An Experimental Study on Relative Displacement Sensing Using Phototransistor Array for Building Structures

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

来源：IEEJ Transactions on Electrical and Electronic Engineering, 2010, 5(2): 251-255.

DOI：10.1002/tee.20524

• health monitoring
• building structure
• position sensing
• inter-story displacement measurement
• phototransistor
• laser
• photo scattering

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) at-ray. 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 oil 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.

• 出版日期2010-3