TY - GEN
T1 - Relative-story displacement sensor for measuring five-degree-of-freedom movement of building layers
AU - Matsuya, Iwao
AU - Katamura, Ryuta
AU - Sato, Maya
AU - Iba, Miroku
AU - Kondo, Hideaki
AU - Kanekawa, Kiyoshi
AU - Takahashi, Motoichi
AU - Hatada, Tomohiko
AU - Nitta, Yoshihiro
AU - Tanii, Takashi
AU - Shoji, Shuichi
AU - Nishitani, Akira
AU - Ohdomari, Iwao
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
KW - 5-DOF measurement
KW - Damage Evaluation
KW - Inclination Angle
KW - PSD
KW - Position Sensitive Detector
KW - Relative-Story Displacement
KW - Story Drift
KW - Structural Health Monitoring
KW - Torsion Angle
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UR - http://www.scopus.com/inward/citedby.url?scp=79956309895&partnerID=8YFLogxK
U2 - 10.1117/12.871138
DO - 10.1117/12.871138
M3 - Conference contribution
AN - SCOPUS:79956309895
SN - 9780819485434
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011
T2 - Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011
Y2 - 7 March 2011 through 10 March 2011
ER -