초록 ▼

Method and apparatus for the detection of defective track wheels on rail vehicles such as carriages and/or locomotives, whereby an electromagnetic beam such as a laser beam (9) is directed towards the wheel (5) in a direction substantially at right-angles to the plane of the wheel while the carriage

Method and apparatus for the detection of defective track wheels on rail vehicles such as carriages and/or locomotives, whereby an electromagnetic beam such as a laser beam (9) is directed towards the wheel (5) in a direction substantially at right-angles to the plane of the wheel while the carriage and/or the locomotive is running. A series of signals are recorded corresponding to electromagnetic beams reflected from the wheel (5) substantially at right-angles to the plane of the wheel, and a measurement is carried out of the Doppler frequency change between the transmitted beam (9) and the reflected beam. On the basis hereof, a signal processing is effected for the determination of the vibration pattern of the relevant wheel, and a determination of the condition of the relevant wheel is carried out on the basis of the vibration pattern.

대표청구항 ▼

1. A method for detecting defective track wheels on rail vehicles comprising:transmitting an electromagnetic beam towards a wheel in a direction which is substantially at right angle to a plane of the wheel; registering a series of signals corresponding to at least on electromagnetic beam reflected

1. A method for detecting defective track wheels on rail vehicles comprising:transmitting an electromagnetic beam towards a wheel in a direction which is substantially at right angle to a plane of the wheel; registering a series of signals corresponding to at least on electromagnetic beam reflected from the wheel at a substantially right angle to the plane; carrying out a series of measurements of a Doppler frequency change between the transmitted beam and the reflected beam; determining a vibration pattern of the wheel based on a signal process; and determining a condition of the wheel based on the vibration pattern.