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Proceedings Paper

Laser crosshair projection technique for interstory drift measurement
Author(s): Kim D. Bennett; Cynthia B. Batroney
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Paper Abstract

A new method is proposed for measuring interstory drift, the shifting of floors relative to one another when a building undergoes wind or earthquake loading. A laser crosshair is projected from one story to the next, and onto a set of photodetectors which sense changes in the position of the projected light. This paper reports the theory of operation and a quasi-static verification of the method using micropositioning stages to provide input displacements. Lateral positions, including translational and rotational components are calculated from the photodetector outputs, and show excellent agreement with input displacements. The overall performance of the sensor system is extremely linear and predictable, and appears robust enough for field deployment.

Paper Details

Date Published: 25 October 1996
PDF: 9 pages
Proc. SPIE 2839, Fiber Optic and Laser Sensors XIV, (25 October 1996); doi: 10.1117/12.255365
Show Author Affiliations
Kim D. Bennett, Lafayette College (United States)
Cynthia B. Batroney, Lafayette College (United States)

Published in SPIE Proceedings Vol. 2839:
Fiber Optic and Laser Sensors XIV
Ramon P. DePaula; John W. Berthold III, Editor(s)

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