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公开(公告)号：US11327198B2
公开(公告)日：2022-05-10
申请号：US16234621
申请日：2018-12-28
Applicant: TSINGHUA UNIVERSITY , NUCTECH COMPANY LIMITED
Inventor： Xiulin Ni , Jianmin Li , Haitian Tan , Yulan Li , Weifeng Yu , Yuanjing Li , Hejun Zhou , Zhiqiang Chen , Chunguang Zong , Li Zhang
IPC: G01N23/046 , G01V5/00 , A61B6/03 , A61B6/00 , G01N23/18
Abstract: The present disclosure relates to the technical field of CT detection, in particular to a CT inspection system and a CT imaging method. The CT inspection system provided by the present disclosure includes a scanning device and an imaging device, wherein the scanning device having a radioactive source device and a detection device is configured to rotate at a nonuniform speed in at least partial process of scanning an object to be detected; and the imaging device generates a CT image based on effective detection data, wherein the effective detection data refer to data acquired each time the detection device rotates by a preset angle. In the present disclosure, the imaging device of the CT inspection system generates a CT image based on data acquired each time the detection device rotates by a preset angle, which, compared with traditional image collection solutions, can effectively reduce image deformation and improve accuracy of detection results.
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公开(公告)号：US11326739B2
公开(公告)日：2022-05-10
申请号：US16373770
申请日：2019-04-03
Applicant: Nuctech Company Limited
Inventor： Hongyan Wei , Yulan Li , Jianping Chang , Haijun Yu , Xiuxia Li , Hong Li , Li He
Abstract: A cryostat includes a room temperature vessel, a low temperature vessel, and a refrigeration mechanism. The room temperature vessel includes a room temperature tank, an outer neck tube and a sealing head. The low temperature vessel includes a low temperature tank, an inner neck tube and a liquefaction chamber. The liquefaction chamber corresponds to the first opening and passes through the first opening. The refrigeration mechanism includes a device panel and a refrigeration device. The device panel is disposed on the sealing head. The refrigeration device includes a body and a cold finger. The body is disposed at the device panel. The cold finger is connected with the body and extends into the liquefaction chamber.
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公开(公告)号：US10739491B2
公开(公告)日：2020-08-11
申请号：US16232058
申请日：2018-12-26
Applicant: TSINGHUA UNIVERSITY , NUCTECH COMPANY LIMITED
Inventor： Yigang Yang , Dongyu Wang , Hao Yu , Quanwei Song , Jianmin Li , Weizhen Wang , Yulan Li , Chunguang Zong , Qinjian Zhang , Ming Zeng , Zhiqiang Chen , Yuanjing Li , Li Zhang
Abstract: The present disclosure discloses a radiation inspection system and a radiation inspection method. The radiation inspection system comprises a radiation source and a beam modulating device. The beam modulating device comprises a first collimating structure disposed at a beam exit side of the radiation source and a second collimating structure disposed at a beam exit side of the first collimating structure. The second collimating structure is movable relative to the first collimating structure to change a relative position of the first collimating port of the first collimating structure with the second collimating port of the second collimating structure, and the beam modulating device is shifted between a first operational state in which the beam modulating device modulates an initial beam into a fan beam, and a second operational state in which the beam modulating device modulates the initial beam into a pencil beam variable in position.
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公开(公告)号：US10658088B2
公开(公告)日：2020-05-19
申请号：US15277828
申请日：2016-09-27
Applicant: Tsinghua University , NUCTECH COMPANY LIMITED
Inventor： Kejun Kang , Ying Li , Jianmin Li , Yulan Li , Guoping Zhu
Abstract: A collimator and an inspection system having the collimator are disclosed. The collimator includes: a collimator body including a first part and a second part; a collimating slit formed between the first part and the second part and having a first end and a second end in a longitudinal direction thereof; and a shielding member which is movable relative to the collimator body such that both a beam divergent angle and an elevation angle of a ray beam propagating through the collimating slit are varied. An inspection system and an inspection method for scanning a vehicle are further disclosed.
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公开(公告)号：US10338236B2
公开(公告)日：2019-07-02
申请号：US15719571
申请日：2017-09-29
Applicant: NUCTECH COMPANY LIMITED , TSINGHUA UNIVERSITY
Inventor： Yuanjing Li , Ziran Zhao , Jianmin Li , Yulan Li , Weibin Zhu , Xiang Zou , Qingjun Zhang , Chunguang Zong , Xiaolin Zhao , Shuwei Li , Junxiao Wang
Abstract: This disclosure provides a radiation detection apparatus and a method, a data processing method and a processor, which relates to the field of radiation detection technology. Wherein, the radiation detection apparatus of this disclosure comprises: a radiation detector which generates an electrical signal by interacting with X-rays; an Analog-to-Digital Converter (ADC) which is coupled to the radiation detector and transmits the electrical signal to a waveform data; and a data processor which receives the waveform data from the ADC, determines the number of single photon signals according to the waveform data, and determines whether an integral signal and/or a count signal of the waveform data will be used for imaging according to the number of the single photon signals.
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Patent Agency Ranking
公开(公告)号：US10082597B2
公开(公告)日：2018-09-25
申请号：US14837211
申请日：2015-08-27
Applicant: Nuctech Company Limited
Inventor： Quanwei Song , Kejin Gao , Xuping Fan , Liwei Song , Jianmin Li , Shangmin Sun , Yulan Li , Chunguang Zong , Jinning Liang , Sheng Tang
IPC: G01V5/00
CPC classification number: G01V5/0066 , G01V5/0016
Abstract: A mobile inspection system comprises: a stand; a ray source mounted to the stand and configured to generate a ray; a substantially inverted L-shaped detector beam comprising a horizontal detector beam portion and an upright detector beam portion connected to one end of the horizontal detector beam portion; a plurality of detectors configured to receive the ray emitted from the ray source, the plurality of detectors being disposed to at least one of the horizontal detector beam portion and the upright detector beam portion; and a drive device disposed to the stand, connected with the other end of the horizontal detector beam portion, and configured to drive the detector beam to rotate around an upright axis, wherein the ray source and the detector beam rotate synchronously.
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37.发明授权公开(公告)号：US10007020B2
公开(公告)日：2018-06-26
申请号：US14970679
申请日：2015-12-16
Applicant: Nuctech Company Limited
Inventor： Jianmin Li , Ying Li , Yulan Li , Jianping Gu , Yuanjing Li , Zhiqiang Chen
CPC classification number: G01V5/0016 , G01N23/04 , G01N2223/639 , G01V5/0008 , G06K9/00624 , G06K9/52 , G06K9/6215 , G06K2209/09 , G06K2209/23 , G06T7/001 , G06T7/60 , G06T7/74 , G06T2207/10116 , G06T2207/30112 , G06T2207/30248 , G06T2207/30268
Abstract: A vehicle inspection method is disclosed, comprising steps of: implementing a ray scanning inspection on an inspected vehicle, so as to obtain a ray scanning inspection image of the inspected vehicle; extracting vehicle characteristic information; comparing the vehicle characteristic information of the inspected vehicle to vehicle reference characteristics stored in a database, selecting a closest vehicle reference characteristic which is closest to the vehicle characteristic information, and finding out a closest ray transmission reference image on the basis of a corresponding relationship between the vehicle reference characteristics and ray transmission reference images stored in the storage unit; determining a first distinguishing area of the ray scanning inspection image from the closest ray transmission reference image by comparing the ray scanning inspection image of the inspected vehicle to the closest ray transmission reference image. A vehicle inspection system is also disclosed.
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公开(公告)号：US20180172604A1
公开(公告)日：2018-06-21
申请号：US15827739
申请日：2017-11-30
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Chunguang Zong , Ying Li , Hejun Zhou , Quanwei Song , Jianmin Li , Yulan Li , Yuanjing Li , Li Zhang , Zhiqiang Chen
CPC classification number: G01N21/9081 , G01N21/01 , G01N23/04 , G01V5/0016 , G01V5/0025
Abstract: A movable ray inspection system used to be mounted in a container yard to inspect an object within a container is provided. The movable ray inspection system includes: a ray generator device configured to emit a ray, a ray receiving device configured to receive the ray, and at least one chamber for receiving the ray generator device and the ray receiving device therein. Each of the at least one chamber is configured to be a standard container or a chamber which has a same shape, a same size and a same structure as a standard container such that the movable ray inspection system is adapted to be stacked in the container yard.
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公开(公告)号：US20180074217A1
公开(公告)日：2018-03-15
申请号：US15700380
申请日：2017-09-11
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Weigang Yang , Yuanjing Li , Zhujun Zhang , Yulan Li
Abstract: A slow neutron detection device is disclosed, comprising: a first slow neutron converter and a second slow neutron converter, and a readout electrode wire set and cathode wire sets arranged between the first slow neutron converter and the second slow neutron converter. By arranging a readout circuit between the two slow neutron converters, an electron drift distance is reduced by half without changing a dimension of the detection device, and an average over-threshold probability of a signal is increased.
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公开(公告)号：US09910184B2
公开(公告)日：2018-03-06
申请号：US14965978
申请日：2015-12-11
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Jianmin Li , Yulan Li , Yuanjing Li , Hao Yu , Chunguang Zong , Jingyu Gu , Weifeng Yu , Quanwei Song , Weizhen Wang , Shangmin Sun , Yinong Liu , Junli Li , Chuanxiang Tang
CPC classification number: G01V5/0016 , G01V5/0008 , G21K1/02
Abstract: The present disclosure discloses an alignment system and an alignment method for a container or vehicle inspection system, and an inspection system. The inspection system comprises comprising an ray source, a collimator, a detector arm and a detector module mounted on a detector arm, the ray source, the collimator and the detector module are arranged to form an inspection passage, a ray beam emitted from the ray source passes through collimator and irradiates onto an inspected object, and an attenuated ray beam is collected by the detector module so as to complete inspection. The alignment system comprises a measuring module arranged to receive the ray beam emitted from the collimator and to measure the ray beam so as to determine positions and orientations of the ray source and the collimator. With the alignment method, alignment between a center point of the ray source, a central line of a detector tip and a central line of the collimator may be more accurately measured.
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