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A road alignment feature recognition and parameter calculation method based on vehicle pos

A technology of parameter calculation and feature recognition, applied in the field of integrated navigation and positioning system and measurement, can solve problems such as automatic identification and calculation of unfavorable highway alignment, identification and calculation of unfavorable alignment, human factor interference, etc. Improve efficiency and accuracy, reduce the effect of human factors

Active Publication Date: 2019-09-10
LIAONING TECHNICAL UNIVERSITY
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AI Technical Summary

Problems solved by technology

[0007] In summary, the use of CAD spline method has many human factors interference, which is not conducive to the research of automatic identification and calculation theory of highway alignment
Based on the curvature method, azimuth method and comprehensive method, the joint adjustment method, azimuth method and least squares method all use vehicle-mounted GPS data to study the calculation method of road alignment parameters. In complex environments such as satellite signals are affected by occlusion or multi-path, and the car body cannot guarantee to drive strictly in accordance with the center line and the car body shakes, the calculated curvature or azimuth will fluctuate based on a certain trend, even if a specific sampling step is selected Calculation will also lose the accuracy of judgment, which is not conducive to the recognition and calculation of line shape

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  • A road alignment feature recognition and parameter calculation method based on vehicle pos
  • A road alignment feature recognition and parameter calculation method based on vehicle pos
  • A road alignment feature recognition and parameter calculation method based on vehicle pos

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Embodiment Construction

[0052] An embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0053] In this embodiment, taking the linear feature recognition and parameter calculation of a section of Jingcheng Highway (20km in the whole) as an example, for the steps in the present invention, the results of the preliminary recognition of the linear shape, the window automatic recognition result of a section of the straight line, and the entire road section are respectively analyzed. The linear feature distribution and the fitting deviation of the whole road section are used to illustrate the feasibility and effectiveness of this method.

[0054] POS (Position Orientation System) is a positioning and attitude determination system based on the integrated navigation principle of GNSS (Global Navigation Satellite System) / INS (Inertial Navigation System). Its combination methods are mainly divided into three types: loose combination, tight combinat...

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Abstract

A road alignment feature recognition and parameter calculation method based on vehicle-mounted POS, which belongs to the field of integrated navigation and positioning systems and measurement technology; the method includes: collecting vehicle position parameters, speed parameters and attitude parameters; extracting heading angle information and sampling point mileage; calculating The rough curvature distribution of the whole road section divides the initial road alignment into straight line and circular curve; adjusts the window size of straight line and circular curve, and calculates the parameters of the transition curve line shape; makes statistics based on the straight line line shape parameters, circular curve line shape parameters and transition curve line shape parameters The curvature of the whole road section changes with the mileage, and the optimal line shape characteristics and parameters of the whole road section are obtained; the data acquisition method of the present invention can provide the attitude information of the carrier, which improves the efficiency and accuracy; the MFM is used to smooth the heading angle information, reduce the influence of white noise, and effectively eliminate Granular noise overcomes the problem of huge amount of calculation; the automatic window recognition method reduces the influence of human factors to a greater extent and reduces the workload.

Description

technical field [0001] The invention belongs to the field of combined navigation and positioning system and measurement technology, and in particular relates to a road alignment feature recognition and parameter calculation method based on a vehicle-mounted POS. Background technique [0002] The collection and calculation of highway alignment data is an important task in the process of highway popularization survey. At present, there are mainly two research methods for road alignment calculation at home and abroad: (1) research on the selection and combination of basic elements of road design and alignment fitting based on mathematical models; (2) research on the selection of basic elements of road design combined with CAD technology Combination and linear fitting. Relevant foreign scholars tend to identify road alignment first and then study, including arc length-curvature method, slope method and comprehensive method. Relevant domestic scholars tend to conduct in-depth r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/16G01C21/28G01S19/49
Inventor 郝雨时徐爱功隋心王长强杨东辉刘韬郭哲
Owner LIAONING TECHNICAL UNIVERSITY
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