Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B61—RAILWAYS
  • B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
  • B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
  • B61K9/08—Measuring installations for surveying permanent way
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B61—RAILWAYS
  • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
  • B61F9/00—Rail vehicles characterised by means for preventing derailing, e.g. by use of guide wheels
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B61—RAILWAYS
  • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
  • B61L15/00—Indicators provided on the vehicle or train for signalling purposes
  • B61L15/0081—On-board diagnosis or maintenance
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B61—RAILWAYS
  • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
  • B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
  • B61L23/04—Control, warning or like safety means along the route or between vehicles or trains for monitoring the mechanical state of the route
  • B61L23/042—Track changes detection
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B61—RAILWAYS
  • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
  • B61L25/00—Recording or indicating positions or identities of vehicles or trains or setting of track apparatus
  • B61L25/02—Indicating or recording positions or identities of vehicles or trains
  • B61L25/025—Absolute localisation, e.g. providing geodetic coordinates
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B61—RAILWAYS
  • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
  • B61L2205/00—Communication or navigation systems for railway traffic
  • B61L2205/04—Satellite based navigation systems, e.g. global positioning system [GPS]

Definitions

• the invention relates to a method for monitoring the running stability in rail vehicles, in which transverse acceleration values for bogies of the rail vehicle are measured and an exceeding of a threshold value for the lateral acceleration of one of the bogies is interpreted and signaled as a critical state.
• running stability monitoring which is based essentially on measurements for lateral acceleration of the bogies.
• the usual predetermined running stability parameters are influenced by various parameters of the track and the rail vehicle. These parameters are largely variable. These are, for example, the track position, the profile wear, the conicity and the condition of the rolling dampers.
• a predetermined threshold for the lateral acceleration of a bogie is exceeded, this is signaled, for example by issuing an alarm signal. Also, upon detection of a transverse acceleration exceeding the operation of the vehicle is acted, for example by limiting its maximum speed and possibly making a visual inspection of the bogies. It often happens that a single trackside disturbance is responsible for causing the triggered alarm, i. E. a fault that is not due to operating restrictions of the bogies.
• each bogie of the rail vehicle is viewed and evaluated individually.
• predetermined stability criteria are exceeded, an alarm is triggered, the speed of the rail vehicle reduced and checked the bogie immediately or at the next opportunity for damage.
• lateral acceleration value 8 m / s 2
• further threshold values are defined for a maintenance message (for example, 5 m / s 2 ).
• the bogie After exceeding the predetermined thresholds, the bogie is checked in a workshop.
• the troubleshooting in such a workshop is complex and often unsuccessful. For example, defective vibration dampers are often recognizable as such only in a dismantled state.
• the correct function of the measuring device for the lateral acceleration of the bogies may be checked by dismantling and vibrating the sensors at specified intervals during maintenance.
• the invention has for its object to provide a method for monitoring the running stability of a rail vehicle, in which a greater significance in terms of the state of a bogie can be obtained.
• This object is achieved in that for the differentiation between a trackside caused disturbance and a bogie failure, a comparison of the transverse acceleration of at least a portion of the bogies of the rail vehicle or the train is made and the signaling of a fault takes place only if found a bogie due to the comparison becomes.
• the time or distance-related courses of lateral acceleration values of the bogies are included in the comparison.
• temporal changes in the acceleration behavior of the bogies and their temporal correlations can be determined. From this, too, the cause for achieving particularly high lateral acceleration values can be determined more precisely.
• the method explained above can also serve to improve a state description for each individual bogie in terms of its accuracy.
• a determined trackside caused disturbance level can be calculated out of state values for the bogies.
• historical data may also be included to evaluate bogie conditions.
• trend statements can be made.
• a monitoring fails can respond differently, depending on the state of the bogie concerned.
• an operational constraint such as limiting the maximum speed can be avoided.
• a condition-based maintenance can be carried out, i. Targeted and planned work can be done if needed.
• the historical data includes historical acceleration values related to particular links. This makes it possible to analyze current and historical acceleration values in relation to the relevant section of the route and to report changes and faults if necessary.
• a message may also contain location information. Such a location can be obtained for example with the aid of a GPS receiver on the rail vehicle.
• a comparison of mean acceleration values of lateral acceleration sensors on the bogies can preferably be made to evaluate a sensor calibration and failure monitoring.
• lateral acceleration values are measured for each individual bogie. These lateral acceleration values are fed to a central evaluation unit, which makes comparisons between the measured lateral acceleration values for the various bogies.
• a threshold for the lateral acceleration is given, the exceeding of which basically leads to a fault is signaled to the bogie.
• a suitable threshold value is, for example, the acceleration value 8 m / s 2 , which is derived from the standard works mentioned above.
• a comparison of the measured lateral acceleration values for the bogies of the rail vehicle takes place. All bogies can be included or just a representative part thereof. If it is now determined that the lateral acceleration threshold value is exceeded in at least one bogie and the acceleration level substantially increases substantially at several bogies, it can be assumed that there is a trackside disturbance, so that maintenance or checking of those bogies exceeding the threshold value did not appear necessary.
• the lateral acceleration level would be raised only on the affected bogie and would normally remain at a higher level compared to the other bogies. Only in such cases, a corresponding operational response (visual inspection and reduction of the maximum speed) is necessary.
• the invention also makes it possible to more accurately determine the state of the bogie.
• the influence of the track can be largely excluded, since, for example, the lateral acceleration of all bogies move on a poor track at a higher level.
• Historical data may in particular be historical acceleration values, these acceleration values being assigned to specific sections of the route. This is made possible by the fact that the rail vehicle has a location detection, for example in the form of a GPS receiver. It will be possible to analyze current and historical acceleration values related to the section of track concerned, after which changes and disturbances will be reported, also with reference to the particular section, including the associated location.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Health & Medical Sciences (AREA)
• Biomedical Technology (AREA)
• General Health & Medical Sciences (AREA)
• Train Traffic Observation, Control, And Security (AREA)
• Electric Propulsion And Braking For Vehicles (AREA)
• Machines For Laying And Maintaining Railways (AREA)

Applications Claiming Priority (1)

Publications (2)

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Family Applications (1)

Country Status (2)

Cited By (4)

Family Cites Families (6)

• 2009
  • 2009-03-26 DE DE200910015011 patent/DE102009015011A1/de not_active Withdrawn
• 2010
  • 2010-03-23 EP EP10157361A patent/EP2233379A3/fr not_active Withdrawn

Non-Patent Citations (1)

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