FMA Software

FMA Evaluation Software


The FMA software was developed by SIEMENS for post-evaluation of height and stagger measurements. We then developed it further to offer the OVHWizard system user the following possibilities by direct interaction with the OVHWizard software:


Checking the specified basic data of the line
Combining the measured data with existing measured basic data of the measuring line
Synchronisation of the measured data with existing line data
Automatic determination of pole and dropper positions
Determination of the tolerances for the measurement by design types from the railway regulations (e.g. Re 160, Re 200, Sicat etc.)
Monitoring of the permissible wind deflection
Monitoring of the span length steps and the gradients
Creation of a report according to railway specifications
Comparison of the measurements with and without uplift and determination of elasticity
Creation of a list of necessary corrections with values for the correction


After recording a measurement with the OVHWizard software, the FMA software is started with it and the measurement file is read in. The project data such as line designation, track, measured section, type of contact line, rated contact wire height, wind velocity and data for the later output format for this measurement file are then loaded. Then the previously tested basic data for track and contact line are loaded. The basic data can be viewed together with the measured data in a preview. Then the basic data and measured data are shifted manually over each other at significant points at the beginning and end of the measurement and then synchronised automatically. This eliminates any differences in the distance measurement by measuring wheel slip or inaccurate specification of the wheel diameter.

The software then automatically determines the deviations from the specifications at the pole and dropper locations and writes this deviation as an error code in different colours to the pole locations or the span length step according to whether a warning or tolerance value is exceeded.


Grafische Vorschau der Höhen- und Seitenlage in der FMA mit Toleranzband
Graphical preview of the height and stagger in the FMA with tolerance band


The determined values can be printed together with the graphic display of the measured values and the tolerance band in table form as a report. The cover sheet of the report contains the general information about the line data of the measurement and the temperature during the measurement and an overview list of all the errors occurring in the measured section separated according to error code. Then all measured values are listed separately in a table according to pole and dropper positions.


Auflistung der Messwerte in dem FMA Report
List of measured values in the FMA report


FMA Report
List of measured values in the FMA report




OVHWizard in operation in Gotthard base tunnel

OVHWizard measures conductor rail


OVHWizard is