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Proceedings Paper

Laser interferometric read-out accelerometer for seismic noise measurement
Author(s): Fausto Acernese; Fabrizio Barone; Rosario De Rosa; Leopoldo Milano; Ketevan Qipiani
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Paper Abstract

Laser interferometry is one of the most sensitive methods to measure small displacement. This technique was successfully used in several fields of physics, giving very good performances also due to the large availability of optical components and laser source of high quality and relatively low cost. At the same time this technique is enough flexible to be effectively used in very different applications. In particular, in this work, we present a laser interferometric system used to read the position of the sensible element of a standard seismic accelerometer. Seismic accelerometers working mechanism is based on a control system that acts on the sensible element to stabilize its position; by looking at the force needed to perform this feedback it is possible to deduce the acceleration. Usually the feedback system of these instruments is based on magnet and coil, or on piezoelectric actuators, while the signal transducer are usually capacitive device. The performances of the interferometric system were analyzed in comparison with standard one. The result are encouraging also if some problem, mainly connected with the dynamic of the read-out system should be better studied.

Paper Details

Date Published: 13 February 2004
PDF: 8 pages
Proc. SPIE 5239, Remote Sensing for Environmental Monitoring, GIS Applications, and Geology III, (13 February 2004); doi: 10.1117/12.511146
Show Author Affiliations
Fausto Acernese, Univ. degli Studi di Napoli Federico II (Italy)
INFN, Complesso Univ. di Monte Sant' Angelo (Italy)
Fabrizio Barone, INFN, Complesso Univ. di Monte Sant' Angelo (Italy)
Univ. degli Studi di Salerno (Italy)
Rosario De Rosa, Univ. degli Studi di Napoli Federico II (Italy)
INFN, Complesso Univ. di Monte Sant' Angelo (Italy)
Leopoldo Milano, Univ. degli Studi di Napoli Federico II (Italy)
INFN, Complesso Univ. di Monte Sant' Angelo (Italy)
Ketevan Qipiani, INFN, Complesso Univ. di Monte Sant' Angelo (Italy)


Published in SPIE Proceedings Vol. 5239:
Remote Sensing for Environmental Monitoring, GIS Applications, and Geology III
Manfred Ehlers; Hermann J. Kaufmann; Ulrich Michel, Editor(s)

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