Railway stock e.g. high-speed gas turbine motor coach, wheel roundness fault e.g. wheel flat, detecting method, involves filtering signals by band-pass filter to retain signals linked to frequency vibrations in maximum attenuation band

摘要

#CMT# #/CMT# The method involves acquiring, by sensors (4), analog signals representing an amplitude of vibrations induced by wheels, and acquiring, by sensors (5), another series of analog signals to generate a synchronization signal at the passage of the wheels. A synchronized digitization of the signals is performed to find the position of each wheel relative to the sensors (4). The digitized signal is filtered by a band-pass filter to retain signals linked to frequency vibrations in a maximum attenuation band. The filtered signal is compared with a preset value to determine wheel roundness defects. #CMT# : #/CMT# Independent claims are also included for the following: (1) a device for detecting roundness defects of a wheel (2) a computerized system for detecting roundness defects of wheels of a railway stock circulating on a track. #CMT#USE : #/CMT# Used for detecting faults e.g. shelling, wheel flat and material contributions, in the roundness of wheels of railway stock (claimed) e.g. high-speed gas turbine motor coach, passenger transport car and freight wagon, of railway and tramway, when the stock passes over a track and after shock or emergency braking. #CMT#ADVANTAGE : #/CMT# The method allows detecting the faults in the roundness of the wheels of the railway stock in real time manner during passage of the railway stock on the leg of the track. The comparison of the filtered signal with preset values allows easily distinguishing the defect wheel from the healthy wheels. The method also prevents interference of defect presented by a wheel with the detection of defect on another wheel, lowers preventing maintenance cost, curative maintenance cost and downtime cost of the railway stock, and optimizes the spare parks of wheels. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic of a computerized system comprising a railway stock wheel roundness fault detecting device. `(Drawing contains non-English language text)` 1 : Wheel roundness defect detecting device 2 : Running track 3 : Cross members 4 : Vibration measurement sensors 5, 51, 52 : Inductive sensors.