Vibration scratch detection method

Abstract

A vibration scratch detection method for detecting wheel scratches, comprising the following steps: (1): detection of impact signals, (2): filtering processing, (3): normalization processing, (4): kurtosis statistics , (5): scratch processing, (6): maximum value processing, (7): simultaneous processing on the same track, (8): threshold value processing and scratch judgment, and those that meet a certain threshold are regarded as scratches; the vibration of the present invention The scratch detection method adopts the sensor to sense the bumpy amplitude of the track and forms an impact signal, and then performs signal processing on the impact signal as in the aforementioned steps to determine the wheel scratch position, which is convenient for correct maintenance of the wheel and ensures that the driving Safety. The entire detection process does not require manual participation, saves labor, has strong practicability, and can monitor the train in real time to provide valuable data for maintenance, and can understand faults in time, prevent the occurrence of faults, ensure driving safety, and protect the lives of passengers. property protection.

Description

technical field [0001] The invention relates to a detection method, in particular to a detection method for wheel vibration scratches. Background technique [0002] During the operation of the train, the tread of the wheel is often partially scratched due to braking or idling and slipping. When the scratched wheel runs between the wheel and the rail, an additional wheel-rail impact force will be generated, and its size varies with the length and depth of the scratch and the speed of the train. Several times to dozens of times the static load of the wheel, and with the rolling of the wheel, it periodically acts on the track and the vehicle system, causing coupling vibration of the entire vehicle track system, and even fracture of the wheel axle, rail and sleeper, etc., seriously affecting the train. The safety and service life of track facilities. [0003] The existing wheel tread scratch detection technology is mainly ground detection, and the force-measuring rail is used m...

AI Technical Summary

Problems solved by technology

[0002] During the operation of the train, the wheel tread is often partially scratched due to braking or idling slippage. When the scratched wheel runs between the wheel and rail, an additional wheel-rail impact force will be generated, and its size varies with the length and depth of the scratch and the speed of the train. Several times to dozens of times the static load of the wheel, and with the rolling of the wheel, it periodically acts on the track and the vehicle system, causing coupling vibration of the entire vehicle track system, and even fracture of the wheel axle, rail and sleeper, etc., seriously affecting the train. Safety and service life of track facilities

[0003] The existing wheel tread scratch detection technology is mainly ground detection, and the force-measuring rail is used most in the ground detection method. However, the number of strain gauges arranged on the track is limited, and the wheel scratch position just acts on the strain gauge installation. Low probability, easy to miss

Due to the larger response range of the vibration sensor, some detection systems install acceleration sensors on the track to replace the strain gauges. However, this method is difficult to avoid the influence of adjacent wheels and is prone to misjudgment.

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