Track geometric irregularity inspection method based on two-dimensional laser displacement sensors

Abstract

The invention discloses a detection method for track geometric irregularity based on a two-dimensional laser displacement sensor. A left laser sensor, a right laser sensor, a longitudinal inclinometer, a lateral inclination meter, a gyroscope, a lateral accelerometer, and a left vertical acceleration are installed on the detection beam. meter, right vertical accelerometer, the left laser sensor and the right laser sensor are two-dimensional laser sensors; perform the following measurements: track gauge detection, height detection, rail direction detection, horizontal superhigh detection, twist detection, curvature detection, Rail vertical as well as side wear measurements. The present invention adopts a high-speed two-dimensional laser displacement sensor, which has strong anti-interference ability. Based on the two-dimensional sensor, there is no complicated image processing step, and with simple and effective back-end algorithm processing, it has higher detection and calculation speed. It can effectively eliminate the influence of vehicle body vibration on the detection result, the detection result has high repeatability, can compensate the detection result, and has higher detection accuracy.

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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