Track diagnostics - FMK-007 track measuring wagon

Measuring systems

FMK-007 measuring car performs track geometry and vehicle dynamics measurements in several Central European countries. It is not self-propelled, it was built in Hungary in 2001 with the reconstruction of an IC wagon.
The measurement results – in case of both measuring systems - are available for the customer in print and in electronic form immediately after the completion of the measurement, for which section data and GNSS coordinates are ordered by the measuring system. An office system helps to display, further evaluate and analyse the measuring results.

Technical data:

Length:26,4 m
Axle load:14 t
Max measuring speed:160 km/h

Track geometry measuring system

The track geometry measuring system is non-contact, in other words the measurement results are provided by the laser measuring units attached to the bottom of the wagon, or by the inertial unit.
The measuring system is also capable providing alignment and longitudinal level (sinking) diagrams on distortion free base and on original or on any chord base. The cross section is determined with the inertial unit. The twist can be calculated for different bases.

Measured track geometry characteristics:

  • Gauge
  • Cross level /superelevation/
  • Twist
  • on 5 different bases
  • Longitudinal level /sinking/
  • on original or on any chord, and in D1 or D2 wavelength range
  • Alignment
    on original or on any chord, and in D1 or D2 wavelength range
  • Gauge-changing
    on any base
  • Average-gauge
    on any base
  • Curvature
  • Twist-differences
    on 5 different bases
  • Longitudinal level /sinking/ moving standard deviation
    on any base

Main services:

  • Measuring graphs - different measuring limits with objects
  • List of local defects – taking into account different measuring limits
  • General track condition judgment measuring and qualification numbers – at any length

Vehicle dynamic measuring system

The vehicle dynamic measurement is based on the results of the 24 accelerometer sensors installed on different places of the vehicle. Its purpose is to quantify the additional accelerations and forces awakening in the track vehicle system and acting on the passengers passing over track defects.

Vehicle dynamic parameters:

Safety characteristics:

  • Derailment safety
  • Supplementary derailment safety
  • Track safety

Track load characteristics:

  • Vertical track overloading
  • Vertical rail overloading
  • Transverse force acting on the track

Comfort characteristics:

  • Transverse dynamic swing force
  • Longitudinal dynamic swing force
  • Quasi-static transverse comfort
  • Uncompensated lateral acceleration

Main services:

  • Measuring graphs - different measuring limits with objects
  • Local defect list - taking into account different measuring limits
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