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Proceedings Paper

Tunable mechanical monolithic sensors for large band low frequency monitoring and characterization of sites and structures
Author(s): F. Barone; G. Giordano; F. Acernese; R. Romano
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Paper Abstract

Among the different mechanical architectures present in literature, the Watts linkage is one of the most promising ones for the implementation of a new class of mechanical accelerometers (horizontal, vertical and angular). In this paper, we present monolithic implementations of uniaxial and triaxial mechanical seismometers and accelerometers based on the UNISA Folded Pendulum mechanical configuration, optimized for low frequency characterization of sites (including underground sites) and structures as inertial sensor (seismometer). This mechanical architecture allows the design and implementation of very large band monolithic sensors (10-7Hz 102 Hz), whose sensitivities for the most common applications are defined by the noise introduced by their readouts (e.g. ¡ 10-12 m/sqrt(Hz) with classical LVDT readouts). These unique features, coupled other relevant properties like scalability, compactness, lightness, high directivity, frequency tunability (typical resonance frequencies in the band 10-1 Hz 102 Hz), very high immunity to environmental noises and low cost make this class of sensors very effective for the implementation of uniaxial (horizontal and/or vertical) and triaxial seismometers and accelerometers for ground, space and underwater applications, including UHV and cryogenics ones. Typical applications of this class of monolithic sensors are in the field of earthquake engineering, seismology, geophysics, civil engineering, characterization of sites (including underground sites), structures (e.g. buildings, bridges, historical monuments), and, in general, in all applications requiring large band-low frequency performances coupled with high sensitivities and compactness.

Paper Details

Date Published: 21 October 2016
PDF: 11 pages
Proc. SPIE 9986, Unmanned/Unattended Sensors and Sensor Networks XII, 99860C (21 October 2016); doi: 10.1117/12.2242080
Show Author Affiliations
F. Barone, Univ. degli Studi di Salerno (Italy)
Istituto Nazionale di Fisica Nucleare (Italy)
G. Giordano, Univ. degli Studi di Salerno (Italy)
F. Acernese, Univ. degli Studi di Salerno (Italy)
Istituto Nazionale di Fisica Nucleare (Italy)
R. Romano, Univ. degli Studi di Salerno (Italy)
Istituto Nazionale di Fisica Nucleare (Italy)

Published in SPIE Proceedings Vol. 9986:
Unmanned/Unattended Sensors and Sensor Networks XII
Edward M. Carapezza; Panos G. Datskos; Christos Tsamis, Editor(s)

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