METHOD AND DEVICE FOR DETECTING WHEELS WITH DEFORMED TREADS IN RAILROAD VEHICLES

摘要

A device for detecting deformed wheels in a railroad vehicle (1) moving along a track (2). At least two wave motion sensors (3, 4) are positioned along said track. The wave motions in the rails created by the axial pressure of the vehicle are filtered out from two wave motion sensors spaced apart a distance L1 along the rails, and the vehicle speed is determined as well as the timing for each vehicle axle passage over at least one of the sensors. The frequency fractions of the vibration signal resulting from possible wheel deformations are filtered out from one or two of the sensors. An analyzer unit (9) analyzes the type of wheel deformation while determining which one of the vehicle wheels that is defective. A signal is fed to an alarm circuit (11) upon indication from the analyzer unit that the signal or signals from the high frequency filtering deviate(s) from predetermined, acceptable formations.