Railroad vehicle squeak evaluation system and squeak reduction system using this

摘要

To provide a system capable of automatically determining the generation of squeak noise and automatically determining on which side the squeak noise is generated between an inside track side and an outside track side of a curved track.SOLUTION: A railroad vehicle squeak noise evaluation system includes: sound detection means 10 for detecting sound that is generated when a railroad vehicle travels on a curved track, and outputting a sound signal corresponding to instantaneous sound pressure of the sound; frequency separation means 20 for extracting a sound signal component in each of a plurality of frequency bands predetermined from the sound signal; conversion means 30 for converting the extracted sound signal component into a sound pressure level represented by a decibel unit in each of the plurality of frequency bands; and determination means 40 for respectively comparing the sound pressure level with a prescribed reference value, and determining that squeak noise is generated, and determining on which side the squeak noise is generated between an inside track Ra side and an outside track Rb side of the curved track in accordance with whether the sound pressure level of what frequency band exceeds the reference value in the case that the sound pressure level of any frequency band exceeds the reference value.SELECTED DRAWING: Figure 1