Method for automatically measuring road curvature radius

A technology for automatic measurement and road curvature, applied to measuring devices, instruments, optical devices, etc., can solve the problems of inconvenient measurement methods and large errors, and achieve intuitive calculation results, convenient detection, and high measurement accuracy.

Inactive Publication Date: 2014-12-24
CHANGAN UNIV
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

The traditional method of measuring the radius of curvature of the road is to use a tape measure or visual inspection. These measurement methods are inconvenient and have large errors

Method used

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  • Method for automatically measuring road curvature radius
  • Method for automatically measuring road curvature radius

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Embodiment Construction

[0018] refer to figure 1 , according to the technical solution of the present invention, in the automatic measurement of the road curvature radius, the present embodiment adopts a CCD camera for image acquisition, and the CCD camera is fixed on the top of the front of the vehicle by means of a bracket. The installation height of the CCD camera is 1.66 meters, and the focal length is 24.576 millimeters. The tilt angle α is 15.4°, and the lens faces forward and downward.

[0019] The CCD camera adopts a 1 / 4" SONY machine vision special camera with 6 million effective pixels. The CCD camera is connected to the computer in the vehicle through a USB2.0 data line to receive the curve image, and the computer performs image preprocessing, lane edge extraction, The radius of curvature of the road can be obtained through the selection of feature points and geometric calculation.

[0020] Specific steps are as follows:

[0021] (1) Installation of CCD camera

[0022] The CCD camera is...

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Abstract

The invention discloses a method for automatically measuring road curvature radius, which comprises the following steps: installing a CCD (charge coupled device) camera used for collecting a image of a corner at the top of the front end of a vehicle; connecting a computer arranged in the vehicle with the CCD camera through a USB (universal serial bus) 2.0 data line; receiving the image of the corner; extracting edges of a road through software in the computer; and figuring out the curvature radius of the corner through geometric algorithm and geometric transformation with the help of coordinates of three special points on edge lines of the road. According to the method for automatically measuring road curvature radius, the investment cost is little, the operation is simple, the detection is convenient, the computing results are visual and accurate, the measurement accuracy is high, and the measure can be carried out without tools such as a tape and the like.

Description

technical field [0001] The invention relates to the technology for measuring the radius of curvature of a road, in particular to an automatic measurement method for the radius of curvature of a road. Background technique [0002] With the increase of the highway mileage and vehicle ownership in our country, the number of traffic accidents in our country is growing rapidly. In these traffic accident cases, a large part of them happened when the vehicle turned on the curve. Therefore, the traffic police department When surveying the accident scene, it is necessary to measure the radius of curvature of the road (that is, the radius of the curve) in order to provide data support for analyzing the accident process. The traditional method of measuring the radius of curvature of the road is to use a tape measure or visual inspection. These measurement methods are inconvenient and have large errors. With the development of computer technology and image processing technology, it bec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/255
Inventor 魏朗杨炜刘永涛陈涛
Owner CHANGAN UNIV
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