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公开(公告)号：US10663429B2
公开(公告)日：2020-05-26
申请号：US16235340
申请日：2018-12-28
Applicant: Nuctech Company Limited , TSINGHUA UNIVERSITY
Inventor： Qingjun Zhang , Yuanjing Li , Zhiqiang Chen , Ziran Zhao , Yinong Liu , Yaohong Liu , Ge Li , Jingli Xie , Qiufeng Ma , Biao Cao
Abstract: The present disclosure provides a device for collecting semi-volatile or non-volatile substance, including an air nozzle, a front cavity and a collecting body. The air nozzle is configured to eject air to a sample attachment surface. The front cavity has an upper port. The collecting body is sealingly connected to a lower end of the front cavity, inside of which is provided with a cylindrical cavity and a conical cavity arranged vertically coaxially, and bottom of which is provided with a sample outlet. The collecting body is provided with an air intake passage which is non-coplanar with respect to an axis of the cylindrical cavity and is disposed obliquely downward and inward. The collecting body is further provided with an air exhaust passage one end of which is a discharge port connected to the interior of the cylindrical cavity, the other end is connected to an air pump.
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公开(公告)号：US10578765B2
公开(公告)日：2020-03-03
申请号：US16253221
申请日：2019-01-22
Applicant: NUCTECH COMPANY LIMITED , TSINGHUA UNIVERSITY
Inventor： Kejun Kang , Yaohong Liu , Ziran Zhao , Wei Jia , Jianping Gu , Chuanxiang Tang , Huaibi Chen , Jianjun Gao , Wei Yin , Xiying Liu
Abstract: This invention provides a scan method, scan system and radiation scan controller, and relates to the field of radiation. The scanning method includes obtaining detection data of an object to be inspected under radiation scanning using a detector, adjusting an accelerator output beam dose rate and/or an output electron beam energy level of a radiation emission device according to the detection data. With this method, working conditions of the accelerator of the radiation emission device may be adjusted according to the detection data detected by the detector, so that for a region having a larger mass thickness, a higher output beam dose rate or a higher electron beam output energy level is adopted to guarantee satisfied imaging technical indexes, for a region having a smaller mass thickness, a lower output beam dose rate or a lower electron beam output energy level is adopted to reduce the environmental dose level while guaranteeing satisfied imaging technical indexes.
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公开(公告)号：US10408804B2
公开(公告)日：2019-09-10
申请号：US15276595
申请日：2016-09-26
Applicant: TSINGHUA UNIVERSITY , NUCTECH COMPANY LIMITED
Inventor： Qingjun Zhang , Yuanjing Li , Zhiqiang Chen , Ziran Zhao , Weiping Zhu , Yaohong Liu , Qiufeng Ma , Xiang Zou , Huishao He , Jianping Chang , Song Liang
IPC: G01N30/72 , G01N23/085 , G01B15/00 , G01N30/84
Abstract: A darkroom type security inspection apparatus and a method of performing an inspection using the darkroom type security inspection apparatus. An apparatus includes a housing constituting a closed darkroom, and assemblies disposed inside the housing. The assemblies disposed inside the housing include: a sample collecting unit configured to collect a sample, a conveyor unit, and a X-ray detection unit to detect a position of the objected to be inspected, wherein the X-ray detection unit is configured to determine the position of the objected to be inspected within the sampling assembly so that the object to be inspected together with the conveyor unit is conveyed to an expected position; and a sample processing assembly, wherein the assemblies disposed inside the housing are communicated by fittings or connectors.
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74.发明授权公开(公告)号：US10379252B2
公开(公告)日：2019-08-13
申请号：US15217787
申请日：2016-07-22
Applicant: Tsinghua University , NUCTECH COMPANY LIMITED
Inventor： Zhiqiang Chen , Yuanjing Li , Li Zhang , Ziran Zhao , Yaohong Liu , Juan Zheng , Jianping Gu , Chunguang Zong
IPC: G01V5/00 , G01N23/04 , G01N23/046 , G01N23/06 , G01N23/083 , G01N23/087 , G01N23/10 , G01V5/12
Abstract: Disclosed is a method and device for estimating weight of an object to be inspected in an inspection system. An effective atomic number and a high-energy gray value of the dual-energy corresponding to each pixel of the object to be inspected are obtained by a dual-energy radiation scanning. A mass-thickness value for a corresponding pixel is obtained from a pre-created mass-thickness attenuation curve by utilizing the effective atomic numbers and the high-energy gray value of the dual-energy for respective pixels. Weight information for at least a part of the object to be inspected is calculated by multiplying the mass-thickness value by the area of the pixel. Such a method may accurately calculate the weight of the object to be inspected and save the cost for a conventional weighing hardware.
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公开(公告)号：US20190234904A1
公开(公告)日：2019-08-01
申请号：US16376983
申请日：2019-04-05
Applicant: Nuctech Company Limited
Inventor： Qingjun Zhang , Yuanjing Li , Zhiqiang Chen , Ziran Zhao , Yinong Liu , Yaohong Liu , Huishao He , Qiufeng Ma , Weiping Zhu , Xiang Zou , Jianping Chang , Song Liang
Abstract: A detection apparatus and a detection method are disclosed. In one aspect, the detection apparatus includes a sampling device for collecting samples to be checked. It further includes a sample pre-processing device configured to pre-process the sample from the sampling device. It further includes a sample analyzing device for separating samples from the pre-processing device and for analyzing the separated samples. The detection apparatus is miniaturized and highly precise, and is capable of quickly and accurately detecting gaseous phase or particulate substances, and it has applications for safety inspections at airports, ports, and subway stations.
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Patent Agency Ranking
公开(公告)号：US10340783B2
公开(公告)日：2019-07-02
申请号：US14008921
申请日：2012-12-28
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Yaohong Liu , Chuanxiang Tang , Xinshui Yan , Wei Jia , Jianjun Gao , Jinsheng Liu , Wei Yin , Xiying Liu , Hao Shi
Abstract: The present invention provides a pulse modulating power source, which comprises: a plurality of discharging modules connected in series during discharging; a plurality of triggers corresponding to said plurality of discharging modules, wherein each trigger provides a trigger signal to the corresponding discharging module to turn it on; a control logic module for controlling the trigger signals so as to turn on said plurality of discharging modules successively with a time delay; an output terminal for outputting a voltage.
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公开(公告)号：US10289699B2
公开(公告)日：2019-05-14
申请号：US15282134
申请日：2016-09-30
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Zhiqiang Chen , Li Zhang , Ziran Zhao , Yaohong Liu , Jianping Gu , Zheng Hu , Qiang Li
Abstract: A vehicle inspection method and system are disclosed. In one aspect, the method includes acquiring a transmission image of an inspected vehicle. The method further includes acquiring a transmission image template of a vehicle model corresponding to the model of the inspected vehicle from a database. The method further includes performing registration on the transmission image of the inspected vehicle and the transmission image template. The method further includes determining a difference between a transmission image after the registration and a transmission image template after the registration, to obtain a difference area of the transmission image of the vehicle relative to the transmission image template. The method further includes processing the difference area to determine whether the vehicle carries a suspicious object or not. In some embodiments, this solution can avoid the problems of a detection loophole and a poor effect of manually determining an image in a conventional manner, and is important to assist the security inspection for small vehicles.
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公开(公告)号：US10281432B2
公开(公告)日：2019-05-07
申请号：US15280744
申请日：2016-09-29
Applicant: Nuctech Company Limited
Inventor： Qingjun Zhang , Yuanjing Li , Zhiqiang Chen , Ziran Zhao , Yinong Liu , Yaohong Liu , Huishao He , Qiufeng Ma , Weiping Zhu , Xiang Zou , Jianping Chang , Song Liang
IPC: H01J49/00 , G01N27/62 , H01J49/04 , G01N1/02 , G01N1/22 , G01N1/40 , G01N30/60 , G01N30/72 , G01N1/42
Abstract: A detection apparatus and a detection method are disclosed. In one aspect, the detection apparatus includes a sampling device for collecting samples to be checked. It further includes a sample pre-processing device configured to pre-process the sample from the sampling device. It further includes a sample analyzing device for separating samples from the pre-processing device and for analyzing the separated samples. The detection apparatus is miniaturized and highly precise, and is capable of quickly and accurately detecting gaseous phase or particulate substances, and it has applications for safety inspections at airports, ports, and subway stations.
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公开(公告)号：US20190090336A1
公开(公告)日：2019-03-21
申请号：US16117267
申请日：2018-08-30
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Yaohong Liu , Ziran Zhao , Jinsheng Liu , Huaibi Chen , Liang Zhang , Dongsheng Zhang
IPC: H05G1/02
Abstract: The disclosed technology relates to an X-ray conversion target. In one aspect, the X-ray conversion target includes target body and a target part arranged within the target body, the target part having a first face configured to produce X-rays. The X-ray conversion target further comprises a cooling passage having a side wall, at least a part of the side wall being consisted of a portion of the target part.
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公开(公告)号：US10152774B2
公开(公告)日：2018-12-11
申请号：US15217613
申请日：2016-07-22
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Kejun Kang , Zhiqiang Chen , Yuanjing Li , Li Zhang , Ziran Zhao , Yaohong Liu , Jianping Gu , Zhiming Wang
Abstract: The present disclosure relates to a method and device for estimating a point spread function. In one implementation, a method includes capturing, by a scanning device, an image by scanning a plurality of rectangle blocks which are same sized and closely arranged, wherein the plurality of rectangle blocks are made of different materials and/or have different mass thicknesses, and an incident direction of rays is perpendicular to a scanning direction and a surface of the plurality of rectangle blocks arranged closely during scanning; obtaining line spread functions for two directions along a length side and a width side of each of the rectangle blocks based on the scanned image, and obtaining standard deviation parameters of the line spread functions; and combining the standard deviation parameters for the two directions to obtain a two dimensional Point Spread Function (PSF) parameter so as to estimate the point spread function.
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