Steel rail near laser visual dynamic measuring device and method

A technology for dynamic measurement and rail wear, applied in the field of measurement, can solve the problems that the measurement sensor cannot have large vibration, affect the accuracy and reliability of the measurement result, and the conversion link is not well solved, and achieves low cost and speed. The effect of fast and reducing equipment cost

Inactive Publication Date: 2006-05-24
BEIHANG UNIV
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Problems solved by technology

The disadvantage of this method is that the upper edge and left edge of the image are used as the positioning reference, so the measurement sensor is required not to have large vibrations, so it is more suitable for static measurement
In fact, the measurement sensor installed on the locomotive must have a large vibration, which affects the accuracy and reliability of the measurement results
In addition, in foreign countries, two sets of measuring sensors are used to measure both sides of the same rail, and the measurement results of the side without wear are used as the reference

Method used

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  • Steel rail near laser visual dynamic measuring device and method
  • Steel rail near laser visual dynamic measuring device and method
  • Steel rail near laser visual dynamic measuring device and method

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Embodiment

[0100] Propose measuring device and measuring method according to the present invention, design actual laser visual sensor, carry out on-the-spot dynamic measurement to rail, the software interface of measuring system is as follows Image 6 shown.

[0101] Figure 7 A measured image including a 50kg rail and the extracted contour feature image are given. Figure 8 is the profile of the rail section in the survey coordinate system and the profile transformed to the design coordinate system; Figure 9 After alignment, measure the profile and design the profile.

[0102] The final measured wear is: vertical wear is 1.9mm, side wear is -0.1mm, total wear is 1.8mm, and the rail type is 50R (50kg right rail). On the PIV3.0 computer, the single measurement time is 25.5ms.

[0103] Figure 10 When the train is stopped, the same fixed rail surface is measured continuously for 540 times, and the rail surface wear repeatability error curve is obtained. The RMS errors are: 0.10mm, 0.0...

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Abstract

The disclosed measuring device is composed of laser vision sensor, computer, image acquisition card in high speed, calibrating target drone and measuring software. The method includes steps: after imaging system for rail section images light plane projected from laser projector, the image acquisition card captures rail section images and sands them to computer. Processing the collected images, the computer picks up image coordinates of sectional feature contour, as well as calculates out vertical abrasion, side abrasion and total abrasion based on measured model. The invention is capable of measuring sectional contour of rail in single side, vertical abrasion, side abrasion and parameter of total abrasion through single laser vision sensor.

Description

technical field [0001] The invention belongs to the technical field of measurement, and relates to a non-contact dynamic measurement device and a measurement method for comprehensive parameters of rail wear. Background technique [0002] The condition of railways is closely related to safety, especially for high-speed trains. Regular inspection of rails is very important to plan properly and keep maintenance costs low. Early measurement of rail wear and deformation can help to develop a better maintenance schedule to avoid emergency treatment when dangerous conditions are observed. On the other hand, early maintenance can make better use of limited manpower and equipment resources. utilization, thereby reducing costs. In addition, proper maintenance reduces noise pollution caused by poor contact between wheels and rails. In recent years, my country's railway speed-up and heavy-duty transportation have been vigorously developed, and passenger and freight volumes and traffi...

Claims

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Application Information

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IPC IPC(8): G01B21/20B61K9/00B61K9/08G01B11/03G01B11/24G01B21/04
Inventor 周富强张广军朱奎义闫伟江洁魏振忠
Owner BEIHANG UNIV
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