Installation of the FTS acoustic sounding system at the Belarusian Railway.


OPTICAL BLOCK – sends laser pulses along the optical fiber, measures backscattering intensity and transmits signals in real time.

Information Processing Block – converts signals into power spectra, classifies registered events using processing algorithms, using filters.

APPLICATION BLOCK – adds coordinates, transmits information packets to the data bank and for display on the user interface; gives out alarm signals.

BLOCK USER INTERFACE – provides a clearly structured output of information.


Experienced site Fiber Optic Cable Installing the pendant equipment

Plot Dubrava – Molodechno – Smorgon, length of 72 km

As a distributed acoustic sensor, a fiber optic fiber cable laid on a section along the railway track will be used

The monitoring unit is installed in the Communications House at Molodechno station

Double-track trunk line

Over the entire length of the section the cable is laid in the ground
    3 AWPs will be installed properly:
  • House of Communication, Art. Molodechno
  • Molodechno distance of track
  • Design and Technical Center




  • The FTS monitoring unit is installed at Molodechno station.

Works connected with optical cable:

  • Endpoints installed
  • Optical fiber welding work completed
  • At the customer’s request, the optical cable will be spliced in order to reach a length of 72 km. The system and FDU will need to be modified accordingly.

Configuring the System

  • Configuration of the optical unit is completed
  • The latest version (5.3.4) of the processing unit software has been downloaded.
  • FTS system is active, basic configuration is applied
  • The application block is configured to transfer xml to the FDU user interface
  • The FDU is functioning normally
  • Further configuration of the FDU and geo-calibration unit, in order to improve the accuracy of the display of passenger train stops at the stations on the FDU.
  • he system is configured for remote access. Provided remote access from the office in the United Kingdom.
  • The basic functionality of issuing alarms for detecting rail / wheel defects is applied.


  • Collecting data for geo-calibration.
  • Opto-fiber segmentation was made.
  • Main geo-calibration applied.
  • Further geo-calibration has been done.
  • Further configuration of the FDU and geo-calibration unit, in order to improve the accuracy of the display of passenger train stops at the stations on the FDU.

Functionality testing and data collection

  • Detection of defects in rails and wheels was demonstrated on the application block monitor
  • The data of the FTS system was recorded for comparison with the data recorded by the customer’s vibration sensor
  • The resulting screenshots showed the typical signatures of trains following the site, rail / wheel defects and normal operation of the FDU. The acoustic trace of the slider is very clearly expressed.
  • Further geo-calibration has been done.
  • Demonstrating to the customer the fault monitoring functionality on the application monitor and the operation of the FDU


  • Work has begun on configuring defect detection and alarm reporting.

The architecture of the CAS system



Tracking the movement of rolling stock Monitoring of the condition of devices and objects of infrastructure and rolling stock Ensuring the protection of infrastructure and personnel
  • Location control.
  • Speed control.
  • Monitoring the direction of travel.
  • Calculation of expected time of arrival to the next station.
  • Rail defect monitoring;
  • Control of wheel defect, wheel surface defects of rolling stock wheels.
  • Control of unauthorized access to infrastructure facilities: opening of travel boxes, couplings, cabinets, cable pits, etc. (up to 2 meters from the cable) where possible
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