application
   Derailing 
    safety, riding quality, wear-and-tear behavior... 
  ... are primarily determined by wheel-load differences on the vehicle and 
    the bogies. In order to comply with the specified tolerances
	for the wheel load differences of the entire vehicle, it is necessary to check
	bogies for minimal wheel load differences and eliminate 
    impermissible deviations by adjustment of the spring pre-stressing. For these 
    measurements and adjustment work, the bogie is to be located at the bearing 
    points with the constructive or bearing forces of the freight- car body technically 
    measured in the bogie tester. 
     
  advantages
  
    - complete plant building or refitting sets in existing facilities with 
      measurement computer as well as all measurement and control components
 
    - self diagnosis system for error recognition
 
    - computer controlled sequence of testing and adjustment processes
 
    - easy adjustment work of the given technological sequences and vehicular 
      data by flexible software
 
    - automatic control of measurement and loading operations on the basis of 
      direct digital regulation
 
    - minimum maintenance needed
 
    - option: high accuracy determination of bogie geometrics e.g. axle differences
 
   
  design
   The 
    bogie tester consists of the hydraulic aggregate, machine computer and MSR 
    component groups, including the laser-optical measurement unit.  
  
    - measurement track
 
    - pressure framework
 
    - hydraulic unit for load application
 
    - measurement control
 
    - option: geometric measurement system
 
   
  measurement track 
  The bogie to be inspected is set onto the measurement track. Run on bearings 
    and spring bedded articulation-guided measurement tracks for the measurement 
    of wheel-loads, are arranged on load cells on the measurement track. 
  pressure framework 
  It traverses the measurement track. Hydraulic cylinders for stressing of 
    the bogie, are arranged vertically on the pressure framework. The two outer 
    cylinders can be adjusted to be diagonal to the track corresponding to the 
    interval of the outer support bearing on the boogie; the middle cylinder is 
    attached fast. 
  measurement computer 
  The computer consists of an LCD operator’s terminal, process entry 
    for force and pressure, process output for servo-valves and control of the 
    hydraulic aggregate as well as interface [building] groups for peripheral 
    devices and networking, e.g. an attached printer. After starting the test 
    procedure, the bogie is loaded according to the theoretical values via DDC. 
    Upon exceeding the permissible wheel-load differences in the bogie, load alleviation, 
    setting and loading repeat themselves cyclically. At the conclusion of the 
    inspection procedure, an inspection protocol is drafted and the bogie data 
    is filed in a databank. 
    Beside the programs for the inspection processes, the software includes the 
    operational complexes of an operating system with integrated monitoring of 
    the flawless operation, diagnosis for all operational complexes, calibration 
    of the measurement chains and processed volume regulation. 
    The laser-optical measurement unit detects the axle positioning as well as 
    the height setting of the bogie during the process. 
  option: geometric measurement system 
  Since test processes whether required by law or by company guidelines may 
    also require the measurement of geometric bogie values PRODATs testing plants 
    can be equipped with a geometric measurement system. The devices enables three-dimensional measurements of 
    coordinats with very high accuracy. 
  samples
  
keywords 
bogie testing plants, bogie test banches, bogie quality control and test systems, modularized, wheel load, test, geometric, measurements satisfying: DIN 27201, DIN EN 16235, measurement system in accordance to DIN ISO EN 7500-1,  
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