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31.发明申请公开(公告)号：US20220221576A1
公开(公告)日：2022-07-14
申请号：US17309915
申请日：2019-10-10
Applicant: Tsinghua Park , Nuctech Company Limited
Inventor： Ziran Zhao , Yan You , Yuanjing Li , Xuming Ma , Jian Wu
Abstract: The present disclosure provides an electromagnetic imaging device for an active microwave and millimeter wave security inspection apparatus, including: a two-dimensional multiple-input multiple-output array panel including at least one sub-array, wherein each sub-array includes a plurality of transmitting antennas arranged linearly and a plurality of receiving antennas arranged linearly, the plurality of transmitting antennas arranged linearly being intersected with the plurality of receiving antennas arranged linearly; a signal processing device; a display device; and a ranging radar. In each sub-array, a midpoint of a connection line between each transmitting antenna and a corresponding receiving antenna serves as a virtual equivalent phase center of a pair of the each transmitting antenna and the corresponding receiving antenna, and the plurality of transmitting antennas and the plurality of receiving antennas are arranged to generate an equivalent phase center web. A distance between adjacent transmitting antennas or a distance between adjacent receiving antennas is equal to a wavelength of the electromagnetic wave with the specific frequency, and a distance between adjacent equivalent phase centers in the equivalent phase center web generated ranges from 30% to 70% of the wavelength of the electromagnetic wave with the specific frequency.
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公开(公告)号：US11346975B2
公开(公告)日：2022-05-31
申请号：US16467140
申请日：2017-08-04
Applicant: NUCTECH COMPANY LIMITED
Inventor： Zhiqiang Chen , Ziran Zhao , Yaohong Liu , Jianping Gu , Qian Yi , Bicheng Liu , Guangming Xu
IPC: G01V5/00 , G01N23/046 , G01T1/29
Abstract: The present disclosure provides a spiral Computed Tomography (CT) device and a three-dimensional image reconstruction method. The spiral CT device includes: an inspection station operable to carry an object to be inspected and defining an inspection space; a rotational supporting apparatus disposed around the inspection space; a plurality of X-ray sources located on the rotational supporting apparatus; and a plurality of X-ray receiving apparatuses located on the rotational supporting apparatus and opposing to the plurality of X-ray sources respectively, wherein the plurality of X-ray sources and the plurality of X-ray receiving apparatuses are rotational synchronously with the rotational supporting apparatus, wherein the plurality of X-ray sources are closely disposed and fan-shaped X-ray beams provided by the plurality of X-ray sources cover the inspection space with a minimum degree of overlapping.
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公开(公告)号：US20220066065A1
公开(公告)日：2022-03-03
申请号：US17309908
申请日：2019-10-09
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Ziran Zhao , Yingxin Wang , Meng Chen , Xuming Ma
Abstract: The present disclosure provides a portable terahertz security inspection apparatus, including: a carrying body; a terahertz emitting device arranged on the carrying body, wherein the terahertz emitting device includes a terahertz signal source and an emitting unit connected to the terahertz signal source and configured to emit a terahertz wave; a terahertz detector arranged on the carrying body and configured to receive the terahertz wave reflected from an inspected object; a data acquisition and processing system arranged on the carrying body and connected to the terahertz detector, wherein the data acquisition and processing system is configured to receive a scan data for the inspected object from the terahertz detector and generate a terahertz image; and a display device connected to the data acquisition and processing system and configured to receive and display the terahertz image from the data acquisition and processing system. The portable terahertz security inspection apparatus does not need to be equipped with a mechanical scanning system, so that a volume and a weight of the terahertz security inspection apparatus may be greatly reduced, and a security inspector may move the terahertz security inspection apparatus manually to perform scanning of the imaging area.
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公开(公告)号：US11215626B2
公开(公告)日：2022-01-04
申请号：US16406272
申请日：2019-05-08
Applicant: TSINGHUA UNIVERSITY , Nuctech Company Limited
Inventor： Qingjun Zhang , Yuanjing Li , Zhiqiang Chen , Ziran Zhao , Yinong Liu , Yaohong Liu , Qiufeng Ma , Lili Yan , Weiping Zhu , Biao Cao
Abstract: The present disclosure provides a gate system for sample detection and a method of sample inspection, which relate to the field of detection and analysis technology. The gate system comprises: an accommodating apparatus configured to accommodate an inserted ticket to be detected; a wipe sampling apparatus including a wipe sampling belt which is configured to drive the ticket to be detected to move within the accommodating apparatus and to conduct a wipe sampling to the ticket; an inspiratory sampling apparatus configured to collect samples dropped from the wipe sampling apparatus; and a detection apparatus configured to detect the samples and output detection results. The gate system for sample detection and the method of sample inspection provided by the present disclosure have a wide range of applications and can perform rapid sampling and detection to those substances that are difficult to be volatilized.
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公开(公告)号：US11193860B2
公开(公告)日：2021-12-07
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 , G01N1/22 , G01N1/44 , G01N27/622
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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Patent Agency Ranking
公开(公告)号：US20200209384A1
公开(公告)日：2020-07-02
申请号：US16683365
申请日：2019-11-14
Applicant: Nuctech Company Limited
Inventor： Ziran Zhao , Zhimin Zheng , Lingbo Qiao , Yingkang Jin , Wenguo Liu
Abstract: A millimeter wave security check gate is provided, comprising: a gate body; and a top millimeter wave imaging system, comprising: a millimeter wave transceiving antenna array disposed at a top of the gate body, wherein the millimeter wave transceiving antenna array comprises at least one transmitting antenna unit and a plurality of receiving antenna units; and a millimeter wave signal source connected with the millimeter wave transceiving antenna array.
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公开(公告)号：US10654196B2
公开(公告)日：2020-05-19
申请号：US15815819
申请日：2017-11-17
Applicant: Nuctech Company Limited
Inventor： Yanchun Wang , Qingjun Zhang , Yuanjing Li , Zhiqiang Chen , Ziran Zhao , Yinong Liu , Yaohong Liu , Nan Bai
IPC: B29C33/00 , C04B35/50 , B30B11/00 , B30B15/02 , B22F3/14 , C04B35/645 , B28B3/00 , C04B35/515 , C04B35/547 , G01T1/20 , C04B111/80
Abstract: A mold and a method of manufacturing GOS ceramic scintillator by using the mold are provided. The mold comprises: a female outer sleeve having a cavity disposed inside; a plurality of female blocks disposed inside the cavity, the plurality of female blocks being put together to form a composite structure having a vertical through hole; and a male upper pressing head and a male lower pressing head, wherein each of the male upper pressing head and the male lower pressing head has a shape consistent with that of the vertical through hole. The disclosure may reduce defects of the related art in hot-pressing-sintering such as a mold has a short retirement period and a high material waste, significantly reduce the cost for production of the GOS ceramic scintillator, and significantly improve a process economy.
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公开(公告)号：US10646179B2
公开(公告)日：2020-05-12
申请号：US15720502
申请日：2017-09-29
Applicant: NUCTECH COMPANY LIMITED
Inventor： Guangming Xu , Bicheng Liu , Ziran Zhao , Lan Zhang , Jianping Gu
Abstract: The present disclosure provides a method for recognizing an article using a multi-energy spectrum X-ray imaging system and a multi-energy spectrum X-ray imaging system. The method comprises: recognizing an application scenario and/or priori information of the article; selecting a parameter mode suitable for the article from a plurality of parameter modes stored in the multi-energy spectrum X-ray imaging system based on the recognized application scenario and/or priori information; and recognizing the article using the selected parameter mode, wherein the plurality of parameter modes are obtained by optimizing system parameters of the multi-energy spectrum X-ray imaging system under a specific condition using a training sample library for various articles.
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公开(公告)号：US10607483B2
公开(公告)日：2020-03-31
申请号：US15300947
申请日：2015-12-23
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Zhiqiang Chen , Li Zhang , Jianmin Li , Ziran Zhao , Yaohong Liu , Qiang Li , Zheng Hu , Jianping Gu , Ying Li
Abstract: Disclosed is a vehicle identification method and system. The method includes: acquiring appearance information of an inspected vehicle; obtaining external features of the vehicle based on the appearance information; acquiring a transmission image of the vehicle and obtaining internal features of the vehicle from the transmission image; forming descriptions on the vehicle at least based on the external features and the internal features; and determining a vehicle model of the vehicle from a vehicle model databased by utilizing the descriptions. This method merges various types of modality information, especially introducing the transmission image, and combines the internal structure information with the appearance information, so that the present disclosure can identify a vehicle model more practically.
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公开(公告)号：US10586324B2
公开(公告)日：2020-03-10
申请号：US15827722
申请日：2017-11-30
Applicant: Nuctech Company Limited
Inventor： Ziran Zhao , Jianping Gu , Qian Yi , Bicheng Liu
Abstract: The present disclosure discloses an inspection device and a method for inspecting a container. Transmission scanning is performed on the inspected container using a scanning device including a sparse area array detector to obtain scan data. Digital focusing is performed at a specific depth position in a depth direction. Defocused pixel values are filtered out to obtain a slice image at the specific depth position. It is judged whether dangerous articles or suspicious articles are included in the slice image.
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