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Proceedings Article

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

[+] Author Affiliations
Iwao Matsuya, Maya Sato, Miroku Iba, Hideaki Kondo, Kiyoshi Kanekawa, Takashi Tanii, Shuichi Shoji, Akira Nishitani, Iwao Ohdomari

Waseda Univ. (Japan)

Ryuta Katamura, Motoichi Takahashi, Tomohiko Hatada

Kajima Corp. (Japan)

Yoshihiro Nitta

Ashikaga Institute of Technology (Japan)

Proc. SPIE 7981, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011, 79810C (April 13, 2011); doi:10.1117/12.871138
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From Conference Volume 7981

  • Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011
  • Masayoshi Tomizuka
  • San Diego, California, USA | March 06, 2011

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.

© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

Iwao Matsuya ; Ryuta Katamura ; Maya Sato ; Miroku Iba ; Hideaki Kondo, et al.
"Relative-story displacement sensor for measuring five-degree-of-freedom movement of building layers", Proc. SPIE 7981, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011, 79810C (April 13, 2011); doi:10.1117/12.871138; http://dx.doi.org/10.1117/12.871138


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