the first positioning plane and the second positioning plane. The inspection mechanism is suitable for inspecting the object to be inspected when the object to be inspected is located on the first positioning plane and the second positioning plane.
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公开(公告)号：US20250099045A1
公开(公告)日：2025-03-27
申请号：US18832490
申请日：2023-12-25
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Zhiqiang CHEN , Li ZHANG , Liang LI , Mingzhi HONG , Zinan WANG , Yongjie XIA , Ming Chang
Abstract: The present disclosure provides a CT imaging system and a CT detection device. The CT imaging system includes: a connecting plate, a strong supporting frame, a weak supporting frame, an emitter, a detector, an electrical component and a shielding box. The connecting plate is annular and has a rotating axis. The strong supporting frame is connected to the connecting plate on a side of the connecting plate and includes a first strong supporting frame and a second strong supporting frame distributed at an interval in a circumferential direction of the connecting plate. The weak supporting frame is connected to the connecting plate on a same side of the connecting plate as the strong supporting frame. The emitter is connected to the first strong supporting frame. The detector is connected to the second strong supporting frame. The electrical component is connected to the weak supporting frame. The shielding box is connected to at least one weak supporting frame.
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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
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.
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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。
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公开(公告)号：US20210082221A1
公开(公告)日：2021-03-18
申请号：US17017967
申请日：2020-09-11
Applicant: NUCTECH COMPANY LIMITED , Tsinghua University
Inventor： Li ZHANG , Gang PENG , Qingping HUANG , Liang LI , Fan YANG , Jiabao CHEN , Kun CHENG , Zhifeng HE
Abstract: The present disclosure provides a smart lock, including: a lock body and an unlocking structure; a Bluetooth communication module configured to receive a lock instruction or an unlock instruction based on Bluetooth communication; and one or more binding tags, each binding tag being associated with a Bluetooth address of the smart lock, wherein the unlocking structure is configured to lock or unlock the smart lock based on the lock instruction or the unlock instruction, or lock or unlock the smart lock based on an operation performed for the one or more binding tags. The present disclosure further provides a system and method for monitoring an object equipped with the smart lock.
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Patent Agency Ranking
公开(公告)号：US20190204243A1
公开(公告)日：2019-07-04
申请号：US16234625
申请日：2018-12-28
Applicant: TSINGHUA UNIVERSITY , NUCTECH COMPANY LIMITED
Inventor： 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: G01N23/046
CPC classification number: G01N23/046 , G01N2223/33 , G01V5/005
Abstract: 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.
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公开(公告)号：US20190086562A1
公开(公告)日：2019-03-21
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
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.
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公开(公告)号：US20190056338A1
公开(公告)日：2019-02-21
申请号：US16045243
申请日：2018-07-25
Applicant: Tsinghua University , NUCTECH COMPANY LIMITED
Inventor： Liang LI , Zhiqiang CHEN , Li ZHANG , Ziran ZHAO , Yuxiang XING , Siyuan ZHANG
IPC: G01N23/2206 , G01N23/046 , G01N23/223 , A61B6/03 , A61B6/06 , A61B6/10 , A61B6/00
Abstract: The present disclosure discloses a ray transmission and fluorescence CT imaging system and method. The system comprises: a ray source configured to emit a beam of rays; a rotational scanning device configured to perform rotational CT scanning on an object to be inspected; a transmission CT detector configured to receive the beam of rays which has passed through the object; a fluorescence CT detector configured to receive fluorescent photons excited by irradiation of the beam of rays on the object; a data acquisition unit configured to acquire a transmission data signal and a fluorescence data signal respectively; and a control and data processing unit configured to control the ray source to emit the beam of rays, control the rotational scanning device to perform the rotational CT scanning, and obtain a transmission CT image and a fluorescence CT image simultaneously based on the transmission data signal and the fluorescence data signal.
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9.发明申请公开(公告)号：US20180328866A1
公开(公告)日：2018-11-15
申请号：US16029896
申请日：2018-07-09
Applicant: Nuctech Company Limited
Inventor： Kejun KANG , Zhiqiang CHEN , Yuanjing LI , Li ZHANG , Ziran ZHAO , Yaohong LIU , Jianping GU , Liang LI , Yuxiang XING
IPC: G01N23/046 , G01V5/00
CPC classification number: G01N23/046 , G01V5/005
Abstract: The present disclosure provides a low-angle self-swinging type computed tomography (CT) apparatus, which is provided with an X-ray accelerator and a plurality of rows of detectors and is configured to include a slip ring, such that the slip ring with the accelerator and the detectors thereon is capable of performing a single-pendulum reciprocating movement while an objected to be inspected passes through the slip ring, a three dimension CT image of the object is displayed, thereby achieving accurate inspection for large-scale objects, such as van containers.
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10.发明申请LOW-ANGLE SELF-SWINGING, LARGE-SCALE MULTI-SLICE SPIRAL COMPUTED TOMOGRAPHY APPARATUS AND INSPECTION METHOD 审中-公开低角度自动扫描，大规模多层螺旋计算机图像检测和检测方法公开(公告)号：US20160084775A1
公开(公告)日：2016-03-24
申请号：US14837205
申请日：2015-08-27
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Kejun KANG , Zhiqiang CHEN , Yuanjing LI , Li ZHANG , Ziran ZHAO , Yaohong LIU , Jianping GU , Liang LI , Yuxiang XING
IPC: G01N23/04
CPC classification number: G01N23/046 , G01V5/005
Abstract: The present disclosure provides a low-angle self-swinging type computed tomography (CT) apparatus, which is provided with an X-ray accelerator and a plurality of rows of detectors and is configured to include a slip ring, such that the slip ring with the accelerator and the detectors thereon is capable of performing a single-pendulum reciprocating movement while an objected to be inspected passes through the slip ring, a three dimension CT image of the object is displayed, thereby achieving accurate inspection for large-scale objects, such as van containers.
Abstract translation: 本公开提供了一种低角度自摆式计算机断层摄影（CT）装置，其设置有X射线加速器和多排检测器，并且构造成包括滑环，使得滑环具有 加速器和其上的检测器能够在被检查对象通过滑环的同时执行单摆往复运动，显示对象的三维CT图像，从而实现对大型物体的精确检查，例如 作为集装箱。
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