Recognition and positioning method of straight circle/circular straight point in flat curve in road linear information

Abstract

The present invention provides a method for identifying and locating straight circles / round straight points on flat curves in road linear information, which is characterized in that it includes the following steps: S1: Obtaining data of a test vehicle running on the road through a vehicle-mounted measuring device and inputting it into a computer, The driving data includes heading angle data, driving instrument data, and the driving trajectory data is calculated; S2: Candidate node identification is carried out through the improved K-means cluster analysis method; S3: The heading angle data map is obtained by drawing, and the candidate nodes Mark on the corner data graph; S4: take the node located in the transition section as a reference point, remove the M sample data before and after the candidate node, so that the data group is cut off and divided into several approximately straight-line parts; S5: the cut off segment Carry out linear fitting; S6: Extend each fitting line segment and make it intersect, and the intersection point is a straight circle or a straight point of a circle. The invention can solve the key problem of road level curve measurement and improve the efficiency and accuracy of road measurement.

Description

technical field [0001] The invention belongs to the field of road measurement, in particular to a method for identifying and locating straight circles / round straight points of flat curves in road linear information. Background technique [0002] At present, the method of manual surveying and mapping is used to collect road geometric parameters at home and abroad, but this method has low detection efficiency and low accuracy, and consumes a lot of manpower and material resources. Collecting data on expressways affects traffic, is not conducive to driving safety, and cannot realize the road network. level data collection and analysis. [0003] The measurement methods for the radius of the road horizontal curve at home and abroad mainly use satellite map data, combined with the chord length method, the chord plane circle method and the circle fitting method to calculate the road horizontal curve radius. However, the data accuracy of satellite maps is too low, and the occlusion...

AI Technical Summary

Problems solved by technology

However, there is currently no good measurement method for automatic identification and positioning of straight circles / round straight points

At present, the detection method of the straight circle / round point widely used is to use the total station for surveying and mapping to determine the straight circle / round point of the flat curve. This method needs to set up instruments on the highway, which has great safety problems, and uses Manual detection of straight circles / round straight points is inefficient

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