Measuring Relative-Story Displacement and Local Inclination Angle Using Multiple Position-Sensitive Detectors

Sensors

Iwao Matsuya¹  Ryuta Katamura²  Maya Sato¹  Miroku Iba¹  Hideaki Kondo¹  Kiyoshi Kanekawa¹  Motoichi Takahashi²  Tomohiko Hatada²  Yoshihiro Nitta³  Takashi Tanii¹  Shuichi Shoji¹  Akira Nishitani¹ 

[1] Faculty of Science and Engineering, Waseda University, Okubo 3-4-1, Shinjuku, Tokyo, Japan; E-Mails:;Kajima Technical Research Institute, Kajima Corporation, Tamagawa1-36-1, Chofu, Tokyo, Japan; E-Mails:;Department of Architecture, Ashikaga Institute of Technology, Ohmae-Cho 268-1, Ashikaga, Tochigi, Japan; E-Mail:

关键词: structural health monitoring;    local inclination angle;    relative-story displacement;    position-sensitive detector;    PSD;   

DOI  :  10.3390/s101109687

来源: mdpi

【 摘 要 】

We propose a novel sensor system for monitoring the structural health of a building. The system optically measures the relative-story displacement during earthquakes for detecting any deformations of building elements. The sensor unit is composed of three position sensitive detectors (PSDs) and lenses capable of measuring the relative-story displacement precisely, even if the PSD unit was inclined in response to the seismic vibration. For verification, laboratory tests were carried out using an Xθ-stage and a shaking table. The static experiment verified that the sensor could measure the local inclination angle as well as the lateral displacement. The dynamic experiment revealed that the accuracy of the sensor was 150 μm in the relative-displacement measurement and 100 μrad in the inclination angle measurement. These results indicate that the proposed sensor system has sufficient accuracy for the measurement of relative-story displacement in response to the seismic vibration.

【 授权许可】

CC BY   
© 2010 by the authors; licensee MDPI, Basel, Switzerland.