The intelligent intermediate layer The wayside train monitoring system MONI revolutionized by the simplicity of installation and operation all previous developments. MONI is a powerful, autonomous system for the monitoring of rail traffic, noise and the sound and vibration detection under operating conditions.


MONI takes over these functions independently:

  • Electronic wagon master
  • Reliable, trustworthy inspector
  • Automatic train watchers
  • Early warning that exceeded the threshold

This MONI provides:

  • The basis for condition-based maintenance of vehicle and track.
  • To demonstrate compliance or non-compliance with various limits for vehicle driving and track.
  • The prerequisite for stress-related and noise-related track access charges.
  • Decision-making tools to increase speed, axle load and traffic density.

MONI constantly monitors itself and reports faults immediately, automatically calibrates itself, is mobile, flexible and easy to use.


Technical Solution

The heart of the monitoring system is the MONI sensor that is installed in the rail bar attachment as a normal lintermediate layer It allows an indirect detection of the rail-threshold power by exploiting the elastic properties of the rail.

Depending sleeper a MONI-set is fitted with 2 MONI sensors including electronics.

The processing of data occurs in a self-developed modular software. Data are available for about 2 minutes after a train passes.


Operating Times

Since April 2008 MONI is as initial installation in an operational track the DB with mixed traffic, an axle load of 22.5 t and a maximum driving speed of 160 km / h being installed. Directly in front is a LASCAa® system, which was also manufactured by INNOtec Systems GmbH, built and is maintained. Through this local proximity a constant comparison and mutual verification of the two systems is possible.

This initial installation of the MONI running since the installation without interference, and provides continuous data. Thus, the railway standards is demonstrated.

About this comparison operation, a journal article in the Railway Technical Observations ETR March 2009 and in Railroad Technical Review RTR March 2009 has already been published.

Tecnical Information


Advantages at a glance

  • Very good value for money ratio
  • Installation time per MONI 5 minutes (!).
  • Full operational readiness of MONI measuring point with 2 x 7 MONI sensors after 2 hours (!).
  • Modular construction with pre-calibrated standard components.
  • Use in all forms of superstructure and all types of rails.
  • Suitable for all speed ranges.
  • Installation without overhead construction in natural train breaks.
  • Static, dynamic or fully automatic calibration.
  • Mobile or stationary use.
  • No influence of track maintenance measures (grinding, plugs, etc.).
  • Maintenance and repair through the railway staff after training possible.

Data Supply

General data

  • Velocity, acceleration.
  • Total train weight and individual weight vehicle with an accuracy of a few percent depending on the number of sensors and track quality.
  • Vehicle detection.
  • Train length, number of vehicles, number of axles, axle geometries, driving speed.
  • Vehicle identification numbers of all vehicles with transponders.

Masses, forces and loads

  • Percentage load shifts (in axis, bogie and vehicle).
  • Dynamic running behavior.
  • Incorrectly set bogies.

Track and superstructure load

  • Monitoring the track class.
  • Monitoring the maintenance class.
  • Measurement of the static force into the superstructure.
  • Measurement of the dynamic force into the superstructure.

Wheel defects

  • Detection and evaluation of stochastic wheel out of round units (flats, flattening, spalling).
  • Polygonisation
  • Wheel accurate detection of airborne and structure borne sound.