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公开(公告)号：US20200240961A1
公开(公告)日：2020-07-30
申请号：US16714799
申请日：2019-12-16
Applicant: NUCTECH COMPANY LIMITED , TSINGHUA UNIVERSITY
Inventor： Qingjun ZHANG , Yuanjing LI , Zhiqiang CHEN , Weiping ZHU , Yaohong LIU , Qiufeng MA , Ge LI , Biao CAO , Lili YAN
Abstract: The present disclosure discloses a gas chromatograph-ion mobility spectrometry combined equipment, including: a gas chromatograph device for pre-separating a to-be-detected sample to form a pre-separated sample; an ion mobility spectrometry device in fluid communication with an outlet of the gas chromatograph device for detecting the pre-separated sample; and a gas circulating device in fluid communication with a discharged gas interface of the ion mobility spectrometry device for processing a discharged gas from the ion mobility spectrometry device, wherein the gas circulating device is further in gas communication with the gas chromatograph device for conveying a part of the discharged gas to the gas chromatograph device to serve as a carrier gas, which drives the to-be-detected sample to enter the gas chromatograph device. The miniaturization and the portability of the gas chromatograph-ion mobility spectrometry combined equipment are improved.
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公开(公告)号：US20200137868A1
公开(公告)日：2020-04-30
申请号：US16667849
申请日：2019-10-29
Applicant: NUCTECH COMPANY LIMITED
Inventor： Jinsheng LIU , Yaohong LIU , Wei JIA , Xinshui YAN , Wei LI
Abstract: The present disclosure provides a filament power supply for an electron accelerator and an electron accelerator. The filament power supply includes: a rectifier circuit configured to convert a power frequency AC voltage signal into a DC voltage signal; an inverter circuit configured to convert the DC voltage signal into an AC voltage signal; a sampling circuit configured to sample the AC voltage signal to obtain a current sampling signal or a voltage sampling signal; a pulse width modulation control chip configured to adjust a pulse width modulation signal until a voltage of the current sampling signal is equal to that of a reference current signal, or a voltage of the voltage sampling signal is equal to that of a reference voltage signal; a modulation circuit configured to modulate the power frequency AC voltage signal to obtain a modulation signal and output the pulse width modulation signal and the modulation signal.
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公开(公告)号：US20190193017A1
公开(公告)日：2019-06-27
申请号：US16232050
申请日：2018-12-26
Applicant: NUCTECH COMPANY LIMITED , TSINGHUA UNIVERSITY
Inventor： Qingjun ZHANG , Yuanjing LI , Zhiqiang CHEN , Ziran ZHAO , Yinong LIU , Yaohong LIU , Lili YAN , Ge LI , Qiufeng MA , Nan BAI
CPC classification number: B01D53/0446 , B01D53/025 , B01D53/0438 , B01D2257/80 , B01D2259/40003 , B01D2259/40086 , B01D2259/40096 , G01N27/622 , G01N30/26 , G01N2030/025
Abstract: The present disclosure relates to a gas purification apparatus and a trace substance detection device. The gas purification apparatus includes a first purification component, a second purification component and a switching component, wherein the switching component can be switched between a first state and a second state, the first purification component and a component to be purified form a gas purification loop in the first state, and the second purification component can provide a regeneration gas for the first purification component in the second state, so that water vapor and impurities in the first purification component are discharged to outside. In the gas purification apparatus, the filtered air is used as the regeneration gas to prevent secondary pollution in a recycling process of the purificant; furthermore, by means of the state switching function of the switching component, the mutual interference between the two working states of purification and regeneration can be prevented, and all the above advantages can improve the reliability of the recycling of the purificant, thereby optimizing the performance and the service life of the gas purification apparatus.
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公开(公告)号：US20190170894A1
公开(公告)日：2019-06-06
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：US20170308766A1
公开(公告)日：2017-10-26
申请号：US15129389
申请日：2015-12-23
Applicant: NUCTECH COMPANY LIMITED
Inventor： Zhiqiang CHEN , Li ZHANG , Ziran ZHAO , Yaohong LIU , Duokun ZHANG , Jianping GU , Qiang LI , Jian ZHANG
CPC classification number: G06K9/3241 , G01N23/046 , G01V5/0016 , G01V5/005
Abstract: An inspection method and system for inspecting whether there is any liquor in goods is provided. The method includes: acquiring a radiation image of goods being inspected; processing on the radiation image to obtain an ROI; inspecting on the ROI using a liquor goods inspection model to determine if the ROI of the radiation image contains liquor goods. The above solution performs liquor inspection on scanned images of goods, especially containers, so as to intelligently assist the image inspectors.
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Patent Agency Ranking
公开(公告)号：US20170178312A1
公开(公告)日：2017-06-22
申请号：US15278101
申请日：2016-09-28
Applicant: Tsinghua University , NUCTECH COMPANY LIMITED
Inventor： Yuanjing LI , Ziran ZHAO , Yaohong LIU , Qili WANG , Qiang LI , Jianping GU
CPC classification number: G06T7/0004 , G01N23/04 , G01N2223/401 , G01N2223/626 , G06K9/48 , G06T7/0085 , G06T7/13 , G06T7/40 , G06T2207/10116
Abstract: The present disclosure provides a method and a system for inspecting goods. The method comprises steps of: obtaining a transmission image of inspected goods; processing the transmission image to obtain a suspicious region; extracting local texture features of the suspicious region and classifying the local texture features of the suspicious region based on a pre-created model to obtain a classification result; extracting a contour line shape feature of the suspicious region and comparing the contour line shape feature with a pre-created standard template to obtain a comparison result; and determining that the suspicious region contains a high atomic number matter based on the classification result and the comparison result.
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公开(公告)号：US20150185356A1
公开(公告)日：2015-07-02
申请号：US14582076
申请日：2014-12-23
Applicant: NUCTECH COMPANY LIMITED , TSINGHUA UNIVERSITY
Inventor： Huaping TANG , Zhiqiang CHEN , Chuanxiang TANG , Huaibi CHEN , Yuanjing LI , Ziran ZHAO , Yaohong LIU , Shangmin SUN , Xinshui YAN , Zhanfeng QIN
IPC: G01V5/00
CPC classification number: G01V5/0016 , G01V5/0033 , G01V5/005 , G01V5/0066
Abstract: The present invention may perform fluoroscopic imaging simultaneously on the subjects in at least two channels using only one electron accelerator, at least two sets of X-ray beams and at least two sets of detector systems, through the design of the electron accelerator, the shielding and collimating device, the at least two detector arrays and various mechanical composite structures. The X-ray fluoroscopic imaging system according to the present invention may be designed in specific forms of a stationary type, an assembled type, a track mobile type or vehicular mobile type, etc., and has advantages such as simple structure, low cost, strong function, good image quality and the like.
Abstract translation: 本发明可以通过电子加速器的设计，通过电子加速器的设计，仅使用一个电子加速器，至少两组X射线束和至少两组检测器系统，在至少两个通道中的受试者上进行透视成像 和准直装置，至少两个检测器阵列和各种机械复合结构。 根据本发明的X射线透视成像系统可以以固定型，组装式，轨道移动型或车辆型移动式等的特定形式设计，具有结构简单，成本低廉等优点， 功能强大，图像质量好等优点。
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公开(公告)号：US20240379258A1
公开(公告)日：2024-11-14
申请号：US18690081
申请日：2022-07-22
Applicant: NUCTECH COMPANY LIMITED
Inventor： Yaohong LIU , Wei YIN , Yumei CHEN , Weiqiang GUAN , Weike LI
Abstract: Provided are a ray collimation device and a radiation inspection device. The ray collimation device includes a collimation assembly, a transmission assembly, and a driving assembly. The collimation assembly includes a first collimation block and a second collimation block. A collimation opening for collimating rays is provided between the first collimation block and the second collimation block. The transmission assembly includes a first transmission component and a second transmission component connected in a transmission manner, the second transmission component is connected to the driving assembly, and the first transmission component is connected to the first collimation block and the second collimation block. Under a drive of the driving assembly, the first transmission component is movable to drive the first collimation block and the second collimation block to move toward or away from each other at a same speed, thereby adjusting a width of the collimation opening.
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公开(公告)号：US20210215582A1
公开(公告)日：2021-07-15
申请号：US16314063
申请日：2018-12-10
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Qingjun ZHANG , Yuanjing LI , Zhiqiang CHEN , Ziran ZHAO , Yinong LIU , Yaohong LIU , Lili YAN , Ge LI , Qiufeng MA
IPC: G01N1/34 , G01N1/44 , G01N27/622 , G01N1/22
Abstract: Embodiments of the present disclosure provide a gas purifying device and an ion migration spectrometer. The gas purifying device includes a first purificant vessel, a second purificant vessel and a valve communicated between the first purificant vessel and the second purificant vessel. The valve is configured to allow a gas flows from the second purificant vessel to the first purificant vessel in a first state and to permit the gas to flow from the first purificant vessel to the second purificant vessel in a second state.
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公开(公告)号：US20210204390A1
公开(公告)日：2021-07-01
申请号：US17247800
申请日：2020-12-23
Applicant: NUCTECH COMPANY LIMITED
Inventor： Yaohong LIU , Jinsheng LIU , Wei JIA , Wei YIN , Feng GAO , Xiying LIU , Haokun WANG
Abstract: Embodiments of the disclosed technology provide an apparatus for controlling a standing wave linear accelerator. An example standing wave linear accelerator includes an accelerating tube, a motor, and a microwave power source connected between the accelerating tube and the motor. An example apparatus includes a main processor configured to receive an envelope signal of a reflected wave signal output by the accelerating tube, determine whether an amplitude of the envelope signal is greater than an envelope threshold, and if it is determined that the amplitude of the envelope signal is less than the envelope threshold, determine whether to change a rotation direction of the motor by comparing the amplitude of the envelope signal with an envelope reference signal stored in a memory. The memory is connected to the main processor and is configured to store the envelope threshold and the envelope reference signal.
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