METHOD FOR MONITORING THE STATE OF A BOGIE OF A RAILWAY VEHICLE COMPRISING AT LEAST ONE WHEEL SET
First Claim
1. A method for monitoring the state of a bogie of a rail vehicle, comprising at least one wheel set (4), wherein the wheels of the at least one wheel set are rigidly connected by an axle and have an approximately conical wheel profile, the method comprising:
- filtering out signals which correspond to a sinusoidal motion of the at least one wheel set of the bogie based on the conical wheel profile of the wheels so that the sinusoisal motion signals are filtered out of the signals supplied by at least one sensor arranged on the bogie;
determining a frequency (f) of the sinusoidal motion with respect to peripheral conditions including a respectively present vehicle speed;
comparing the determined frequency with a stored value or value range indicative of present peripheral conditions, for the frequency (f) of the sinusoidal motion; and
monitoring a deviation of the measured frequency (f) from the stored value or value range.
1 Assignment
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Accused Products
Abstract
A method for monitoring the state of a bogie of a railway vehicle having at least one wheel set, wherein the wheels of the wheel set are rigidly connected by an axle and have an approximately conical wheel profile, and signals corresponding to a sinusoidal run of the wheel set of the bogie based on the conical wheel profile of the wheels are filtered out of signals provided by sensors disposed on the bogie. The frequency of the sinusoidal run is determined relative to boundary conditions, such as the prevailing vehicle speed, and compared to a save value or range of values for the frequency of the sinusoidal run typical for the prevailing boundary conditions, wherein the deviation of the measured frequency from the saved value or range of values for the frequency is monitored.
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Citations
20 Claims
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1. A method for monitoring the state of a bogie of a rail vehicle, comprising at least one wheel set (4), wherein the wheels of the at least one wheel set are rigidly connected by an axle and have an approximately conical wheel profile, the method comprising:
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filtering out signals which correspond to a sinusoidal motion of the at least one wheel set of the bogie based on the conical wheel profile of the wheels so that the sinusoisal motion signals are filtered out of the signals supplied by at least one sensor arranged on the bogie; determining a frequency (f) of the sinusoidal motion with respect to peripheral conditions including a respectively present vehicle speed; comparing the determined frequency with a stored value or value range indicative of present peripheral conditions, for the frequency (f) of the sinusoidal motion; and monitoring a deviation of the measured frequency (f) from the stored value or value range. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11, 12)
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4. A method for monitoring the state of a bogie of a rail vehicle, comprising at least one wheel set and at least one anti-rolling damper, wherein wheels of the at least one wheel set are rigidly connected by an axle and have an approximately conical wheel profile, the method comprising:
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determining a damping characteristic value signals supplied by at least one sensor arranged on the bogie; comparing the determined damping characteristic value with a stored typical value or value range for the damping characteristic value; checking how high a speed of the rail vehicle is in elation to a predefined speed limit when there is a deviation of the determined damping characteristic value from the stored value or value range for the damping characteristic value which exceeds a predetermined amount; generating a signal (S) indicating the occurrence of a change in the vicinity of the anti-rolling damper of the bogie when a speed of the rail vehicle undershoots a predefined speed limit; filtering signals which correspond to a sinusoidal motion of the at least one wheel set of the bogie out of signals supplied by the at least one sensor arranged on the bogie based on the approximately conical wheel profile when the speeds of the rail vehicle reach or exceed the predefined speed limit; determining a damping characteristic value of the wheel set of the bogie as a function of the determined frequency (f) of the sinusoidal motion and a present speed (v) based on at least one stored characteristic diagram which describes dependence of the damping characteristic value of the wheel set on the speed (v) of the rail vehicle and the frequency (f) of the sinusoidal motion; comparing the determined damping characteristic value of the At least one wheel set of the bogie with a stored value or value range indicative of the present speed (v) of the rail vehicle and the current frequency (f) of the sinusoidal motion for the damping characteristic value of the at least one wheel set of the bogie; and when there is a deviation of the determined damping characteristic value of the at least one wheel set of the bogie from the stored value or value range for the damping characteristic value of the wheel set of the bogie which exceeds a predetermined amount, generating a signal (S) for the occurrence of a change in the vicinity of the wheel set of the bogie;
orwhen there is a deviation of the determined damping characteristic value of the at least one wheel set of the bogie from the stored value or value range for the damping characteristic value of the wheel set of the bogie which reaches or undershoots the predetermined amount, generating a signal (S) for the occurrence of a change in the vicinity of the anti-rolling damper of the bogie. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification