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公开(公告)号：US10775302B2
公开(公告)日：2020-09-15
申请号：US16232318
申请日：2018-12-26
Applicant: NUCTECH COMPANY LIMITED
Inventor： Ziran Zhao , Haifan Hu , Xuming Ma , Yingxin Wang
IPC: G01N21/35 , G01J1/44 , G01N21/3581 , G01J1/42 , G01J1/04
Abstract: The present disclosure provides a terahertz detector. The terahertz detector includes a planar array structure that is constituted by a plurality of pixel units, the plurality of pixel units each include N sub pixels and each of the sub pixels includes no more than one signal trigger configured to transform a terahertz signal to an electrical current pulsing signal, and each of the plurality of pixel units detects a signal that is a sum of the electrical current pulsing signals of the N sub pixels, where N is an integer greater than 1.
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公开(公告)号：US12007523B2
公开(公告)日：2024-06-11
申请号：US17304903
申请日：2021-06-28
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Ziran Zhao , Yan You , Yuanjing Li , Xuming Ma , Jian Wu
Abstract: The application describes a security inspection apparatus and a method of controlling the same. An example security inspection apparatus includes a body fixed in the field and an electromagnetic imaging device installed on the body. The electromagnetic imaging device includes a two-dimensional multi-input multi-output array panel, including at least one two-dimensional multi-input multi-output sub-array and a control circuit. Each two-dimensional multi-input multi-output sub-array includes transmitting antennas and receiving antennas, with the transmitting antennas and the transmitting antennas being arranged such that equivalent phase centers are arranged in a two-dimensional array. The electromagnetic imaging device further includes a signal processing device configured to reconstruct an image of an inspected object based on an echo signal received and a display device configured to display the reconstructed image of the inspected object.
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公开(公告)号：US11733422B2
公开(公告)日：2023-08-22
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
CPC classification number: G01V8/20 , G01V5/0008 , G01V8/005
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：US12164023B2
公开(公告)日：2024-12-10
申请号：US17304927
申请日：2021-06-28
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Zhiqiang Chen , Yan You , Ziran Zhao , Xuming Ma , Kai Wang
Abstract: A security inspection apparatus and a method of controlling the same are described. An example security inspection apparatus includes a bottom plate configured to carry an inspected object and a two-dimensional multi-input multi-output array panel, including at least one two-dimensional multi-input multi-output sub-array. Each two-dimensional multi-input multi-output sub-array includes transmitting antennas and receiving antennas arranged such that equivalent phase centers are arranged in a two-dimensional array. The security inspection apparatus includes a control circuit configured to control the transmitting antennas to transmit a detection signal in a form of an electromagnetic wave to the inspected object in a preset order, and to control the receiving antennas to receive an echo signal from the inspected object. The security inspection apparatus includes a signal processing device configured to reconstruct an image of an inspected object based on an echo signal received and a display device configured to display the reconstructed image.
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公开(公告)号：US20210325561A1
公开(公告)日：2021-10-21
申请号：US17304903
申请日：2021-06-28
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Ziran Zhao , Yan You , Yuanjing Li , Xuming Ma , Jian Wu
Abstract: The application describes a security inspection apparatus and a method of controlling the same. An example security inspection apparatus includes a body fixed in the field and an electromagnetic imaging device installed on the body. The electromagnetic imaging device includes a two-dimensional multi-input multi-output array panel, including at least one two-dimensional multi-input multi-output sub-array and a control circuit. Each two-dimensional multi-input multi-output sub-array includes transmitting antennas and receiving antennas, with the transmitting antennas and the transmitting antennas being arranged such that equivalent phase centers are arranged in a two-dimensional array. The electromagnetic imaging device further includes a signal processing device configured to reconstruct an image of an inspected object based on an echo signal received and a display device configured to display the reconstructed image of the inspected object.
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Patent Agency Ranking
公开(公告)号：US20210325528A1
公开(公告)日：2021-10-21
申请号：US17304927
申请日：2021-06-28
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Zhiqiang Chen , Yan You , Ziran Zhao , Xuming Ma , Kai Wang
Abstract: A security inspection apparatus and a method of controlling the same are described. An example security inspection apparatus includes a bottom plate configured to carry an inspected object and a two-dimensional multi-input multi-output array panel, including at least one two-dimensional multi-input multi-output sub-array. Each two-dimensional multi-input multi-output sub-array includes transmitting antennas and receiving antennas arranged such that equivalent phase centers are arranged in a two-dimensional array. The security inspection apparatus includes a control circuit configured to control the transmitting antennas to transmit a detection signal in a form of an electromagnetic wave to the inspected object in a preset order, and to control the receiving antennas to receive an echo signal from the inspected object. The security inspection apparatus includes a signal processing device configured to reconstruct an image of an inspected object based on an echo signal received and a display device configured to display the reconstructed image.
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公开(公告)号：US12149014B2
公开(公告)日：2024-11-19
申请号：US17418951
申请日：2019-10-10
Applicant: NUCTECH COMPANY LIMITED
Inventor： Yuanjing Li , Haifan Hu , Ziran Zhao , Xuming Ma
Abstract: The present disclosure provides a terahertz mixer, a method of manufacturing the terahertz mixer, and an electronic device including the mixer. The terahertz mixer includes: a cavity for forming a radio frequency input waveguide and a local oscillator input waveguide, and for accommodating a microstrip line; the microstrip line formed on at least a part of an inner surface of the cavity by using a semiconductor growth process, wherein the microstrip line extends into a portion of the cavity where the radio frequency input waveguide is located so as to form a microstrip antenna for receiving a radio frequency input signal, and into a portion of the cavity where the local oscillator input waveguide is located so as to form a microstrip antenna for receiving a local oscillator input signal.
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公开(公告)号：US12004426B2
公开(公告)日：2024-06-04
申请号：US17418967
申请日：2019-10-10
Applicant: NUCTECH COMPANY LIMITED , Tsinghua University
Inventor： Ziran Zhao , Yingxin Wang , Meng Chen , Xuming Ma
IPC: H10N15/10
CPC classification number: H10N15/15
Abstract: A terahertz detector and a method of manufacturing a terahertz detector, wherein the terahertz detector including a substrate (2) and at least one detection unit. Each detection unit includes: a channel material (1) arranged on the substrate, two electrodes (3, 4) respectively in ohmic contact with both ends of the channel material (1) in a longitudinal direction, and a three-dimensional grapheme (5) in direct or indirect thermal contact with the channel material (1).
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公开(公告)号：US11662457B2
公开(公告)日：2023-05-30
申请号：US17354056
申请日：2021-06-22
Applicant: NUCTECH COMPANY LIMITED , Tsinghua University
Inventor： Zhiqiang Chen , Ziran Zhao , Yan You , Yuanjing Li , Shixin Zhang , Huan Xie , Xuming Ma , Rui Fan , Yinglei Wang
IPC: B25J9/16 , G01S13/88 , G01S13/89 , G06K9/20 , G06T7/50 , G06T7/70 , H01Q13/02 , H01Q21/06 , H04N5/232 , H04N5/247 , G06V10/143 , G06V10/147
CPC classification number: B25J9/1697 , G01S13/887 , G01S13/89 , G06T7/50 , G06T7/70 , G06V10/143 , G06V10/147 , H01Q13/02 , H01Q21/064 , H04N5/23299 , H04N5/247 , G06V2201/05
Abstract: A terahertz security inspection robot is provided, including: a housing including a main housing and a head housing rotatably connected to the main housing; a terahertz wave imaging mechanism including a mirror assembly arranged in the head housing and a detector array arranged in the main housing; and a rotating mechanism configured to cause the head housing and the mirror assembly located in the head housing to rotate with respect to the main housing, so that the mirror assembly of the terahertz wave imaging mechanism is oriented in different directions to respectively perform terahertz scanning and imaging on objects to be inspected in different inspection regions in a security inspection scene.
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10.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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