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Keywords: railway turnout, condition monitoring, field test, dynamic frequency response function.

Summary

Two measuring systems ESAH-M and a video gauge are used for condition monitoring of railway turnouts. Both systems will be used in a structural health monitoring system (SHMS) for railway turnouts to be developed at the Delft University of Technology. The ESAH-M system equipped with a 3-D acceleration sensor (to be mounted on the crossing nose) and a sleeper displacement sensor can measure the three-dimensional dynamic accelerations of the crossing nose and the vertical displacements of the sleeper. The video gauge system makes a video record using special cameras to detect the movements of the targets set on the rail (or sleeper) by analysing the recorded videos. One of main advantages of the video gauge is that it can be used outside the track, which is, considering the tough safety requirements in the Netherlands, quite important. A number of measurements on turnouts of various types and conditions have been conducted in different places in the Netherlands using both measurement systems. The collected measurement data was analysed in time and frequency domains in order to assess the influence of the different components of the turnout on its dynamic responses. The measurements performed on a turnout before and after tamping have indicated that the vertical acceleration of the crossing was dramatically reduced after tamping. Also, from the analysis of the measurement results, it was observed that the frequency composition of the dynamic responses of the turnout after tamping has been changed. Additionally, a comparison of the results obtained from each system has been performed. A detailed overview of the results obtained using both systems is presented and discussed in this paper. Some conclusions and recommendations regarding the integration of these systems in the SHMS for railway turnouts are given.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 104 PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 210 Dynamic Experimental Tools for Condition Monitoring of Railway Turnout Crossing X. Liu¹, V.L. Markine¹ and I. Shevtsov² ¹Department of Road and Railway Engineering, Delft University of Technology, the Netherlands ²ProRail, Utrecht, the Netherlands doi:10.4203/ccp.104.210 purchase the full-text of this paper Full Bibliographic Reference for this paper X. Liu, V.L. Markine, I. Shevtsov, "Dynamic Experimental Tools for Condition Monitoring of Railway Turnout Crossing", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 210, 2014. doi:10.4203/ccp.104.210 Keywords: railway turnout, condition monitoring, field test, dynamic frequency response function. Summary Two measuring systems ESAH-M and a video gauge are used for condition monitoring of railway turnouts. Both systems will be used in a structural health monitoring system (SHMS) for railway turnouts to be developed at the Delft University of Technology. The ESAH-M system equipped with a 3-D acceleration sensor (to be mounted on the crossing nose) and a sleeper displacement sensor can measure the three-dimensional dynamic accelerations of the crossing nose and the vertical displacements of the sleeper. The video gauge system makes a video record using special cameras to detect the movements of the targets set on the rail (or sleeper) by analysing the recorded videos. One of main advantages of the video gauge is that it can be used outside the track, which is, considering the tough safety requirements in the Netherlands, quite important. A number of measurements on turnouts of various types and conditions have been conducted in different places in the Netherlands using both measurement systems. The collected measurement data was analysed in time and frequency domains in order to assess the influence of the different components of the turnout on its dynamic responses. The measurements performed on a turnout before and after tamping have indicated that the vertical acceleration of the crossing was dramatically reduced after tamping. Also, from the analysis of the measurement results, it was observed that the frequency composition of the dynamic responses of the turnout after tamping has been changed. Additionally, a comparison of the results obtained from each system has been performed. A detailed overview of the results obtained using both systems is presented and discussed in this paper. Some conclusions and recommendations regarding the integration of these systems in the SHMS for railway turnouts are given. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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