Rail local defect vehicle-mounting detection method merging with vehicle speed information and front and rear axle box acceleration information

Abstract

The invention discloses a rail local defect vehicle-mounting detection method merging with vehicle speed information and front and rear axle box acceleration information, which belongs to the traffic information security technology. The method comprises the following steps of: collecting the vehicle speed information and the front and rear axle box vertical vibration acceleration information of at least one vibration acceleration sensor at one position by a collector, and then merging the speed information with the front and rear axle box vertical vibration acceleration information, extracting the features of the merged information to obtain a time frequency energy distribution function of the vibration acceleration, then finding a displacement coordinate position corresponding to the time frequency energy distribution function peak value, and finally analyzing the acceleration signal at the position of a rotating cycle of a wheel in a shaft space by the method. With the method, the impact feature of the rail local defects can be detected, the line modification is free, and a detection system is simple. Compared with the prior art, the method has high reliability, low cost, fewer channels, a simple system, high anti-interference performance, a wider application space and a higher application value.

Description

technical field [0001] The invention belongs to the field of transportation, and in particular relates to a vehicle-mounted detection method for track local defects by integrating vehicle speed information and acceleration information of front and rear axle boxes. Background technique [0002] A good track condition is the fundamental condition to ensure the safe and smooth passage of vehicles, and it is also the fundamental purpose of track inspection and maintenance in the railway works section. Among them, the short-wave irregularity of the track is an important factor affecting the state of the track, and it occurs frequently in the railway track. The short-wave irregularity of the track produces wheel-rail impact loads, which can cause severe vibration of the vehicle and the track, and endanger the relationship between the vehicle and the track in severe cases. components, reduce the service life of vehicles and tracks, and even cause vicious events such as vehicle dera...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the time-consuming, labor-intensive and high-cost defects of the existing track short-wave measurement, and provide a time-saving, labor-saving, low-cost, and high-precision vehicle-mounted detection method for track defects

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