Project description:
RailScan demagnetisation device to determine stress-free temperature of continouos welded rails on the non-destructive principle

Project starting and ending dates:
2010.04.01 - 2011.09.30.

Project reg. nr.:

Supporting organisation:
National Office for Research and Technology (NKTH)

Assisting organisation:
ÉARFÜ Észak-Alföldi Regional Development Agency
Non-Profit Public Benefit Ltd.

Project summary:
Project aim is to further improve our previous meter device named RailScan, that has been originally developed on the principle of non-destructive testing (NDT) methods to determine stress-free (neutral) temperature (SFT) of rails, by adding a newly developed demagnetisation unit.
Demagnetisation unit should eliminate disturbing signals originating from self-magnetisation of rails by the means of compensation that destroy data aquisition about neutral temperature of rails. During development we also focus on retaining easy handling, simple operation and less possible energy consumption.
As a result, improvement will help device perform more reliable measurements and deliver data with increased accuracy that may raise both demand and strenghten market positions on home and international markets, too.
The demagnetisation unit is working with a new method of measuring remanent magnetisation that will also serve as a basis for further new products.
Main objectives set to contribute to raise work efficiency:

  • Examination of remanent magnetisation effects on magnetic Barkhausen noise (MBN) under laboratory circumstances
  • Creation of an MBN excitation equipment with built-in demagnetisation unit, then investigation of MBN – stress relationship both on demagnetised testing units and those with remanent magnetisation
  • After evaluation of laboratory examination results a meter device for field testing purposes will be constructed
  • After device improvements based on field tests it is necessary to check meter device with special regard to application in the railway industry and the requirements in connection with railway traffic safety.
  • A prototype will be built after consideration of feedback and experiences with the railway. Application of design patent.