Laser interferometric read-out accelerometer for seismic noise measurement

Fausto Acernese; Fabrizio Barone; Rosario De Rosa; Leopoldo Milano; Ketevan Qipiani

doi:10.1117/12.511146

13 February 2004 Laser interferometric read-out accelerometer for seismic noise measurement

Fausto Acernese, Fabrizio Barone, Rosario De Rosa, Leopoldo Milano, Ketevan Qipiani

Proceedings Volume 5239, Remote Sensing for Environmental Monitoring, GIS Applications, and Geology III; (2004) https://doi.org/10.1117/12.511146
Event: Remote Sensing, 2003, Barcelona, Spain

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.

Citation Download Citation

Fausto Acernese, Fabrizio Barone, Rosario De Rosa, Leopoldo Milano, and Ketevan Qipiani "Laser interferometric read-out accelerometer for seismic noise measurement", Proc. SPIE 5239, Remote Sensing for Environmental Monitoring, GIS Applications, and Geology III, (13 February 2004); https://doi.org/10.1117/12.511146

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