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公开(公告)号：US11760397B2
公开(公告)日：2023-09-19
申请号：US17438001
申请日：2021-02-05
发明人： Hanxin Chen , Xuexiang Xiong , Changzheng Yuan , Degui Teng , Zejun Xiang , Jing Ming , Chun Yu , Chao Li , Heng Zhang , Bo Hu , Datao Wang , Hao Tang , Jiangwei Lin
摘要： A method for extracting and analyzing spatial information of a control and protection zone of rail transit with multiple threshold constraints, including the following steps: 1, performing format conversion on a data file and extracting a plurality of coordinate points; 2, selecting key points from the plurality of coordinate points for data simplification to obtain a simplified limit line, a simplified outer structure edge line and a simplified boundary line of construction; 3, programming the simplified limit line, the simplified outer structure edge line, and the simplified boundary line of construction, calling a database, and reading data therefrom for spatial relationship comparison; 4, determining whether the construction of a rail-involved construction project intrudes into a control and protection zone of rail transit according to a result of the spatial relationship comparison, thus completing the extraction and analysis of the spatial information of the control and protection zone of rail transit.
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公开(公告)号：US20220169295A1
公开(公告)日：2022-06-02
申请号：US17438001
申请日：2021-02-05
发明人： Hanxin Chen , Xuexiang Xiong , Changzheng Yuan , Degui Teng , Zejun Xiang , Jing Ming , Chun Yu , Chao Li , Heng Zhang , Bo Hu , Datao Wang , Hao Tang , Jiangwei Lin
摘要： A method for extracting and analyzing spatial information of a control and protection zone of rail transit with multiple threshold constraints, including the following steps: 1, performing format conversion on a data file and extracting a plurality of coordinate points; 2, selecting key points from the plurality of coordinate points for data simplification to obtain a simplified limit line, a simplified outer structure edge line and a simplified boundary line of construction; 3, programming the simplified limit line, the simplified outer structure edge line, and the simplified boundary line of construction, calling a database, and reading data therefrom for spatial relationship comparison; 4, determining whether the construction of a rail-involved construction project intrudes into a control and protection zone of rail transit according to a result of the spatial relationship comparison, thus completing the extraction and analysis of the spatial information of the control and protection zone of rail transit.
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公开(公告)号：US20210223408A1
公开(公告)日：2021-07-22
申请号：US16300963
申请日：2017-12-25
发明人： HANXIN CHEN , ZEJUN XIANG , CHUAN LONG , JING MING , YONGGANG GOU , NAN LV , HAN CHEN , ZAIQIAN LUO , FENG LI , ZHI HUANG , XIAOLIN HU
摘要： The present invention provides a point cloud data acquisition method and device under a situation of no GNSS signal. The method comprises: re-sampling line data acquired from a topographic map to obtain discrete line data; generating a full-second PPS pulse in a simulating manner; counting by using a distance measuring instrument, sampling the count, when it is detected that the full-second PPS pulse is received, calculating position information at a current moment; simulating a GNSS satellite protocol according to the position information at the current moment; parsing the GNSS satellite protocol by using a point cloud data acquisition module to complete time synchronization, and controlling a LiDAR to acquire point cloud data; parsing the GNSS satellite protocol by using an inertial measurement module, and recording attitude determination positioning data in real time to generate POS data; and optimizing the POS data to obtain accurate point cloud data.
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公开(公告)号：US11887254B2
公开(公告)日：2024-01-30
申请号：US17437685
申请日：2021-02-04
发明人： Zejun Xiang , Zhiyong Zhou , Yan Zhang , Liangchao Chen , Kaiquan Hu , Hong Ma , Junqian Zhang
CPC分类号： G06T17/05 , G06F17/16 , G06T19/20 , G06T2210/32 , G06T2219/2016
摘要： A method for correcting space coordinates of a three-dimensional model includes: step S1, reading information of an original coordinate frame of a three-dimensional model in a first format and the origin of coordinates of the model; reading information of nodes from three-dimensional model data in the first format, and calculating original coordinates of the nodes; step S2, calculating parameters of correction between the original coordinate frame and a target coordinate frame; step S3, transforming and correcting the coordinates of the origin and nodes of the three-dimensional model in the first format one by one by using the space coordinate correction matrix to obtain information of coordinate points of the three-dimensional model in the second format; and step S4, storing a file of the three-dimensional model in the second format with corrected space coordinates. Also, a method for encrypting space coordinates of a three-dimensional model is provided.
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公开(公告)号：US20220414982A1
公开(公告)日：2022-12-29
申请号：US17437685
申请日：2021-02-04
发明人： Zejun Xiang , Zhiyong Zhou , Yan Zhang , Liangchao Chen , Kaiquan Hu , Hong MA , Junqian Zhang
摘要： The present disclosure provides a method for correcting and encrypting space coordinates of a three-dimensional model. The method for correcting space coordinates of a three-dimensional model includes: step S1, reading information of an original coordinate frame of a three-dimensional model in a first format and the origin of coordinates of the model; reading information of nodes from three-dimensional model data in the first format, and calculating original coordinates of the nodes; step S2, calculating parameters of correction between the original coordinate frame and a target coordinate frame based on space coordinates of four or more control points in the original coordinate frame in the first format and corresponding space coordinates of the control points in the target coordinate frame in a second format, and constructing a space coordinate correction matrix; step S3, transforming and correcting the coordinates of the origin and nodes of the three-dimensional model in the first format one by one by using the space coordinate correction matrix to obtain information of coordinate points of the three-dimensional model in the second format; and step S4, storing a file of the three-dimensional model in the second format with corrected space coordinates. Thus, the production efficiency is improved.
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公开(公告)号：US11385359B2
公开(公告)日：2022-07-12
申请号：US16300963
申请日：2017-12-25
发明人： Hanxin Chen , Zejun Xiang , Chuan Long , Jing Ming , Yonggang Gou , Nan Lv , Han Chen , Zaiqian Luo , Feng Li , Zhi Huang , Xiaolin Hu
摘要： The present invention provides a point cloud data acquisition method and device under a situation of no GNSS signal. The method comprises: re-sampling line data acquired from a topographic map to obtain discrete line data; generating a full-second PPS pulse in a simulating manner; counting by using a distance measuring instrument, sampling the count, when it is detected that the full-second PPS pulse is received, calculating position information at a current moment; simulating a GNSS satellite protocol according to the position information at the current moment; parsing the GNSS satellite protocol by using a point cloud data acquisition module to complete time synchronization, and controlling a LiDAR to acquire point cloud data; parsing the GNSS satellite protocol by using an inertial measurement module, and recording attitude determination positioning data in real time to generate POS data; and optimizing the POS data to obtain accurate point cloud data.
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