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公开(公告)号:WO2009092185A1
公开(公告)日:2009-07-30
申请号:PCT/CN2008/002016
申请日:2008-12-16
CPC classification number: G01N27/622 , H01J49/067
Abstract: An ion mobility spectrometry and its method are provided. The ion mobility spectrometry includes: an electrode; an ion source, which is adjacent to the electrode. Thereof, the said ion mobility spectrometry also includes: one focusing oriented electrode or one group of focusing oriented electrodes, which is /are founded on the side of the ion source far away from the electrode and formed funnel-shaped. The focusing oriented electrode exports the ions from the ion source; A storage region is provided on the side that the focusing oriented electrode exports the ions, used to store the ions produced by the ion source. The ion source is separated with the storage region,thus easy to exchange the ion source.
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公开(公告)号:WO2008086697A1
公开(公告)日:2008-07-24
申请号:PCT/CN2007/003723
申请日:2007-12-21
CPC classification number: G01N21/3586 , G01N21/3577 , G01N2201/1293
Abstract: A fast method for measuring vegetable oil purity using a THz time-domain spectrum includes measuring a THz time-domain spectrum of standard vegetable oil and creating a spectrum database; measuring a THz time-domain spectrum of unknown vegetable oil and analyzing its purity on the basic of the THz time-domain spectrum database of standard vegetable oil. A fast device for measuring vegetable oil purity using a THz time-domain spectrum includes a spectrum measuring device, which measures a THz time-domain wave before and after the THz pulse time-domain wave transmits through a vegetable oil sample as transmission way or measures directly a THztime-domain wave before and after the THz pulse time-domain wave reflects from the vegetable oil and a data processing device, which extracts physical parameters in the range of THz wave band on the basic of said time-domain wave.
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公开(公告)号:WO2008052411A1
公开(公告)日:2008-05-08
申请号:PCT/CN2007/002923
申请日:2007-10-11
CPC classification number: H05H15/00
Abstract: A multi-energy frequency-doubling particle accelerator and a method for accelerating particle, the accelerator comprises a pulse power producing unit for producing N pulse signals having different power, wherein N is more than or equal to 2; N microwaves power producing unit for respectively producing N microwaves having different energy based on N pulse signals on the control of a control signal; a power mixing unit having N inlets for respectively inputting corresponding microwave in N microwaves from each inlet of N inlets, and one outlet for outputting the N microwaves; a particle beam producing unit for producing N particle beams synchronically with N microwaves; and an accelerating unit for respectively accelerating N particle beams by using N microwaves.
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公开(公告)号:WO2008037133A1
公开(公告)日:2008-04-03
申请号:PCT/CN2006/003327
申请日:2006-12-07
IPC: G01N23/06
CPC classification number: G01N23/10
Abstract: A method and device for liquid article radiation security inspection is disclosed. The method comprises the following steps: acquiring the initial background information; sending radiation beams to pass through said liquid article; receiving the radiation beams that pass through the liquid article for forming the projection data from a plurality of angles; on the basis of the initial background information and the uniformity of the liquid article, computing and obtaining the radiation absorption coefficient of the liquid article by the reversion operation of the projection data from a plurality of angles; and obtaining the related information of the liquid article by comparing the said radiation absorption coefficient with the preset data.
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公开(公告)号:WO2007134513A1
公开(公告)日:2007-11-29
申请号:PCT/CN2007/000800
申请日:2007-03-13
IPC: G01N23/087
CPC classification number: G01N23/087 , G01N2223/206 , G01N2223/313 , G01N2223/423 , G01N2223/639
Abstract: An energy spectra modulating device, a method and a device of material identifying and a method of image processing for discriminating materials of large or medium object which are present in ocean shipping, air containers and the like by utilizing different energy X-rays is disclosed. The energy spectra modulating device comprises: a first energy spectra modulating unit for energy spectra modulating of a first ray having the first energy spectra; a second energy spectra modulating unit coupled with the first energy spectra modulating unit for energy spectra modulating of a second ray having the second energy spectra which differs from the first energy spectra. The present invention is employable in nondestructive inspection for large cargo containers at the customs, the harbor and the airport and otherwise.
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公开(公告)号:WO2007128216A1
公开(公告)日:2007-11-15
申请号:PCT/CN2007/001413
申请日:2007-04-27
IPC: G01N23/04 , G01N23/083 , G01T1/00
CPC classification number: G01N23/04 , G06T7/0004
Abstract: A goods safety inspection system, which is used for safety inspection of objects passing through the system. The system comprises: a mechanical conveying unit, used for carrying and conveying objects to be inspected, and defining moving tracks of objects in the system; a radiation-generating unit, used for generating radiation beams to transmit the objects; a data-collecting unit, used for collecting radiation beams transmitting the objects and transferring into transmission data; wherein, the moving tracks of objects to be inspected comprises at least two linear tracks which form an angle; the data-collecting unit comprises at least two detector arrays used for receiving radiation beams, each of which corresponds to one of the linear tracks, and the receiving plane of each detector array is parallel to its corresponding linear track; in operation, while the radiation-generating unit and the data-collecting unit are immobile, objects to be inspected are moving along their own tracks, moreover, objects to be inspected are only moving along the at least two linear tracks without any rotation.
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公开(公告)号:WO2007056922A1
公开(公告)日:2007-05-24
申请号:PCT/CN2006/002670
申请日:2006-10-11
CPC classification number: G01N23/046 , A61B6/032 , G01N2223/3303 , G01N2223/419 , G06T11/006 , G06T2211/421
Abstract: The present invention discloses a system and method for reconstructing an image by rectilinear trajectory scanning, to prevent the image resolution from reducing due to interpolations in angle direction and detector direction while rearranging data. The system includes: a projection data converter for converting the projection data scanned by rectilinear trajectory into the projection data scanned by quasi-parallel beam, a filter for achieving filtered projection data by convolution of a predetermined convolution function kernel and the projection data scanned by quasi-parallel beam, and backprojection means for reconstructing the image by applying weighted backprojection to the filtered projection data. The system and method of the present invention improves the image reconstruction resolution and reduces the influence of data truncation to the image reconstruction. The present invention has some common advantages of the filtered backprojection in the form of the filtered backprojection, such as fast reconstruction and easy simultaneous operation and acceleration etc.
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公开(公告)号:WO2023280216A1
公开(公告)日:2023-01-12
申请号:PCT/CN2022/104148
申请日:2022-07-06
Applicant: 同方威视技术股份有限公司 , 清华大学
Abstract: 一种检查系统和方法,检测系统包括:承载装置(300);至少一个射线源(100),每个射线源(100)包括单独壳体(110)以限定真空空间并且包括封装在壳体(110)内的多个靶点;和探测器组件(200)。至少一个射线源(100)能够围绕旋转轴线相对于承载装置(300)在多个扫描位置之间转动,并且至少一个射线源(100)和探测器组件(200)能够相对于承载装置(300)沿旋转轴线升降。检查系统构造成:当至少一个射线源(100)相对于承载装置(300)位于多个扫描位置中的一个时,至少一个射线源(100)和探测器组件(200)相对于承载装置(300)沿旋转轴线升降并且至少一个射线源(100)发射X射线;并且当至少一个射线源(100)和探测器组件(200)相对于承载装置(300)升降预定距离后,至少一个射线源(100)围绕旋转轴线相对于承载装置(300)转动到多个扫描位置中的另一个。
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公开(公告)号:WO2023280210A1
公开(公告)日:2023-01-12
申请号:PCT/CN2022/104133
申请日:2022-07-06
Applicant: 清华大学 , 同方威视技术股份有限公司
IPC: G01V5/00
Abstract: 一种检查系统,包括:射线源(100),能够围绕旋转轴线在至少两个扫描位置之间转动,射线源(100)在相邻两个扫描位置之间的转动角度大于每个射线源(100)的相邻靶点相对于旋转轴线的角度;探测器组件(200);输送装置(300),用于承载被检查的物体(10)。射线源(100)和探测器组件(200)能够相对于输送装置(300)沿行进方向移动,从而被检查的物体(10)能够进入检查区域。当射线源(100)位于多个扫描位置中的一个时,射线源(100)和探测器组件(200)相对于输送装置(300)沿行进方向移动并且射线源(100)发射X射线;当射线源(100)和探测器组件(200)相对于输送装置(300)沿行进方向移动预定距离后,射线源(100)围绕旋转轴线转动到多个扫描位置中的另一个。
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公开(公告)号:WO2022233154A1
公开(公告)日:2022-11-10
申请号:PCT/CN2022/071627
申请日:2022-01-12
Applicant: 清华大学 , 同方威视技术股份有限公司
IPC: G01N23/046
Abstract: 一种静态CT检测设备,包括:屏蔽体(1),形成有被检测物能够通过的检测通道(G);射线源(3,30),当被检测物经过检测通道(G)时发射用于检测被检测物的射线;以及探测器(10),获取射线源(3,30)发射的、穿过检测通道(G)的射线,在屏蔽体(1)上形成有开口部(4),开口部(4)从检测通道(G)的入口延伸至检测通道(G)的出口。
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