Patents by Inventor Yanwei Xu
Yanwei Xu 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: 10337960Abstract: A method and a system for fast inspecting a vehicle based on a length measuring device, including: when a subject vehicle enters an inspection region, measuring a first length and a second length of the subject vehicle; determining whether the first length and the second length is respectively larger than or equal to a preset second length threshold; if so, determining whether a gap portion of the subject vehicle between a first portion and a second portion of the subject vehicle appears in a beam emitting region formed by a beam of radiation rays emitted by the system for fast inspecting a vehicle; and when the gap portion appears in the beam emitting region, emitting a beam of radiation rays of a first radiation dose to the subject vehicle according to the gap portion, wherein the subject vehicle moves with respect to the system for fast inspecting a vehicle.Type: GrantFiled: September 28, 2016Date of Patent: July 2, 2019Assignee: NUCTECH COMPANY LIMITEDInventors: Yanwei Xu, Weifeng Yu
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Patent number: 10204268Abstract: The present disclosure provides a method and system for identifying a train number and train type. The method includes: continuously photographing a train under inspection by using a linear-array camera in motion relative to the train under inspection, and generating a plurality of partial images of the train; splicing the plurality of partial images of the train; correcting distortion of the spliced image; identifying a train number from the corrected image; wherein the correcting distortion of the spliced image includes: extracting a contour of a wheel from the spliced image; obtaining a ratio between a horizontal diameter and a vertical diameter of the wheel from the contour; if the ratio is greater than a first preset threshold, horizontally compressing the spliced image according to the ratio; and if the ratio is smaller than a second preset threshold, horizontally stretching the spliced image.Type: GrantFiled: September 29, 2016Date of Patent: February 12, 2019Assignee: NUCTECH COMPANY LIMITEDInventors: Yanwei Xu, Weifeng Yu
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Patent number: 10169674Abstract: A vehicle type recognition method based on a laser scanner is provided, the method comprising steps of: detecting that a vehicle to be checked has entered into a recognition area; causing a laser scanner to move relative to the vehicle to be checked; scanning the vehicle to be checked using the laser scanner on a basis of columns, and storing and splicing data of each column obtained by scanning to form a three-dimensional image of the vehicle to be checked, wherein a lateral width value is specified for each single column of data; specifying a height difference threshold; and determining a height difference between the height at the lowest position of the vehicle to be checked in data of column N and the height at the lowest position of the vehicle to be checked in data of specified number of columns preceding and/or succeeding to the column N.Type: GrantFiled: June 28, 2018Date of Patent: January 1, 2019Assignee: NUCTECH COMPANY LIMITEDInventors: Shangmin Sun, Yanwei Xu, Qiang Li, Weifeng Yu, Yu Hu
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Publication number: 20180322358Abstract: A vehicle type recognition method based on a laser scanner is provided, the method comprising steps of: detecting that a vehicle to be checked has entered into a recognition area; causing a laser scanner to move relative to the vehicle to be checked; scanning the vehicle to be checked using the laser scanner on a basis of columns, and storing and splicing data of each column obtained by scanning to form a three-dimensional image of the vehicle to be checked, wherein a lateral width value is specified for each single column of data; specifying a height difference threshold; and determining a height difference between the height at the lowest position of the vehicle to be checked in data of column N and the height at the lowest position of the vehicle to be checked in data of specified number of columns preceding and/or succeeding to the column N.Type: ApplicationFiled: June 28, 2018Publication date: November 8, 2018Applicant: NUCTECH COMPANY LIMITEDInventors: Shangmin SUN, Yanwei Xu, Qiang Li, Weifeng Yu, Yu Hu
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Patent number: 10108881Abstract: The present disclosure relates to a train type identification method and system, and a security inspection system and system. The train type identification method includes: continuously photographing a to-be-inspected train by using a linearity camera in motion relative to the to-be-inspected train, and generating a plurality of train sub-images; splicing the plurality of train sub-images to acquire a train image of the to-be-inspected train; extracting at least one train characteristic parameter from the train image; comparing the at least one train characteristic parameter with a prestored train type template; and automatically determining a type of the to-be-inspected train based on a comparison result.Type: GrantFiled: September 28, 2016Date of Patent: October 23, 2018Assignee: NUCTECH COMPANY LIMITEDInventors: Yanwei Xu, Weifeng Yu
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Patent number: 10074026Abstract: A vehicle type recognition method based on a laser scanner is provided, the method includes detecting that a vehicle to be checked has entered into a recognition area; causing a laser scanner to move relative to the vehicle to be checked; scanning the vehicle to be checked using the laser scanner on a basis of columns, and storing and splicing data of each column obtained by scanning to form a three-dimensional image of the vehicle to be checked, wherein a lateral width value is specified for each single column of data; specifying a height difference threshold; and determining a height difference between the height at the lowest position of the vehicle to be checked in data of column N and the height at the lowest position of the vehicle to be checked in data of specified number of columns preceding and/or succeeding to the column N.Type: GrantFiled: December 17, 2015Date of Patent: September 11, 2018Assignee: NUCTECH COMPANY LIMITEDInventors: Shangmin Sun, Yanwei Xu, Qiang Li, Weifeng Yu, Yu Hu
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Patent number: 10036626Abstract: Embodiments of the invention disclose a vehicle guidance system, a method for orientating a vehicle, and an inspection vehicle. The vehicle guidance system includes at least two separate reference devices; a laser scanner device, configured to emit a laser beam signals and scan a sectorial region with the laser beam so as to measure a distance of a straight connection line for connecting the laser scanner device to any of the at least two separate reference devices, and an angle between the corresponding straight connection line and a vehicle body of the vehicle, or an angle between the straight connection lines; a processor, configured to process and store data, and to determine whether the orientation of the vehicle body in real time is deviating from an initial orientation of the vehicle body upon the system starts to operate or not, in accordance with the sensed results by the laser scanner device.Type: GrantFiled: September 30, 2016Date of Patent: July 31, 2018Assignee: NUCTECH COMPANY LIMITEDInventors: Yanwei Xu, Defang Meng, Weifeng Yu
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Publication number: 20180182126Abstract: The present disclosure discloses a method and system for identifying a part of a vehicle and a vehicle inspection system. The method includes: acquiring a vehicle body image sequence of a vehicle to be identified; reconstructing the vehicle body by using a first vehicle body reconstruction model generated through a deep learning algorithm and on the basis of the vehicle body image sequence, so as to acquire a vehicle body reconstruction image of the vehicle to be identified; and identifying a boundary identifier of the vehicle to be identified on the basis of the vehicle body reconstruction image of the vehicle to be identified.Type: ApplicationFiled: December 22, 2017Publication date: June 28, 2018Inventors: Yanwei XU, Zheng HU, Yongming WANG, Chuan GAO, Weifeng YU, Qiang LI, Yuan MA, Jianping GU, Yu HU, Shangmin SUN
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Publication number: 20180149769Abstract: A mobile scanning inspection system, comprising a vehicle body and an inspection arm including a cross arm and a vertical arm, wherein a first inspection device and a second inspection device are provided on the cross arm; the first inspection device is on the side close to the vehicle body and it emits a first laser inspection plane parallel to the side plane of the vehicle body, and the length of the longest portion of the first laser inspection plane is longer than the length of the vehicle body; the second inspection device is provided on the side close to the vertical arm and it emits a second laser inspection plane parallel to the side plane of the vehicle body and the second laser inspection plane is centered on the vertical arm, and extends a first preset distance and a second preset distance forward and backward.Type: ApplicationFiled: October 31, 2017Publication date: May 31, 2018Inventors: Tao JIANG, Yanwei XU, Shangmin SUN, Yu HU, Weifeng YU, Xuejing YANG, Youai YU, Ke LI, Defang MENG
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Publication number: 20170266273Abstract: Provided are a recombinant adeno-associated virus (AAV) vector carrying human papillomavirus type 16 (HPV-16) mutation E7 antigen gene and a construction method therefor. The construction method comprises mutating the carcinogenic HPV-16 E7 antigen gene to noncarcinogenic E7 antigen gene, and then inserting the mutated gene into an AAV vector of which the structural gene has been removed, thereby obtaining the recombinant AAV vector. The recombinant AAV vector or related product can be used for preparing medications against HPV-16 infection and other diseases such as tumors caused by HPV-16 infection.Type: ApplicationFiled: August 12, 2015Publication date: September 21, 2017Inventors: Yong LIU, Qiaolin CHEN, Zhaopeng ZENG, Wenjuan DONG, Hongji GAO, Yanhao GONG, Sha MENG, Yanwei XU, Hui ZHANG, Jing LU
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Publication number: 20170237949Abstract: The present disclosure provides a method of identifying a container number, including: arranging an image acquiring device along a passageway through which a container will pass, the image acquiring device comprising a trigger unit and a plurality of image acquiring units, at least two image acquiring units of the plurality of image acquiring units being adapted to respectively acquire images of the container numbers on at least two surfaces of a plurality of surfaces of the container passing through the passageway; acquiring the images of the container numbers on the at least two surfaces respectively by the at least two image acquiring units based on a signal from the trigger unit; and identifying the container number at least based on the images or data from the at least two image acquiring units about the container number. The present disclosure also relates to a system of identifying a container number.Type: ApplicationFiled: November 6, 2015Publication date: August 17, 2017Inventors: Yongming WANG, Yanwei XU, Weifeng YU
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Publication number: 20170184392Abstract: Embodiments of the invention disclose a vehicle guidance system, a method for orientating a vehicle, and an inspection vehicle. The vehicle guidance system includes at least two separate reference devices; a laser scanner device, configured to emit a laser beam signals and scan a sectorial region with the laser beam so as to measure a distance of a straight connection line for connecting the laser scanner device to any of the at least two separate reference devices, and an angle between the corresponding straight connection line and a vehicle body of the vehicle, or an angle between the straight connection lines; a processor, configured to process and store data, and to determine whether the orientation of the vehicle body in real time is deviating from an initial orientation of the vehicle body upon the system starts to operate or not, in accordance with the sensed results by the laser scanner device.Type: ApplicationFiled: September 30, 2016Publication date: June 29, 2017Inventors: Yanwei XU, Defang MENG, Weifeng YU
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Publication number: 20170186172Abstract: The present disclosure provides a method and system for identifying a train number and train type. The method includes: continuously photographing a train under inspection by using a linear-array camera in motion relative to the train under inspection, and generating a plurality of partial images of the train; splicing the plurality of partial images of the train; correcting distortion of the spliced image; identifying a train number from the corrected image; wherein the correcting distortion of the spliced image includes: extracting a contour of a wheel from the spliced image; obtaining a ratio between a horizontal diameter and a vertical diameter of the wheel from the contour; if the ratio is greater than a first preset threshold, horizontally compressing the spliced image according to the ratio; and if the ratio is smaller than a second preset threshold, horizontally stretching the spliced image.Type: ApplicationFiled: September 29, 2016Publication date: June 29, 2017Inventors: Yanwei XU, Weifeng YU
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Publication number: 20170160168Abstract: A method and a system for fast inspecting a vehicle based on a length measuring device, including: when a subject vehicle enters an inspection region, measuring a first length and a second length of the subject vehicle; determining whether the first length and the second length is respectively larger than or equal to a preset second length threshold; if so, determining whether a gap portion of the subject vehicle between a first portion and a second portion of the subject vehicle appears in a beam emitting region formed by a beam of radiation rays emitted by the system for fast inspecting a vehicle; and when the gap portion appears in the beam emitting region, emitting a beam of radiation rays of a first radiation dose to the subject vehicle according to the gap portion, wherein the subject vehicle moves with respect to the system for fast inspecting a vehicle.Type: ApplicationFiled: September 28, 2016Publication date: June 8, 2017Inventors: Yanwei XU, Weifeng YU
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Publication number: 20170160304Abstract: The present disclosure relates to a method and a device for monitoring a state of a moving object and a system for fast inspecting a vehicle. The method and a device for monitoring a state of a moving object positions and measures speed of the moving object by using a laser scanner. The device includes: a laser scanner configured to monitor at least one moving object entering a monitoring region, by emitting a plurality of laser beams of different angles to the at least one moving object with a preset scanning frequency; and a processing unit configured to, for each moving object, determine and output a relative position of the moving object with respect to the laser scanner at each time instance. It can significantly improve the accuracy of measuring a low speed of the moving object, and the laser scanner is easy to install and has a low cost.Type: ApplicationFiled: September 28, 2016Publication date: June 8, 2017Inventors: Junjie TU, Yanwei XU, Weifeng YU, Yongming WANG
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Publication number: 20170161586Abstract: The present disclosure relates to a train type identification method and system, and a security inspection system and system. The train type identification method includes: continuously photographing a to-be-inspected train by using a linearity camera in motion relative to the to-be-inspected train, and generating a plurality of train sub-images; splicing the plurality of train sub-images to acquire a train image of the to-be-inspected train; extracting at least one train characteristic parameter from the train image; comparing the at least one train characteristic parameter with a prestored train type template; and automatically determining a type of the to-be-inspected train based on a comparison result.Type: ApplicationFiled: September 28, 2016Publication date: June 8, 2017Inventors: Yanwei XU, Weifeng YU
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Publication number: 20170024423Abstract: A method is provided for webpage pre-reading. The method includes obtaining visiting information during a period of time for multiple webpages of each user from a plurality of users including a current user; determining respective similarity values between the current user and the plurality of users based on the visiting information; determining one or more most-similar users based on the similarity values; and when the current user is browsing a current webpage, predicting a target webpage to be accessed by the most-similar users as a target webpage for the current user and pre-reading the target webpage.Type: ApplicationFiled: July 15, 2016Publication date: January 26, 2017Inventors: JIE LIANG, YUXIN JIANG, WENQING YAO, HUOCHENG WU, YANWEI XU
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Publication number: 20170013072Abstract: The present invention provides a webpage pre-reading method, apparatus and a smart terminal device. The webpage pre-reading method includes: acquiring information of one or more users accessing multiple webpages within a first period of time; determining click paths through each of which a second webpage is clicked and entered from a first webpage and the number of clicks thereof; determining a first confidence value of each click path; generating a first pre-reading list including the click paths based on the first confidence values; and querying for a click path of a currently browsed webpage from the first pre-reading list so as to pre-read data of a corresponding target webpage to be browsed.Type: ApplicationFiled: July 8, 2016Publication date: January 12, 2017Inventors: Jie LIANG, Yuxin JIANG, Wenqing YAO, Huocheng WU, Yanwei XU, Yanjun LIANG, Yan LU, Jiawei QIU
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Publication number: 20160180186Abstract: A vehicle type recognition method based on a laser scanner is provided, the method includes detecting that a vehicle to be checked has entered into a recognition area; causing a laser scanner to move relative to the vehicle to be checked; scanning the vehicle to be checked using the laser scanner on a basis of columns, and storing and splicing data of each column obtained by scanning to form a three-dimensional image of the vehicle to be checked, wherein a lateral width value is specified for each single column of data; specifying a height difference threshold; and determining a height difference between the height at the lowest position of the vehicle to be checked in data of column N and the height at the lowest position of the vehicle to be checked in data of specified number of columns preceding and/or succeeding to the column N.Type: ApplicationFiled: December 17, 2015Publication date: June 23, 2016Inventors: Shangmin Sun, Yanwei Xu, Qiang Li, Weifeng Yu, Yu Hu
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Patent number: 8509969Abstract: The present invention relates to a method and system for automatically identifying various information of a train. The method comprises using sensors to collect wheelbase information, processing the information by signal data processing devices, thereby providing information of a train, namely: arranging a plurality of sensors along the rail in the incoming direction of the train, dividing the sensors into at least three groups, each group comprising at least two sensors; analyzing and processing the signal data stream obtained from the sensors and collected when a train vehicle passes by, thereby acquiring the speed and wheelbase of the train, and further acquiring the train segmentation information; determining the vehicle type; acquiring hook locating information; determining the train arrival; determining the train departure; acquiring vehicle number. The present invention further comprises a system for carrying out the information method for automatically identifying information of a train.Type: GrantFiled: December 26, 2008Date of Patent: August 13, 2013Assignees: Nuctech Company Limited, Tsinghua UniversityInventors: Zhiqiang Chen, Shangmin Sun, Xining Xu, Weizhi Lin, Yanwei Xu, Zhenbin Guo, Bin Hu, Guang Yang