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Rapid non-contact measuring method of railway intrusion boundary

A non-contact, measuring method technology, applied in the direction of railway vehicle shape measuring instrument, measuring device, railway car body parts, etc., can solve the problems of cumbersome device, complicated use, low measurement efficiency, etc., to improve the measurement efficiency and measurement accuracy. Effect

Inactive Publication Date: 2011-01-19
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the structure of the platform measuring ruler itself, the device is relatively heavy, the use is more complicated, and the accuracy is not high enough
The measurement needs to be operated by human beings and the measurement data is read out, the measurement efficiency is low and the labor intensity is high

Method used

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  • Rapid non-contact measuring method of railway intrusion boundary
  • Rapid non-contact measuring method of railway intrusion boundary
  • Rapid non-contact measuring method of railway intrusion boundary

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Embodiment Construction

[0025] The fast non-contact railway boundary measurement method of the present invention adopts a line structure laser to emit a laser line perpendicular to the rail surface, and the camera collects the image of the place where the laser line is irradiated, according to the two-dimensional coordinates in the computer image coordinate system and the world coordinate system. The conversion relationship between the three-dimensional space coordinates of the laser line, the distance between the object at the laser line irradiation and the gauge center and the height relative to the rail surface are obtained:

[0026] The microprocessor 3 controls the line structure laser 1 to emit a laser line perpendicular to the rail surface, the camera 2 sends the collected images to the microprocessor 3 for processing, and the microprocessor 3 according to the two-dimensional coordinates in the computer image coordinate system and the world The conversion relationship between the three-dimensio...

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Abstract

The invention provides a rapid non-contact measuring method of railway intrusion boundary, and specifically relates to the method of automatically measuring the distance between objects such as a railway station and the like and a gauge center and the height of the objects relative to a rail surface based on a structured light three-dimensional visual detection technology. In the method, on the basis of a principle of structured light three-dimensional visual measurement, a linear-structured laser and a camera are employed, wherein, the linear-structured laser emits a laser line which is vertical to the rail surface, the camera acquires an image illuminated by the laser line, and a microprocessor calculates the distance between the objects such as the railway station and the like and the gauge center and the height of the objects relative to the rail surface according to spatial three-dimensional relation, thus realizing non-contact, high-speed and high-precision measurement.

Description

technical field [0001] The invention relates to a fast non-contact railway boundary measurement method based on structured light three-dimensional vision detection technology, and belongs to the technical field of automatic detection. Background technique [0002] In recent years, the speed of domestic railways has been increased many times, especially the operation of high-speed EMUs, and the speed of trains is getting faster and faster, which also puts forward higher requirements for railway safety. When the platform, wires or other objects invade the space where the train runs, it will cause serious safety accidents. Therefore, the measurement of railway encroachment is extremely important. [0003] For the measurement of platform encroachment, the railway department currently has a mechanical platform measuring ruler, which is used to measure the distance between the gauge center and the side of the platform and the height between the rail surface and the platform plane...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61K9/08G01B11/14G01B11/02
Inventor 王顺张益昕张旭苹俞乾李建华
Owner NANJING UNIV
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