-
公开(公告)号：US20190122781A1
公开(公告)日：2019-04-25
申请号：US16166042
申请日：2018-10-19
Applicant: TSINGHUA UNIVERSITY , NUCTECH COMPANY LIMITED
Inventor： Yigang YANG , Jianmin LI , Dongyu WANG , Hao YU , Weizhen WANG , Weiqiang GUAN , Wei YIN , Wei LI , Quanwei SONG , Yulan LI , Chunguang ZONG , Yaohong LIU , Yuanjing LI , Zhiqiang CHEN , Li ZHANG
Abstract: The present disclosure discloses a photoneutron source and a neutron inspection system. The photoneutron source comprises: an electron accelerating tube for accelerating an electron beam; an X-ray converting target, and the electron beam accelerated by the electron accelerating tube bombards the X-ray converting target to generate X-rays; a photoneutron target, and the X-rays enters the photoneutron target to generates photoneutrons; and a neutron modulation housing provided outside the photoneutron target, and the neutron modulation housing comprises a neutron collimation port for outputting photoneutrons. The present disclosure may directly output a desired neutron beam from the neutron collimation port of the photoneutron source.
-
公开(公告)号：US20170365440A1
公开(公告)日：2017-12-21
申请号：US15696919
申请日：2017-09-06
Applicant: TSINGHUA UNIVERSITY , NUCTECH COMPANY LIMITED
Inventor： Yuanjing LI , Yaohong LIU , Jinsheng LIU , Huaping TANG , Chuanxiang TANG , Huaibi CHEN , Xinshui YAN
CPC classification number: H01J35/14 , H01J35/16 , H01J35/30 , H01J2235/16
Abstract: An apparatus and method to generate distributed x-rays. A hot cathode of an electron gun is used in vacuum to generate electron beams having certain initial movement energy and speed. Periodic scanning is performed with the initial low-energy electron beams, which are thus caused to be reciprocally deflected. A current-limiting device is provided in the travel path of the electron beams along the direction of the reciprocal deflection. Through holes arranged in an array on the current-limiting device, only part of the electron beams targeting specific positions can pass to form sequential electron beam currents distributed in an array. These electron beam currents are accelerated by a high-voltage electric field to obtain high energy, bombard an anode target, and thus sequentially generate corresponding focus spots and x-rays distributed in an array at the anode target.
-
33.发明申请公开(公告)号：US20170176299A1
公开(公告)日：2017-06-22
申请号：US15117086
申请日：2015-12-28
Applicant: Nuctech Company Limited
Inventor： Qingjun ZHANG , Yuanjing LI , Zhiqiang CHEN , Weiping ZHU , Huishao HE , Qiufeng MA , Yaohong LIU , Xiang ZOU , Jianping CHANG
CPC classification number: G01N1/02 , G01N1/2211 , G01N1/2214 , G01N1/2273 , G01N1/38 , G01N1/405 , G01N1/42 , G01N27/622 , G01N30/08 , G01N2030/128 , H01J49/0422 , H01J49/0459 , H01J49/0468
Abstract: The present invention discloses a sample injection device for sample collection and sample thermal desorption. The device comprises: a sample collection structure; a piston type adsorber having an adsorption cavity capable of being arranged to be in communication with the sample collection structure; a piston cylinder defining a piston chamber that is configured for accommodating the piston type adsorber and configured to be in communication with the adsorption cavity; a thermal desorption chamber that is configured to be in communication with the adsorption cavity and the piston chamber and is configured to thermally desorb the sample adsorbed in the adsorption cavity; and a pump that is configured to be in communication with the piston chamber via a conduit and is configured to pump a sample diffused in an ambient gas into the adsorption cavity through the sample collection structure, the adsorption cavity being configured to adsorb the sample collected by the sample collection structure; the piston type adsorber is configured to be movable between a sample collecting position where the adsorption cavity is located outside the thermal desorption chamber and in communication with the sample collection structure so as to adsorb the sample collected by the sample collection structure and a sample desorbing position where the adsorption cavity is located inside the thermal desorption chamber so that the adsorbed sample is thermally desorbed in the thermal desorption chamber. There are also provided a method of collecting and desorbing a sample by using the abovementioned device, and a trace detection apparatus.
-
公开(公告)号：US20170140526A1
公开(公告)日：2017-05-18
申请号：US15279664
申请日：2016-09-29
Applicant: NUCTECH COMPANY LIMITED
Inventor： Zhiqiang CHEN , Li ZHANG , Ziran ZHAO , Yaohong LIU , Cun CHENG , Qiang LI , Jianping GU , Jian ZHANG , Gang FU
CPC classification number: G06T7/0008 , G06K9/00771 , G06K9/18 , G06K9/3233 , G06K9/4604 , G06K9/4671 , G06K9/6215 , G06K2209/09 , G06Q30/018 , G06T7/11 , G06T7/136 , G06T2207/10116
Abstract: The present disclosure provides a method and a system for inspecting goods. The method includes the steps of: obtaining a transmission image and a HSCODE of inspected goods; processing the transmission image to obtain a region of interest; retrieving from a model library a model created based on the HSCODE, in accordance with the HSCODE of the inspected goods; and determining whether there are any goods not registered in a customs declaration that are contained in the region of interest based on the model. With the above solution, it is possible to inspect goods in a container efficiently, so as to find out whether there are goods not indicated in the customs declaration that are concealed in the container.
-
公开(公告)号：US20160189360A1
公开(公告)日：2016-06-30
申请号：US14700249
申请日：2015-04-30
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Kejun KANG , Zhiqiang CHEN , Li ZHANG , Ziran ZHAO , Yaohong LIU , Jian ZHANG , Jianping GU , Qiang LI , Duokun ZHANG
CPC classification number: G06T7/0004 , G01N23/04 , G01V5/0016 , G06K9/4604 , G06K9/4642 , G06K9/52 , G06K9/6215 , G06K9/6256 , G06K2009/4666
Abstract: The present disclosure discloses a method and system for inspecting cargoes. The method comprises: acquiring a transmission image of the inspected cargoes; processing the transmission image to acquire an interested region; extracting features from the interested region, and determining cargo information of the inspected cargoes according to the extracted features; and providing a proposed treatment suggestion of the cargoes based on the determined cargo information and at least a part of information in a manifest. The above solution can facilitate an image judgment person to accurately judge whether the concerned cargoes are allowed to pass.
Abstract translation: 本公开公开了一种用于检查货物的方法和系统。 该方法包括：获取被检货物的透射图像; 处理所述传输图像以获取感兴趣的区域; 从感兴趣区域提取特征，并根据提取的特征确定被检货物的货物信息; 并根据确定的货物信息和清单中的至少一部分信息提供货物的拟议处理建议。 上述解决方案可以方便图像判断人员准确判断有关货物是否允许通过。
-
Patent Agency Ranking
公开(公告)号：US20150185190A1
公开(公告)日：2015-07-02
申请号：US14577653
申请日：2014-12-19
Applicant: Nuctech Company Limited
Inventor： Qingjun ZHANG , Yuanjing LI , Zhiqiang CHEN , Qiufeng MA , Ziran ZHAO , Yinong LIU , Yaohong LIU , Xiang ZOU , Yanchun WANG , Junxiao WANG , Jianping CHANG
CPC classification number: G01N30/7206 , G01N27/622 , G01N27/64 , H01J49/0422
Abstract: A GC-IMS system is disclosed in embodiments of the present invention. The system comprises a sample transfer device. The sample transfer device connects the gas chromatograph to the reaction region and, the sample from the gas chromatograph is transferred to the reaction region by the sample transfer device directly, instead of not through the ionization region. With the GC-IMS system, generation of sample molecular ion fragments can be avoided so that the spectrum is brevity and is easily identified; moreover, the application field of the GC-IMS system is extended to a range of analysis of organic macromolecule samples which have a high polarity, are difficult to volatilize, and are thermally instable. On the other hand, the GC-IMS system overcomes the defect of ion destruction due to neutralization reaction among positive and negative ions so as to evade the detection.
Abstract translation: 在本发明的实施例中公开了一种GC-IMS系统。 该系统包括样品转移装置。 样品转移装置将气相色谱仪连接到反应区域，气相色谱仪的样品直接通过样品转移装置转移到反应区域，而不是通过电离区域。 使用GC-IMS系统，可以避免产生样品分子离子片段，使得光谱简洁易于识别; 此外，GC-IMS系统的应用领域扩展到具有高极性，难以挥发和热不稳定的有机大分子样品的一系列分析。 另一方面，GC-IMS系统克服了由于正离子和负离子之间的中和反应引起的离子破坏的缺陷，以避免检测。
-
37.发明申请公开(公告)号：US20140185775A1
公开(公告)日：2014-07-03
申请号：US14137262
申请日：2013-12-20
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Chuanxiang TANG , Zhe ZHANG , Qingxiu JIN , Jiaru SHI , Huaibi CHEN , Wenhui HUANG , Shuxin ZHENG , Yaohong LIU
Abstract: A standing wave electron linear accelerating apparatus and a method thereof are disclosed. The apparatus comprises an electron gun configured to generate electron beams; a pulse power source configured to provide a primary pulse power signal; a power divider coupled downstream from the pulse power source and configured to divide the primary pulse power signal outputted from the pulse power source into a first pulse power signal and a second pulse power signal; a first accelerating tube configured to accelerating the electron beams with the first pulse power signal; a second accelerating tube configured to accelerate the electron beams with the second pulse power signal; a phase shifter configured to continuously adjust a phase difference between the first pulse power signal and the second pulse power signal so as to generate accelerated electron beams with continuously adjustable energy at output of the second accelerating tube.
Abstract translation: 公开了一种驻波电子线性加速装置及其方法。 该装置包括配置成产生电子束的电子枪; 脉冲电源，被配置为提供初级脉冲功率信号; 耦合到所述脉冲电源的下游并被配置为将从所述脉冲电源输出的所述主脉冲功率信号划分为第一脉冲功率信号和第二脉冲功率信号的功率分配器; 第一加速管，被配置为用第一脉冲功率信号加速电子束; 第二加速管，被配置为用所述第二脉冲功率信号加速所述电子束; 移相器，被配置为连续地调节第一脉冲功率信号和第二脉冲功率信号之间的相位差，以便在第二加速管的输出处产生具有连续可调能量的加速电子束。
-
公开(公告)号：US20240215146A1
公开(公告)日：2024-06-27
申请号：US18501435
申请日：2023-11-03
Applicant: Nuctech Company Limited
Inventor： Liang ZHANG , Yaohong LIU , Hao ZHA , Yu HE
Abstract: The present application relates to a blocker rotary-switching device, a control method thereof and an accelerator, the device including: a plurality of blockers for changing dose distribution of rays output from an accelerating tube of an accelerator, the plurality of blockers including blockers which have different change amounts to the dose distribution; and a rotary switch installed with the plurality of blockers and switching positions where the blockers are installed by rotation so as to locate the blocker at an installation position corresponding to a target dose distribution at an outlet of the accelerating tube. By providing a plurality of blockers and rotatably switching the plurality of blockers, a plurality of dose distributions can be achieved without frequently replacing the blocker.
-
公开(公告)号：US20200209192A1
公开(公告)日：2020-07-02
申请号：US16727612
申请日：2019-12-26
Applicant: NUCTECH COMPANY LIMITED , Tsinghua University
Inventor： Qingjun ZHANG , Yuanjing LI , Zhiqiang CHEN , Jianmin LI , Yaohong LIU , Weiping ZHU , Qiufeng MA , Biao CAO , Ge LI , Wei WANG , Lili YAN , Guangqin LI
Abstract: Embodiments of the present disclosure provide an ion mobility spectrometer device. The ion mobility spectrometer device includes: an ion mobility tube, a sampling device, and a sampling and circulating gas path. The sampling device includes a solid sample desorption device and a gas sampling device. The solid sample desorption device is configured to process the solid sample into a first mixed gas containing the solid sample, and the gas sampling device is configured to process the gas sample into a second mixed gas containing the gas sample. The sampling and circulating gas path is configured to transfer the first mixed gas and/or the second mixed gas into the ion mobility tube for detection.
-
公开(公告)号：US20190204271A1
公开(公告)日：2019-07-04
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
CPC classification number: G01N27/622 , G01N1/2205 , G01N1/2211 , G01N1/24 , G01N2001/244
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.
-
-
-
-
-
-
-
-
-
Search Results
55
records
(took 0.03 seconds)
