Relative-story displacement sensor for measuring five-degree-of-freedom movement of building layers

Iwao Matsuya, Ryuta Katamura, Maya Sato, Miroku Iba, Hideaki Kondo, Kiyoshi Kanekawa, Motoichi Takahashi, Tomohiko Hatada, Yoshihiro Nitta, Takashi Tanii, Shuichi Shoji, Akira Nishitani, Iwao Ohdomari

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

We have developed a novel relative-story displacement sensor capable of measuring the 5-degree-of-freedom movement of building layers for structural health monitoring. Three pairs of infrared-light emitting diode arrays and positionsensitive detector units were used for simultaneously measuring the relative-story displacement, the inclination angle of the lower layer, and the torsion angle between two adjacent layers. For verification, laboratory tests were carried out using a shaking table, a motorized micrometer and a rotation stage. In the static experiment, it is verified that the local inclination angle and the torsion angle can be measured as well as the relative-story displacement using the sensor system. The resolution of the sensor system in the displacement measurement, that in the inclination angle measurement, and that in the torsion angle measurement were evaluated to be 0.10 mm, 34.4 μrad, and 14.6 μrad, respectively. In the dynamic response experiment, the accuracy of the sensor system was experimentally evaluated to be 0.20 mm in the relative-displacement measurement, 110 μrad in the inclination angle measurement, and 90 μrad in the torsion angle measurement, respectively. These results indicate that the developed sensor system has a sufficient accuracy for the structural health diagnostics of buildings.

Original languageEnglish
Title of host publicationSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011
DOIs
Publication statusPublished - 2011 May 26
EventSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011 - San Diego, CA, United States
Duration: 2011 Mar 72011 Mar 10

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7981
ISSN (Print)0277-786X

Conference

ConferenceSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011
CountryUnited States
CitySan Diego, CA
Period11/3/711/3/10

Keywords

  • 5-DOF measurement
  • Damage Evaluation
  • Inclination Angle
  • PSD
  • Position Sensitive Detector
  • Relative-Story Displacement
  • Story Drift
  • Structural Health Monitoring
  • Torsion Angle

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Matsuya, I., Katamura, R., Sato, M., Iba, M., Kondo, H., Kanekawa, K., Takahashi, M., Hatada, T., Nitta, Y., Tanii, T., Shoji, S., Nishitani, A., & Ohdomari, I. (2011). Relative-story displacement sensor for measuring five-degree-of-freedom movement of building layers. In Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011 [79810C] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7981). https://doi.org/10.1117/12.871138