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Proceedings Paper

Theoretical analysis of the mechanical system for a fiber optic seismic sensor
Author(s): E. Smeu; N. N. Puscas
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Paper Abstract

All fiber optic seismic sensors contain a mechanical system which determines the optics to encode somehow the ground motion when an earthquake occur. This system basically consists in an inertial mass fixed on an elastic element. The first condition for a proper earthquake detection is determined by the ability of the mechanical system to reproduce accurately enough the movement of the ground. In this paper we report some theoretical results concerning this problem, and especially the conditions which must be accomplished by the mechanical system in two usual frequency ranges (both far of its natural frequency). This is done by analitically solving the motion differential equation of the mechanical system for a simple forcing (which stands for the earthquake) and numerical simulation.

Paper Details

Date Published: 14 December 2005
PDF: 7 pages
Proc. SPIE 5972, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies II, 59720X (14 December 2005); doi: 10.1117/12.639743
Show Author Affiliations
E. Smeu, Univ. Politehnica of Bucharest (Romania)
N. N. Puscas, Univ. Politehnica of Bucharest (Romania)

Published in SPIE Proceedings Vol. 5972:
Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies II
Ovidiu Iancu; Adrian Manea; Paul Schiopu; Dan Cojoc, Editor(s)

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