Monitoring the Dynamic Displacements of Railway Track

The development and testing of two independent and innovative techniques for measuring rail displacements is the focus of this paper. Of the two techniques, one combines remote video monitoring with particle image velocimetry, via the use of both a webcam and a small telescope. The second technique uses sleeper -mounted geophones to give a voltage output that is proportional to the velocity of motion. The voltage output can be filtered and integrated to calculate displacements. The research uses data from three different railway track and/or train speed standards collected in the field in order to explore and quantify the limitations of each system. Laboratory validation tests show that a video monitoring system can measure peak-to-peak displacements to within 0.04 mm, from a distance of 15 m for frequencies of less than 4 Hz. Using geophones, measurements of peak-to-peak displacements are found to be within 0.07 mm for frequencies as low as 1 Hz.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09544097
• Authors:
  • Bowness, D
  • Lock, A C
  • Powrie, W
  • Priest, J A
  • Richards, D J
• Publication Date: 2007-3

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 13-22
• Serial:
  • Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit
  • Volume: 221
  • Issue Number: 1
  • Publisher: Sage Publications Limited
  • ISSN: 0954-4097
  • EISSN: 2041-3017
  • Serial URL: http://pif.sagepub.com/content/current

Subject/Index Terms

• TRT Terms: Deflection; Deflection tests; Field tests; Frequency (Electromagnetism); Geophones; Laboratory tests; Measurement; Monitoring; Railroad tracks; Video imaging detectors
• Uncontrolled Terms: Train speed
• Subject Areas: Railroads;

Filing Info

• Accession Number: 01051744
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 3 2007 9:00PM