Smart Structures and Systems

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Comparative study on displacement measurement sensors for high-speed railroad bridge

  • Cho, Soojin (Department of Civil Engineering, University of Seoul) ;
  • Lee, Junhwa (School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology) ;
  • Sim, Sung-Han (School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology)
  • Received : 2017.12.19
  • Accepted : 2018.03.31
  • Published : 2018.05.25
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Abstract

This paper presents a comparative study of displacement measurement using four sensors that are being used in the field: they are a ring gauge, a laser Doppler vibrometer (LDV), a vision-based displacement measurement system (VDMS), and an optoelectronic displacement meter (ODM). The comparative study was carried out on a brand-new high-speed railroad bridge designed to produce displacements within a couple of millimeters under the loading of a high-speed train. The tests were carried out on a single-span steel plate girder bridge two times with different train loadings: KTX and HEMU. The measured displacement is compared as raw and further discussion was made on the measurement noise, peak displacement, and frequency response of four sensors. The comparisonsare summarized to show the pros and cons of the used sensors in measuring displacement at a typical high-speed railroad bridge.

Keywords

Acknowledgement

Supported by : University of Seoul

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