Patents by Inventor Wenguo Liu
Wenguo 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: 11266000Abstract: The present disclosure provides an X-ray tube device and a spring pin for an X-ray tube device. In an embodiment, the X-ray tube device includes: an outer cylinder assembly having an anode end and a cathode end, an anode end cap assembly provided at the anode end of the outer cylinder assembly and including an X-ray tube, a cathode end cap assembly provided at the cathode end of the outer cylinder assembly and including a high voltage receptacle for an external power supply, and a spring pin connection assembly provided in the outer cylinder assembly and connecting a filament lead of the X-ray tube to the high voltage receptacle.Type: GrantFiled: April 4, 2018Date of Patent: March 1, 2022Assignee: Nuctech Company LimitedInventors: Zhiqiang Chen, Wanlong Wu, Fuhua Ding, Wenguo Liu, Zhimin Zheng, Shuo Cao
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Patent number: 11226429Abstract: An extensible millimeter wave security inspection system, a security inspection method for a human body using the extensible millimeter wave security inspection system and an extensible millimeter wave scanning unit are disclosed. The extensible millimeter wave security inspection system includes at least one security inspection passage, at least one scanning units are provided on at least one side of two sides of each security inspection passage, each scanning unit includes at least one millimeter wave transceiving module, the millimeter wave transceiving module includes an array of millimeter wave antennas configured to transmit and receive millimeter wave signals and a millimeter wave transceiver associated with the array of millimeter wave antennas, and the millimeter wave transceiving module is arranged to scan by millimeter wave a target to be inspected in the security inspection passage along a direction in which the security inspection passage extends.Type: GrantFiled: March 8, 2019Date of Patent: January 18, 2022Assignee: Nuctech Company LimitedInventors: Zhiqiang Chen, Ziran Zhao, Yuanjing Li, Xilei Luo, Yingkang Jin, Zhimin Zheng, Wanlong Wu, Lingbo Qiao, Wenguo Liu
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Publication number: 20210204385Abstract: The present disclosure provides an X-ray tube device and a spring pin for an X-ray tube device. In an embodiment, the X-ray tube device includes: an outer cylinder assembly having an anode end and a cathode end, an anode end cap assembly provided at the anode end of the outer cylinder assembly and including an X-ray tube, a cathode end cap assembly provided at the cathode end of the outer cylinder assembly and including a high voltage receptacle for an external power supply, and a spring pin connection assembly provided in the outer cylinder assembly and connecting a filament lead of the X-ray tube to the high voltage receptacle.Type: ApplicationFiled: April 4, 2018Publication date: July 1, 2021Inventors: Zhiqiang CHEN, Wanlong WU, Fuhua DING, Wenguo LIU, Zhimin ZHENG, Shuo CAO
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Publication number: 20200209384Abstract: 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.Type: ApplicationFiled: November 14, 2019Publication date: July 2, 2020Applicant: Nuctech Company LimitedInventors: Ziran Zhao, Zhimin Zheng, Lingbo Qiao, Yingkang Jin, Wenguo Liu
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Publication number: 20190277999Abstract: An extensible millimeter wave security inspection system, a security inspection method for a human body using the extensible millimeter wave security inspection system and an extensible millimeter wave scanning unit are disclosed. The extensible millimeter wave security inspection system includes at least one security inspection passage, at least one scanning units are provided on at least one side of two sides of each security inspection passage, each scanning unit includes at least one millimeter wave transceiving module, the millimeter wave transceiving module includes an array of millimeter wave antennas configured to transmit and receive millimeter wave signals and a millimeter wave transceiver associated with the array of millimeter wave antennas, and the millimeter wave transceiving module is arranged to scan by millimeter wave a target to be inspected in the security inspection passage along a direction in which the security inspection passage extends.Type: ApplicationFiled: March 8, 2019Publication date: September 12, 2019Inventors: Zhiqiang CHEN, Ziran ZHAO, Yuanjing LI, Xilei LUO, Yingkang JIN, Zhimin ZHENG, Wanlong WU, Lingbo QIAO, Wenguo LIU
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Patent number: 10218082Abstract: There is provided a wideband patch antenna and an antenna array. The antenna includes a dielectric substrate of a rectangle shape, a radiation patch formed on a top surface of the dielectric substrate, a coupling patch formed on the top surface of the dielectric substrate and extending from a side of the dielectric substrate to a position from the radiation patch by a distance, a metal support arranged on the lower surface of the dielectric substrate and extending from the edge of the lower surface of the dielectric substrate downward to the ground, a layer of air having a predetermined thickness being formed between the lower surface of the dielectric substrate and the ground. According to the embodiments, it is possible to improve the directivity of the wideband microstrip antenna while maintaining its small size.Type: GrantFiled: April 7, 2014Date of Patent: February 26, 2019Assignees: Nuctech Company Limited, Tsinghua UniversityInventors: Ziran Zhao, Zhiqiang Chen, Yuanjing Li, Wanlong Wu, Yinong Liu, Jieqing Yang, Wenguo Liu, Bin Sang, Lei Zheng
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Patent number: 9577651Abstract: A circuit to generate a sweep frequency signal that includes a reference frequency source to generate a reference frequency signal, a first frequency combination circuit coupled to the reference frequency source, and operative to generate a sweep frequency signal in a first frequency band based on the reference frequency signal, a second frequency combination circuit coupled to the reference frequency source, and operative to generate a sweep frequency signal in a second frequency band different from the first frequency band based on the reference frequency signal, a multiple-level switch coupled to outputs of the first frequency combination circuit and the second frequency combination circuit, and a control circuit controlling the first and second frequency combination circuits and the multiple-level switch to output the sweep frequency signal in the first frequency band and the sweep frequency signal in the second frequency band at an output of the multiple-level switch alternately.Type: GrantFiled: June 3, 2014Date of Patent: February 21, 2017Assignee: NUCTECH COMPANY LIMITEDInventors: Ziran Zhao, Wenguo Liu, Zhiqiang Chen, Yuanjing Li, Wanlong Wu, Yinong Liu, Bin Sang, Lei Zheng
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Patent number: 9552521Abstract: The present invention provides a human body security inspection method and system. The method comprises: retrieving in real-time scanning row or column image data of a personal to be inspected; transmitting in real-time the image data to an algorithm processing module and processing these image data by the module; automatically recognizing a suspicious matter by a suspicious matter automatic target recognition technique, after retrieving an image data of an entire scanning image of the personal; any of the following three inspection modes is selected, so as to perform a further processing on basis of the recognition result of the suspicious matter, (1) in a manner of automatic target recognition technique, (2) in a combination manner of the automatic target recognition technique and a privacy protection image; and (3) a combination manner of the automatic target recognition technique, a privacy protection image and human intervention.Type: GrantFiled: July 21, 2014Date of Patent: January 24, 2017Assignees: Tsinghua University, Nuctech Company LimitedInventors: Zhiqiang Chen, Yuanjing Li, Ziran Zhao, Wanlong Wu, Yingkang Jin, Yinong Liu, Wenguo Liu, Xianli Ding, Bin Sang, Le Tang, Ming Ruan, Chenguang Zhu, Liaohua Fu, Fuhua Ding, Shuo Cao
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Patent number: 9478864Abstract: There is provided a waveguide horn array, a method for forming the waveguide horn array, and an antenna system. The array includes a rectangular metal plate which is processed to have a cross section comprised of a plurality of rectangular holes arranged in the length direction of the rectangular metal plate, the lower part of each hole being formed as a rectangular waveguide, and the upper part of each hole being formed as a horn; and a groove extending in the direction along which the plurality of holes are arranged and having a predetermined depth, which is formed at two sides of the holes on the top surface of the rectangular metal plate. According to the embodiments, it is possible to maintain the good properties of the antenna in terms of bandwidth and directivity, while enhancing the isolation between the transmitting antenna and the receiving antenna in the system.Type: GrantFiled: May 22, 2014Date of Patent: October 25, 2016Assignees: Tsinghua University, Nuctech Company LimitedInventors: Ziran Zhao, Zhiqiang Chen, Yuanjing Li, Wanlong Wu, Jieqing Yang, Wenguo Liu, Xilei Luo, Bin Sang, Lei Zheng
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Publication number: 20160294070Abstract: There is provided a wideband patch antenna and an antenna array. The antenna includes a dielectric substrate of a rectangle shape, a radiation patch formed on a top surface of the dielectric substrate, a coupling patch formed on the top surface of the dielectric substrate and extending from a side of the dielectric substrate to a position from the radiation patch by a distance, a metal support arranged on the lower surface of the dielectric substrate and extending from the edge of the lower surface of the dielectric substrate downward to the ground, a layer of air having a predetermined thickness being formed between the lower surface of the dielectric substrate and the ground. According to the embodiments, it is possible to improve the directivity of the wideband microstrip antenna while maintaining its small size.Type: ApplicationFiled: April 7, 2014Publication date: October 6, 2016Inventors: Ziran ZHAO, Zhiqiang CHEN, Yuanjing LI, Wanlong WU, Yinong LIU, Jieqing YANG, Wenguo LIU, Bin SANG, Lei ZHENG
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Publication number: 20150323664Abstract: A millimeter wave three dimensional holographic scan imaging apparatus and a method for inspecting a human body or an article are disclosed. In one aspect, the apparatus includes a first and second millimeter wave transceiver module. The apparatus also includes a guide rail device for each millimeter wave transceiver module. Each guide rail is connected to its respective transceiver module in slidable form. A driver drives each millimeter wave transceiver module to move along its guide rail device. Each millimeter wave transceiver module performs plane scans on the human body or article being inspected. A data processing device generates a millimeter wave holographic image from the plane scans.Type: ApplicationFiled: August 4, 2014Publication date: November 12, 2015Inventors: Wanlong Wu, Zhiqiang Chen, Yuanjing Li, Ziran Zhao, Zongjun Shen, Yinong Liu, Bin Sang, Wenguo Liu
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Publication number: 20150048984Abstract: There is provided a waveguide horn array, a method for forming the waveguide horn array, and an antenna system. The array includes a rectangular metal plate which is processed to have a cross section comprised of a plurality of rectangular holes arranged in the length direction of the rectangular metal plate, the lower part of each hole being formed as a rectangular waveguide, and the upper part of each hole being formed as a horn; and a groove extending in the direction along which the plurality of holes are arranged and having a predetermined depth, which is formed at two sides of the holes on the top surface of the rectangular metal plate. According to the embodiments, it is possible to maintain the good properties of the antenna in terms of bandwidth and directivity, while enhancing the isolation between the transmitting antenna and the receiving antenna in the system.Type: ApplicationFiled: May 22, 2014Publication date: February 19, 2015Inventors: Ziran ZHAO, Zhiqiang CHEN, Yuanjing LI, Wanlong WU, Jieqing YANG, Wenguo LIU, Xilei LUO, Bin SANG, Lei ZHENG
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Publication number: 20150048868Abstract: A circuit to generate a sweep frequency signal that includes a reference frequency source to generate a reference frequency signal, a first frequency combination circuit coupled to the reference frequency source, and operative to generate a sweep frequency signal in a first frequency band based on the reference frequency signal, a second frequency combination circuit coupled to the reference frequency source, and operative to generate a sweep frequency signal in a second frequency band different from the first frequency band based on the reference frequency signal, a multiple-level switch coupled to outputs of the first frequency combination circuit and the second frequency combination circuit, and a control circuit controlling the first and second frequency combination circuits and the multiple-level switch to output the sweep frequency signal in the first frequency band and the sweep frequency signal in the second frequency band at an output of the multiple-level switch alternately.Type: ApplicationFiled: June 3, 2014Publication date: February 19, 2015Inventors: Ziran ZHAO, Wenguo LIU, Zhiqiang CHEN, Yuanjing Ll, Wanlong WU, Yinong LIU, Bin SANG, Lei ZHENG
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Publication number: 20150030205Abstract: The present invention provides a human body security inspection method and system. The method comprises: retrieving in real-time scanning row or column image data of a personal to be inspected; transmitting in real-time the image data to an algorithm processing module and processing these image data by the module; automatically recognizing a suspicious matter by a suspicious matter automatic target recognition technique, after retrieving an image data of an entire scanning image of the personal; any of the following three inspection modes is selected, so as to perform a further processing on basis of the recognition result of the suspicious matter, (1) in a manner of automatic target recognition technique, (2) in a combination manner of the automatic target recognition technique and a privacy protection image; and (3) a combination manner of the automatic target recognition technique, a privacy protection image and human intervention.Type: ApplicationFiled: July 21, 2014Publication date: January 29, 2015Inventors: Zhiqiang CHEN, Yuanjing LI, Ziran ZHAO, Wanlong WU, Yingkang JIN, Yinong LIU, Wenguo LIU, Xianli DING, Bin SANG, Le TANG, Ming RUAN, Chenguang ZHU, Liaohua FU, Fuhua DING, Shuo CAO
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Publication number: 20140185763Abstract: An inspection system included a ray source to emit a ray, a detector to receive the ray, a detection region for placing an object under inspection, and a moving device to move the ray source and the detector around the detection region. Conventional scanning blind zones such as both sides of a human body, both sides of arms and both sides of legs can be completely eliminated. In addition, it is not necessary for a human body under inspection to carry out an action such as turning around to change his or her posture. Therefore, ineffective time can be minimized in the entire detection and a passing rate of persons under inspection can be improved. Furthermore, an inspected person's mental feeling of being controlled due to change of posture can be greatly improved, and his or her mental discomfort and conflicted moods can be reduced.Type: ApplicationFiled: December 20, 2013Publication date: July 3, 2014Applicants: TSINGHUA UNIVERSITY, NUCTECH COMPANY LIMITEDInventors: Zhiqiang CHEN, Yuanjing LI, Ziran ZHAO, Wanlong WU, Le TANG, Yinong LIU, Yingkang JIN, Guangwei DING, Shuo CAO, Zhimin ZHENG, Wenguo LIU, Wentao YU, Yi ZHOU
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Publication number: 20140185772Abstract: The invention discloses a human body inspection system comprising: an X-rays source for emitting X-rays to a human body to be inspected; a modulation and collimation device for modulating and collimating the X-rays from the X-rays source; a detector that receives X-rays scattered from the human body to be inspected; a guiding rail forming an enclosed detection region, wherein the human body to be inspected is in the detection region, and the X-rays source, the modulation and collimation device and the detector are positioned in a same side relative to the human body, and the X-rays source, the modulation and collimation device and the detector together move along the guiding rail in whole so that the X-rays can scan all over the human body.Type: ApplicationFiled: December 20, 2013Publication date: July 3, 2014Inventors: Zhiqiang CHEN, Yuanjing LI, Ziran ZHAO, Wanlong WU, Le TANG, Yinong LIU, Yingkang JIN, Wenguo LIU, Shuo CAO, Zhimin ZHENG, Guangwei DING, Wentao YU, Yi ZHOU
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Publication number: 20140185773Abstract: A human body security inspection system including a plurality of ray emitting-detecting modules, which are configured to emit X-rays to the object to be inspected and to receive X-rays scattered from the object to be inspected, wherein the ray emitting-detecting modules form an enclosed region with respect to the object to be inspected and security inspection is implemented on the object in the enclosed region.Type: ApplicationFiled: December 20, 2013Publication date: July 3, 2014Applicants: TSINGHUA UNIVERSITY, NUCTECH COMPANY LIMITEDInventors: Zhiqiang Chen, Yuanjing LI, Ziran ZHAO, Wanlong WU, Le TANG, Yinong LIU, Yingkang JIN, Wenguo LIU, Shuo CAO, Zhimin ZHENG, Guangwei DING, Ming RUAN, Xiuwei CHEN
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Patent number: 7660387Abstract: The present invention discloses an radiation imaging system, comprising: an accelerator for generating rays which penetrate through the objects to be inspected and an synchronous signal; a detector with a plurality of detecting modules, adapted for detecting rays; a signal processor for generating a selection signal according to the synchronous signal, so as to select a detecting module for detecting the rays; a data converter for converting the signal detected by said detecting module into digital data, and then buffering the digital data in said signal processor; and a communication controller connected to an image processor, adapted for transmitting the digital data buffered in said signal processor to said image processor. The system according to the present invention allows high-speed and stable data acquisition and data conversion and accurate and reliable data transmission, when the data amount is significant.Type: GrantFiled: July 1, 2008Date of Patent: February 9, 2010Assignees: Tsinghua University, Nuctech Company LimitedInventors: Kejun Kang, Zhiqiang Chen, Yuanjing Li, Liming Wang, Yinong Liu, Shangmin Sun, Li Zhang, Yaohong Liu, Guang Yang, Qingjun Zhang, Wenguo Liu, Siyuan Liang, Zhenbin Guo, Bin Hu, Yanli Deng, Yucheng Wu
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Publication number: 20090010387Abstract: The present invention discloses an radiation imaging system, comprising: an accelerator for generating rays which penetrate through the objects to be inspected and an synchronous signal; a detector with a plurality of detecting modules, adapted for detecting rays; a signal processor for generating a selection signal according to the synchronous signal, so as to select a detecting module for detecting the rays; a data converter for converting the signal detected by said detecting module into digital data, and then buffering the digital data in said signal processor; and a communication controller connected to an image processor, adapted for transmitting the digital data buffered in said signal processor to said image processor. The system according to the present invention allows high-speed and stable data acquisition and data conversion and accurate and reliable data transmission, when the data amount is significant.Type: ApplicationFiled: July 1, 2008Publication date: January 8, 2009Inventors: Kejun Kang, Zhiqiang Chen, Yuanjing Li, Liming Wang, Yinong Liu, Shangmin Sun, Li Zhang, Yaohong Liu, Guang Yang, Qingjun Zhang, Wenguo Liu, Siyuan Liang, Zhenbin Guo, Bin Hu, Yanli Deng, Yucheng Wu