Patents by Inventor Yaohong Liu
Yaohong Liu 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: 11737202Abstract: 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.Type: GrantFiled: December 23, 2020Date of Patent: August 22, 2023Assignee: NUCTECH COMPANY LIMITEDInventors: Yaohong Liu, Jinsheng Liu, Wei Jia, Wei Yin, Feng Gao, Xiying Liu, Haokun Wang
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Publication number: 20220404312Abstract: The present disclosure provides a gas analysis device and a method for detecting sample gas. The gas analysis device includes: an ion mobility spectrometer including an ion mobility tube, an ion gate, a plurality of electrodes, a suppression grid, and a Faraday plate sequentially disposed in the ion mobility tube, wherein the Faraday plate is configured to receive sample ions discharged from the suppression grid, and the Faraday plate is provided with a through hole; a mass spectrometer; a gate valve disposed between the Faraday plate and an ion inlet of the mass spectrometer; and a controller configured to control an opening or closing of the gate valve to allow the sample ions discharged from the suppression grid to flow into the mass spectrometer through the through hole of the Faraday plate when the gate valve is opened.Type: ApplicationFiled: June 14, 2022Publication date: December 22, 2022Inventors: Yan Wang, Qingjun Zhang, Yuanjing Li, Zhiqiang CHEN, Jianmin Li, Yaohong Liu, Ge Li, Zhongyuan Hao, Nei Yang, Guangqin Li
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Patent number: 11476102Abstract: Embodiments of the present disclosure provide a real-time calibration device, a real-time calibration method and a detection apparatus. The real-time calibration device is in fluid communication with a sample injection pipeline of the apparatus to be calibrated. The real-time calibration device is configured to release a trace amount of calibration agent molecules during a sample injection of the apparatus to be calibrated, so that the trace amount of calibration agent molecules and a sample entering the apparatus to be calibrated are mixed and together enter the apparatus to be calibrated, and information of the sample and the calibration agent is detected by the apparatus to be calibrated, thereby performing a calibration.Type: GrantFiled: August 27, 2020Date of Patent: October 18, 2022Assignees: Nuctech Company Limited, Tsinghua UniversityInventors: Qingjun Zhang, Zhiqiang Chen, Yuanjing Li, Jianmin Li, Yinong Liu, Yaohong Liu, Guangqin Li, Weiping Zhu, Ge Li, Qiufeng Ma, Biao Cao
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Patent number: 11422070Abstract: A sampling probe, an automatic sampling device, and a container detection system are provided. The sampling probe includes: a mounting base; a housing mounted on the mounting base, a first accommodation chamber having an opening being defined in the housing, and an exhaust hole in communication with the first accommodation chamber and outside of the housing being formed in the housing; a coupling portion formed on an outer edge of the opening of the first accommodation chamber and formed to be hermetically coupled with an air outlet of a container; and a suction device mounted on the housing and configured to suck gas in the container into the first accommodation chamber through the air outlet. The sampling probe may collect the odor of toxic and harmful gases/hazardous chemicals inside the container at the air outlet of the container, without destroying the overall structure of the container.Type: GrantFiled: August 10, 2020Date of Patent: August 23, 2022Assignees: NUCTECH COMPANY LIMITED, Tsinghua UniversityInventors: Qingjun Zhang, Yuanjing Li, Zhiqiang Chen, Jianmin Li, Shangmin Sun, Yaohong Liu, Weiping Zhu, Qiufeng Ma, Ge Li, Biao Cao, Zheng Liang, Ying Li, Yu Hu
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Patent number: 11408852Abstract: A sampling tube bundle includes a tube bundle body and a joint assembly. The tube bundle body includes a gas sampling tube for transmitting sampling gas; a metal woven layer wrapping an outer circumference of the gas sampling tube; a heating pad comprising a heat tracing cable wrapping an outer circumference of the metal woven layer, for heating the sampling gas in the gas sampling tube; a flame resistant tape wound around an outer circumference of the of the heating pad; a plurality of signal transmission lines circumferentially spaced apart from one another are arranged outside the flame resistant tape; and a sheath located outside the signal transmission line. The joint assembly is arranged on an end of the tube bundle body, for connecting to an analysis device or a sampling device.Type: GrantFiled: May 8, 2019Date of Patent: August 9, 2022Assignees: TSINGHUA UNIVERSITY, Nuctech Company Limited, WUHU JIAHONG NEW MATERIAL CO., LTD.Inventors: Zhiqiang Chen, Chunan Xu, Qingjun Zhang, Fengfeng Xiong, Yuanjing Li, Ziran Zhao, Yinong Liu, Yaohong Liu, Ge Li, Qiufeng Ma, Biao Cao
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Patent number: 11400407Abstract: 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.Type: GrantFiled: December 26, 2018Date of Patent: August 2, 2022Inventors: Qingjun Zhang, Yuanjing Li, Zhiqiang Chen, Ziran Zhao, Yinong Liu, Yaohong Liu, Lili Yan, Ge Li, Qiufeng Ma, Nan Bai
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Patent number: 11346807Abstract: There are provided an ion mobility spectrometer and a sniffer. The ion mobility spectrometer includes: an ion migration tube; a sampling gas path having a sampling device configured to temporarily store a sample gas collected by a sampling head in a sampling pipe; a sample introduction gas path having two ends in communication with the gas inlet and outlet of the ion migration tube respectively, and configured to introduce a carrier gas within the ion migration tube into the sampling pipe and to carry a sample gas temporarily stored in the sampling pipe into the ion migration tube; and a valve assembly configured to only allow gas to flow from the sampling device to the sampling pipe in a sampling state, and to only allow gas to flow from the ion migration tube through the sampling pipe back to the ion migration tube in a sample introduction state.Type: GrantFiled: June 12, 2019Date of Patent: May 31, 2022Assignee: Nuctech Company LimitedInventors: Qingjun Zhang, Yuanjing Li, Zhiqiang Chen, Jianmin Li, Yinong Liu, Yaohong Liu, Lili Yan, Biao Cao, Weiping Zhu, Ge Li, Qiufeng Ma, Qi Mao, Nan Bai
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Patent number: 11346808Abstract: The present disclosure provides a trace detection device. The trace detection device includes: a box body comprising a main body frame and a top plate, the top plate and the main body frame forming a fully enclosed cavity; an ion migration tube assembly in the cavity and on a first side of the cavity; and a preamplifier and high voltage circuit board in the cavity and on a second side of the cavity, the second side being opposite to the first side.Type: GrantFiled: July 21, 2020Date of Patent: May 31, 2022Assignees: Nuctech Company Limited, Tsinghua UniversityInventors: Qingjun Zhang, Yuanjing Li, Zhiqiang Chen, Jianmin Li, Yinong Liu, Yaohong Liu, Yanqin Zhao, Lili Yan, Biao Cao, Qiufeng Ma, Ge Li
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Patent number: 11346975Abstract: 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.Type: GrantFiled: August 4, 2017Date of Patent: May 31, 2022Assignee: Nuctech Company LimitedInventors: Zhiqiang Chen, Ziran Zhao, Yaohong Liu, Jianping Gu, Qian Yi, Bicheng Liu, Guangming Xu
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Patent number: 11320407Abstract: 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.Type: GrantFiled: December 16, 2019Date of Patent: May 3, 2022Inventors: Qingjun Zhang, Yuanjing Li, Zhiqiang Chen, Weiping Zhu, Yaohong Liu, Qiufeng Ma, Ge Li, Biao Cao, Lili Yan
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Patent number: 11215626Abstract: 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.Type: GrantFiled: May 8, 2019Date of Patent: January 4, 2022Assignees: TSINGHUA UNIVERSITY, NUCTECH COMPANY LIMITEDInventors: Qingjun Zhang, Yuanjing Li, Zhiqiang Chen, Ziran Zhao, Yinong Liu, Yaohong Liu, Qiufeng Ma, Lili Yan, Weiping Zhu, Biao Cao
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Publication number: 20210404988Abstract: There are provided an ion mobility spectrometer and a sniffer. The ion mobility spectrometer includes: an ion migration tube; a sampling gas path having a sampling device configured to temporarily store a sample gas collected by a sampling head in a sampling pipe; a sample introduction gas path having two ends in communication with the gas inlet and outlet of the ion migration tube respectively, and configured to introduce a carrier gas within the ion migration tube into the sampling pipe and to carry a sample gas temporarily stored in the sampling pipe into the ion migration tube; and a valve assembly configured to only allow gas to flow from the sampling device to the sampling pipe in a sampling state, and to only allow gas to flow from the ion migration tube through the sampling pipe back to the ion migration tube in a sample introduction state.Type: ApplicationFiled: June 12, 2019Publication date: December 30, 2021Applicant: NUCTECH COMPANY LIMITEDInventors: Qingjun ZHANG, Yuanjing LI, Zhiqiang CHEN, Jianmin LI, Yinong LIU, Yaohong LIU, Lili YAN, Biao CAO, Weiping ZHU, Ge LI, Qiufeng MA, Qi MAO, Nan BAI
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Patent number: 11193860Abstract: 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.Type: GrantFiled: December 10, 2018Date of Patent: December 7, 2021Assignees: Nuctech Company Limited, Tsinghua UniversityInventors: Qingjun Zhang, Yuanjing Li, Zhiqiang Chen, Ziran Zhao, Yinong Liu, Yaohong Liu, Lili Yan, Ge Li, Qiufeng Ma
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Patent number: 11183354Abstract: The present disclosure provides a drawer-type carrying device for an accelerator and an cabin structure for the accelerator, the drawer-type carrying device for the accelerator includes a frame mechanism and a drawing mechanism. The frame mechanism is used for installing the accelerator; the drawing mechanism is connected with the frame mechanism and the frame mechanism is movable relative to the drawing mechanism. The cabin structure for the accelerator includes a cabin, a shielding mechanism and a drawer-type carrying device for the accelerator. The cabin has a working area and a maintenance area. The shielding mechanism is disposed in the working area and has a side opening door facing towards the maintenance area. The frame mechanism is capable of drawn from the shielding mechanism into the maintenance area when the side opening door is opened.Type: GrantFiled: December 24, 2018Date of Patent: November 23, 2021Assignee: NUCTECH COMPANY LIMITEDInventors: Yaohong Liu, Liang Zhang, Xiaotong Zhang
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Patent number: 11152932Abstract: The disclosed technology relates to a gate protection circuit for an Insulated Gate Bipolar Transistor (IGBT), the IGBT being used as a switch device in a solid state pulse modulator based on the MARX generator principle, the gate protection circuit including: a voltage regulator configured to supply a stable voltage to an emitter of the IGBT with respect to the ground for a gate of the IGBT.Type: GrantFiled: August 23, 2018Date of Patent: October 19, 2021Assignee: Nuctech Company LimitedInventors: Yaohong Liu, Ziran Zhao, Jinsheng Liu, Wei Jia, Wei Li, Xinshui Yan
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Publication number: 20210215582Abstract: 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.Type: ApplicationFiled: December 10, 2018Publication date: July 15, 2021Inventors: Qingjun ZHANG, Yuanjing LI, Zhiqiang CHEN, Ziran ZHAO, Yinong LIU, Yaohong LIU, Lili YAN, Ge LI, Qiufeng MA
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Patent number: 11054542Abstract: Embodiments of the disclosure provide a multi-ray-source accelerator and an inspection method. The multi-ray-source accelerator includes: a plurality of acceleration tubes, each acceleration tube of the plurality of acceleration tubes including an acceleration tube body that defines at least one cavity, the plurality of acceleration tubes being arranged in at least one row along a straight line or an arc and connected in series with each other; and a microwave unit configured to provide a microwave field to the plurality of acceleration tubes. The plurality of acceleration tubes are arranged to allow the microwave unit to provide the microwave field from an acceleration tube at one end of the plurality of acceleration tubes so as to accelerate electron beams in cavities of all the acceleration tubes.Type: GrantFiled: July 13, 2020Date of Patent: July 6, 2021Assignees: Tsinghua University, Nuctech Company LimitedInventors: Kejun Kang, Huaibi Chen, Yaohong Liu, Chuanxiang Tang, Yuanjing Li, Hao Zha, Liang Zhang
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Publication number: 20210204390Abstract: 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.Type: ApplicationFiled: December 23, 2020Publication date: July 1, 2021Inventors: Yaohong LIU, Jinsheng LIU, Wei JIA, Wei YIN, Feng GAO, Xiying LIU, Haokun WANG
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Patent number: 11022569Abstract: A low-angle self-swinging type computed tomography (CT) device is provided, having an X-ray accelerator and a plurality of rows of detectors and includes a slip ring, such that the slip ring with the accelerator and the detectors thereon is capable of performing a single-pendulum reciprocating movement while an object to be inspected passes through the slip ring, a three-dimensional CT image of the object is displayed, thereby achieving accurate inspection for large-scale objects, such as van containers.Type: GrantFiled: July 9, 2018Date of Patent: June 1, 2021Assignee: NUCTECH COMPANY LIMITEDInventors: Kejun Kang, Zhiqiang Chen, Yuanjing Li, Li Zhang, Ziran Zhao, Yaohong Liu, Jianping Gu, Liang Li, Yuxiang Xing
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Patent number: 11026319Abstract: Embodiments of the present disclosure disclose a multi-output high-voltage power supply including a channel selection circuit (103) including a plurality of switches; and a high-voltage power supply module (101) connected to the channel selection circuit (103), wherein the high-voltage power supply module (101) includes a fine adjusting power supply component (110) and a plurality of coarse adjusting power supply components (120-1 to 120-N) connected in series, wherein one high-voltage output terminal of the high-voltage power supply module (101) is connected to a common terminal of the channel selection circuit (103), and the other high-voltage output terminal of the high-voltage power supply module (101) is grounded through a current sampling resistor.Type: GrantFiled: December 26, 2019Date of Patent: June 1, 2021Assignees: Tsinghua University, NUCTECH COMPANY LIMITED, NuRay Technology Co., LtdInventors: Yuanjing Li, Yaohong Liu, Huaping Tang, Jinsheng Liu, Xiying Liu, Zhanfeng Qin, Wei Jia, Jinsong Pan