Theoretical analysis of the mechanical system for a fiber optic seismic sensor

E. Smeu; N. N. Puscas

doi:10.1117/12.639743

14 December 2005 Theoretical analysis of the mechanical system for a fiber optic seismic sensor

E. Smeu, N. N. Puscas

Proceedings Volume 5972, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies II; 59720X (2005) https://doi.org/10.1117/12.639743
Event: Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies II, 2004, Bucharest, Romania

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.

Citation Download Citation

E. Smeu and N. N. Puscas "Theoretical analysis of the mechanical system for a fiber optic seismic sensor", Proc. SPIE 5972, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies II, 59720X (14 December 2005); https://doi.org/10.1117/12.639743

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