Track geometric irregularity detection method based on two-dimensional laser displacement sensor

Abstract

The invention discloses a track geometric irregularity inspection method based on a two-dimensional laser displacement sensors. The track geometric irregularity inspection method comprises the steps of mounting a left laser sensor and a right laser sensor which are two-dimensional laser sensors, a longitudinal inclinometer, a transverse inclinometer, gyroscopes, a transverse accelerometer, a leftvertical accelerometer and a right vertical accelerometer at an inspection beam, and carrying out a gauge inspection, a height inspection, a track alignment inspection, a level superelevation inspection, a warping inspection, a curvature inspection and a track verticality and lateral wear measurement. The invention adopts the high-speed two-dimensional laser displacement sensors which have high anti-jamming capability. Based on the two-dimensional laser sensors, without a complex image processing step and by virtue of simple and effective back-end algorithm processing, the track geometric irregularity inspection method has higher inspection and calculation speed and can effectively eliminate the influence of vehicle body vibration on inspection results. The inspection results have high repeatability and can be compensated, so that the inspection precision is higher.

Description

technical field [0001] The invention belongs to the field of rail transit equipment and vehicles, and relates to a method for detecting geometric irregularity of a track based on a two-dimensional laser displacement sensor. Background technique [0002] The track irregularity detection algorithm based on laser camera technology is applied to the track inspection vehicle to dynamically detect the geometric irregularity parameters of the track. Laser camera measurement technology has become the mainstream of the current international track detection technology development. Its current situation at home and abroad is as follows: [0003] 1. The status quo abroad [0004] Japan East-i comprehensive inspection train. East-i is a comprehensive inspection train developed by Japan fully using its domestic technology. It consists of 6 inspection vehicles, which can detect track geometric parameters, catenary, communication signals, wheel-rail force, environmental noise, etc., and t...

AI Technical Summary

Problems solved by technology

[0013] 1. The sensor is susceptible to sunlight interference

[0014] 2. The detection and calculation speed needs to be improved

[0015] 3. The detection result is easily affected by the detection speed

[0016] 4. The test results are easily affected by the vibration of the car body

[0017] 5. The detection function needs to be enriched

[0018] 6. Laser camera image processing is complex, which seriously affects the detection speed

[0019] 7. Low repeatability of test results

[0020] 8. It is difficult to establish an inertial reference based on an inertial platform

[0021] 9. The operation of sensor calibration is complicated

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