Structured light vision-based track irregularity state detection method

A track irregularity and state detection technology, applied in the direction of measuring devices, optical devices, railway vehicle shape measuring devices, etc., to achieve low equipment cost, easy installation, and improve the real-time performance of the system

Inactive Publication Date: 2011-04-27
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

Southwest Jiaotong University in China has carried out relevant research. Lasers and linear array CCDs are respectively installed at the front and rear wheel axles. The lasers directly illuminate the CCD, and the method of directly detecting the offset of the laser spot on the imaging surface is used to detect the state of the track; since only the spot is measured position changes, this method can only obtain one-dimensional spatial information

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  • Structured light vision-based track irregularity state detection method
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  • Structured light vision-based track irregularity state detection method

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Embodiment Construction

[0016] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0017] combine figure 1 and figure 2 , the present invention takes the installation and use of a railway locomotive as a vehicle as an example. The line light sources 200 and 300 are respectively two line lasers in the near-infrared band, and the imaging sensor devices are respectively served by two high-speed imaging devices 220 and 230. The two The laser light emitted by the laser irradiates the rail surface to form laser lines 210 and 310 . Install the near-infrared laser 300 on the axle box 420 of the rear wheel axle of the train bogie, the laser emits a line light source, adjust the angle of the laser, so that the beam line is irradiated on the rail surface near the front wheel 411 wheel-rail contact surface to form a reference light segment 310 , with a small distance (such as 3 cm) from the light bar 210 . The size of the interval should m...

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Abstract

The invention discloses a structured light vision-based track irregularity state detection method. In the structured light-based method, moving together with a carrier, an imaging sensor device acquires two-dimensional planar spatial geometrical deviations of detected tracks 100 under the dynamic load condition by sensing the change of a geometrical position between a reference light section 310 and a standard light section 210; and two sets of detection systems on the carrier are widely used for detecting the geometrical deviations of the left track and the right track respectively so as to acquire related planar geometrical deviation information of the left track and the right track. The method has more information quantity compared with light spot detection, can acquire height irregularity information of the track surfaces in the vertical direction, can acquire track direction irregularity information along the transverse directions of the tracks, has high detection precision and good instantaneity, and is convenient for installation and engineering.

Description

technical field [0001] The invention relates to the field of structured light visual measurement technology and rail traffic safety detection technology, in particular to a high-speed visual detection method for railway track irregularities based on structured light. [0002] Background technique [0003] Track irregularity exists on the contact surface of wheel and rail, which will increase the dynamic effect of wheel and rail, and at the same time further increase the track irregularity, forming a vicious circle. Excessive track irregularities will lead to severe vibration of the wheel-rail system, shorten the service life of vehicles and track components, reduce the stability of driving, and endanger driving safety in severe cases. Routine testing cannot affect the normal transportation of high-speed railways, and efficient means must be used. For the detection of track irregularities, most domestic and foreign detection systems based on the principle of inertial refere...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61K9/08G01B11/30
Inventor 张志勇潘炜闫连山罗斌邹喜华
Owner SOUTHWEST JIAOTONG UNIV
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