An experimental study on relative displacement sensing using phototransistor array for building structures

Kiyoshi Kanekawa; Iwao Matsuya; Maya Sato; Ryota Tomishi; Motoichi Takahashi; Satoru Miura; Yasutsugu Suzuki; Tomohiko Hatada; Ryuta Katamura; Yoshihiro Nitta; Takashi Tanii; Shuichi Shoji; Akira Nishitani; Iwao Ohdomari

doi:10.1002/tee.20524

An experimental study on relative displacement sensing using phototransistor array for building structures

Kiyoshi Kanekawa^*, Iwao Matsuya, Maya Sato, Ryota Tomishi, Motoichi Takahashi, Satoru Miura, Yasutsugu Suzuki, Tomohiko Hatada, Ryuta Katamura, Yoshihiro Nitta, Takashi Tanii, Shuichi Shoji, Akira Nishitani, Iwao Ohdomari

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

We propose a novel sensor for directly measuring the relative displacement of a building structure. The sensor is composed of a laser light source and a phototransistor (PT) array. The PT array is immobilized on the floor together with a photo scattering plate made of glass, whereas the laser light source is separately immobilized on the ceiling. The photo scattering plate is placed in front of the PT array and distributes the laser beam on the multiple PTs. The relative displacement between the ceiling and the floor is estimated by the distribution of the PT output voltages, and the displacement is estimated with a resolution finer than the interval between the PTs. The accuracy of the relative displacement sensor (RDS) is experimentally assessed by conducting a shaking table test exhibiting several waves from harmonic sinusoidal waves to real seismic waves. We discuss the feasibility of real-time monitoring system utilizing this sensor.

Original language	English
Pages (from-to)	251-255
Number of pages	5
Journal	IEEJ Transactions on Electrical and Electronic Engineering
Volume	5
Issue number	2
DOIs	https://doi.org/10.1002/tee.20524
Publication status	Published - 2010 Mar

Keywords

Building structure
Health monitoring
Inter-story displacement measurement
Laser
Photo scattering
Phototransistor
Position sensing

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1002/tee.20524

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Kanekawa, K., Matsuya, I., Sato, M., Tomishi, R., Takahashi, M., Miura, S., Suzuki, Y., Hatada, T., Katamura, R., Nitta, Y., Tanii, T., Shoji, S., Nishitani, A., & Ohdomari, I. (2010). An experimental study on relative displacement sensing using phototransistor array for building structures. IEEJ Transactions on Electrical and Electronic Engineering, 5(2), 251-255. https://doi.org/10.1002/tee.20524

Kanekawa, K, Matsuya, I, Sato, M, Tomishi, R, Takahashi, M, Miura, S, Suzuki, Y, Hatada, T, Katamura, R, Nitta, Y, Tanii, T, Shoji, S, Nishitani, A & Ohdomari, I 2010, 'An experimental study on relative displacement sensing using phototransistor array for building structures', IEEJ Transactions on Electrical and Electronic Engineering, vol. 5, no. 2, pp. 251-255. https://doi.org/10.1002/tee.20524

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abstract = "We propose a novel sensor for directly measuring the relative displacement of a building structure. The sensor is composed of a laser light source and a phototransistor (PT) array. The PT array is immobilized on the floor together with a photo scattering plate made of glass, whereas the laser light source is separately immobilized on the ceiling. The photo scattering plate is placed in front of the PT array and distributes the laser beam on the multiple PTs. The relative displacement between the ceiling and the floor is estimated by the distribution of the PT output voltages, and the displacement is estimated with a resolution finer than the interval between the PTs. The accuracy of the relative displacement sensor (RDS) is experimentally assessed by conducting a shaking table test exhibiting several waves from harmonic sinusoidal waves to real seismic waves. We discuss the feasibility of real-time monitoring system utilizing this sensor.",

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author = "Kiyoshi Kanekawa and Iwao Matsuya and Maya Sato and Ryota Tomishi and Motoichi Takahashi and Satoru Miura and Yasutsugu Suzuki and Tomohiko Hatada and Ryuta Katamura and Yoshihiro Nitta and Takashi Tanii and Shuichi Shoji and Akira Nishitani and Iwao Ohdomari",

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AU - Tomishi, Ryota

AU - Takahashi, Motoichi

AU - Miura, Satoru

AU - Suzuki, Yasutsugu

AU - Hatada, Tomohiko

AU - Katamura, Ryuta

AU - Nitta, Yoshihiro

AU - Tanii, Takashi

AU - Shoji, Shuichi

AU - Nishitani, Akira

AU - Ohdomari, Iwao

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AB - We propose a novel sensor for directly measuring the relative displacement of a building structure. The sensor is composed of a laser light source and a phototransistor (PT) array. The PT array is immobilized on the floor together with a photo scattering plate made of glass, whereas the laser light source is separately immobilized on the ceiling. The photo scattering plate is placed in front of the PT array and distributes the laser beam on the multiple PTs. The relative displacement between the ceiling and the floor is estimated by the distribution of the PT output voltages, and the displacement is estimated with a resolution finer than the interval between the PTs. The accuracy of the relative displacement sensor (RDS) is experimentally assessed by conducting a shaking table test exhibiting several waves from harmonic sinusoidal waves to real seismic waves. We discuss the feasibility of real-time monitoring system utilizing this sensor.

KW - Building structure

KW - Health monitoring

KW - Inter-story displacement measurement

KW - Laser

KW - Photo scattering

KW - Phototransistor

KW - Position sensing

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An experimental study on relative displacement sensing using phototransistor array for building structures

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