Camera shooting measuring method for track geometric parameter

A technology of geometric parameter and camera measurement, which is applied in the field of camera measurement of track geometric parameters, can solve problems such as track swelling and threats to driving safety, and achieve the effect of high degree of digitization and automation, good operability and simple operation

Inactive Publication Date: 2008-12-03
张小虎 +3
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  • Description
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AI Technical Summary

Problems solved by technology

In the seamless track section, if the direction of the track is not good, it may cause swelling of the runway in the high temperature season, which seriously threatens driving safety

Method used

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  • Camera shooting measuring method for track geometric parameter
  • Camera shooting measuring method for track geometric parameter
  • Camera shooting measuring method for track geometric parameter

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Experimental program
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Embodiment Construction

[0032] see figure 2 , the camera measurement method of the track geometric parameters described in the present embodiment is:

[0033] a. Place the measuring car on the track R to be tested, and a camera device C is fixedly installed at one end of the car. The optical axis of the camera C is parallel to the plane of the bottom of the car. On the bottom plane, two marker poles with a distance of r and different heights are set respectively, and a cooperation mark is set on each of the top of the marker poles, which are respectively P 1 ,P 2 ,P 3 ,P 4 , the two sign poles on each side can only move in the direction perpendicular to the plane of the vehicle bottom, and the height difference should be sufficient so as not to make the two cooperation signs block each other during the measurement process;

[0034] b. When the measuring vehicle is running on the track R to be measured, use the camera device C to photograph the cooperation marks P at different moments during the ...

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Abstract

A method for measuring geometric parameters of a track by adopting a camera comprises the following steps: a measuring vehicle is placed on the track to be measured; a camera device is fixedly installed on one end inside the measuring vehicle; an optical axis of the camera device is in parallel with the plane of the bottom of the measuring vehicle; two sign posts are arranged on the track at the other end inside the measuring vehicle and are respectively perpendicular to the two sides of the plane of the bottom of the measuring vehicle; the two sign posts are at different heights and at the distance of r; a cooperation sign is arranged at the top end of each sign post; the sign posts can only move in the direction perpendicular to the plane of the bottom of the vehicle and in the transversal direction; a wheel at the bottom of the sing post moves, and is tightly attached to the inner side of a steel track; when the measuring vehicle moves on the track to be measured, the camera device is utilized to capture images of the cooperation signs at different time; and the images is processed through image processing and data processing on a real-time basis so as to acquire the geometric parameters of the track. The method meets the requirements of modern track construction and development, satisfies the requirements of high precision, high reliability and high automatic degree detection, and has good application prospect in the railroad engineering field.

Description

technical field [0001] The present invention relates to the field of railway construction engineering, as well as digital photogrammetry, digital image processing, computer vision, etc. The image of undulating and moving cooperative markers is a method of obtaining orbital geometric parameters with high precision through automatic image analysis and data processing. Background technique [0002] The measurement of track geometric parameters plays an important guiding role in improving the design of track components, exploring the overall characteristics of the track, determining the rational structure of the track, improving the interaction and influence of the track and rolling stock, and prolonging the service life of track components and rolling stock. [0003] In railway maintenance and repair, the geometric parameters of the track are usually measured by the tamping vehicle detection device, and then the tamping and compaction, lifting and track operation are performed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B35/00E01B35/04G01C11/00G01B11/00
Inventor 张小虎于起峰姜欣伏思华
Owner 张小虎
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