Patents by Inventor Xuming MA
Xuming MA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 12004426Abstract: 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).Type: GrantFiled: October 10, 2019Date of Patent: June 4, 2024Assignees: NUCTECH COMPANY LIMITED, Tsinghua UniversityInventors: Ziran Zhao, Yingxin Wang, Meng Chen, Xuming Ma
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Publication number: 20240106586Abstract: An information transmission method and a network device, the network device including a transceiver, a processor, and a non-transitory storage medium storing a computer program for execution by the processor. The computer program includes instructions to receive a first frame through the receiver, where an extended schedule element of the first frame has a field indicating communication between network devices is supported, and where the extended schedule element further has a source association identifier and a destination association identifier, and control the transceiver to transmit information to a first network device when both the first network device and the network device support communication between network devices, where a value of the source association identifier and a value of the destination association identifier are each 0.Type: ApplicationFiled: December 4, 2023Publication date: March 28, 2024Inventors: Xiao Han, Changfeng Ding, Xuming Fang, Yan Long, Mengyao Ma
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Patent number: 11733422Abstract: 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.Type: GrantFiled: October 9, 2019Date of Patent: August 22, 2023Assignees: Nuctech Company Limited, Tsinghua UniversityInventors: Ziran Zhao, Yingxin Wang, Meng Chen, Xuming Ma
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Patent number: 11662457Abstract: 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.Type: GrantFiled: June 22, 2021Date of Patent: May 30, 2023Assignees: Tsinghua University, NUCTECH COMPANY LIMITEDInventors: Zhiqiang Chen, Ziran Zhao, Yan You, Yuanjing Li, Shixin Zhang, Huan Xie, Xuming Ma, Rui Fan, Yinglei Wang
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Publication number: 20230154942Abstract: Provided are a method of manufacturing a terahertz detection device including detectors and lenses arranged in an array and a terahertz detection apparatus. An example method includes forming detectors in a first area of a first surface of a base substrate through a double-sided photoetching process to form a detector array, and providing at least one first alignment mark in a second area of the first surface of the base substrate. A plurality of lens mounting parts are formed in a third area of a second surface of the base substrate through the double-sided photoetching process, and at least one second alignment mark is provided in a fourth area of the second surface of the base substrate. The lenses are mounted to the lens mounting parts to form the detection device. The first alignment mark is aligned with the second alignment mark by using a double-sided photoetching machine.Type: ApplicationFiled: November 10, 2022Publication date: May 18, 2023Inventors: Ziran ZHAO, Shoulu JIANG, Xuming MA
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Publication number: 20220221576Abstract: 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.Type: ApplicationFiled: October 10, 2019Publication date: July 14, 2022Inventors: Ziran Zhao, Yan You, Yuanjing Li, Xuming Ma, Jian Wu
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Publication number: 20220115576Abstract: 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).Type: ApplicationFiled: October 10, 2019Publication date: April 14, 2022Inventors: Ziran ZHAO, Yingxin WANG, Meng CHEN, Xuming MA
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Publication number: 20220109241Abstract: 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.Type: ApplicationFiled: October 10, 2019Publication date: April 7, 2022Applicant: NUCTECH COMPANY LIMITEDInventors: Yuanjing LI, Haifan HU, Ziran ZHAO, Xuming MA
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Publication number: 20220066065Abstract: 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.Type: ApplicationFiled: October 9, 2019Publication date: March 3, 2022Inventors: Ziran Zhao, Yingxin Wang, Meng Chen, Xuming Ma
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Publication number: 20210394366Abstract: 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.Type: ApplicationFiled: June 22, 2021Publication date: December 23, 2021Inventors: Zhiqiang CHEN, Ziran ZHAO, Yan YOU, Yuanjing LI, Shixin ZHANG, Huan XIE, Xuming MA, Rui FAN, Yinglei WANG
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Publication number: 20210325561Abstract: 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.Type: ApplicationFiled: June 28, 2021Publication date: October 21, 2021Inventors: Ziran Zhao, Yan You, Yuanjing Li, Xuming Ma, Jian Wu
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Publication number: 20210325528Abstract: 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.Type: ApplicationFiled: June 28, 2021Publication date: October 21, 2021Inventors: Zhiqiang Chen, Yan You, Ziran Zhao, Xuming Ma, Kai Wang
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Patent number: 10775302Abstract: 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.Type: GrantFiled: December 26, 2018Date of Patent: September 15, 2020Assignee: NUCTECH COMPANY LIMITEDInventors: Ziran Zhao, Haifan Hu, Xuming Ma, Yingxin Wang
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Publication number: 20190234870Abstract: 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.Type: ApplicationFiled: December 26, 2018Publication date: August 1, 2019Applicant: NUCTECH COMPANY LIMITEDInventors: Ziran ZHAO, Haifan Hu, Xuming Ma, Yingxin Wang
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Publication number: 20180284302Abstract: The present invention relates to the field of radiation detection, and provides a CdZnTe aerial inspection system and an inspection method. The inspection system comprises a CdZnTe spectrometer (10) and an aircraft (20). The aircraft (20) flies and carries the CdZnTe spectrometer (10) to realize a function of aerial inspection, thereby improving operating efficiency of nuclear radiation monitoring. The CdZnTe spectrometer (10) has high energy resolution, a small volume, a light weight, and desirable portability. By combining the CdZnTe spectrometer (10) and the aircraft (20), the present invention enables high measurement precision, a long operation duration, and an aerial access to a site of a nuclear accident to perform operations and inspect the site, thus reducing radiation exposure received by a person entering the site, and providing support for rescue operation.Type: ApplicationFiled: August 23, 2016Publication date: October 4, 2018Inventors: Lan ZHANG, Weizhi WANG, Yingshuai DU, Zonggui WU, Wei ZHANG, Xuming MA, Kun ZHAO, Jun LI
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Patent number: 9835739Abstract: The present invention provides a method and apparatus for processing signals of a semiconductor detector, including: acquiring a relationship of a time difference between anode and cathode signals of the semiconductor detector with an anode signal amplitude; obtaining an optimal data screening interval according to the relationship of the time difference between anode and cathode signals of the semiconductor detector with the anode signal amplitude, wherein the optimal data screening interval is an interval where the time difference between the anode and cathode signals is greater than 50 ns; and screening and processing the collected data according to the optimal data screening interval when the semiconductor detector collects data. The present invention better overcomes the inherent crystal defects of the detector, reduces the effect of background noise, increases the energy resolution of the cadmium zinc telluride detector under room temperature, and improves the peak-to-compton ratio.Type: GrantFiled: July 15, 2015Date of Patent: December 5, 2017Assignees: TSINGHUA UNIVERSITY, NUCTECH COMPANY LIMITEDInventors: Lan Zhang, Yulan Li, Yuanjing Li, Jianqiang Fu, Yingshuai Du, Wei Zhang, Xuming Ma, Jun Li
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Publication number: 20160018537Abstract: The present invention provides a method and apparatus for processing signals of a semiconductor detector, including: acquiring a relationship of a time difference between anode and cathode signals of the semiconductor detector with an anode signal amplitude; obtaining an optimal data screening interval according to the relationship of the time difference between anode and cathode signals of the semiconductor detector with the anode signal amplitude, wherein the optimal data screening interval is an interval where the time difference between the anode and cathode signals is greater than 50 ns; and screening and processing the collected data according to the optimal data screening interval when the semiconductor detector collects data. The present invention better overcomes the inherent crystal defects of the detector, reduces the effect of background noise, increases the energy resolution of the cadmium zinc telluride detector under room temperature, and improves the peak-to-compton ratio.Type: ApplicationFiled: July 15, 2015Publication date: January 21, 2016Inventors: Lan ZHANG, Yulan LI, Yuanjing LI, Jianqiang FU, Yingshuai DU, Wei ZHANG, Xuming MA, Jun LI