Digitization of optical lever instruments

G. Romeo

Abstract


Some classical old-fashioned instruments (such as the Wood-Anderson seismometers), as well as some modern instruments (like the all-quartz made Verbaandert-Melchior tiltmeters), conventionally require an impractical recording system obtained by a photographic drum recorder in a darkroom. Simple electronic equipment (made by readily available, low cost electronics) may help in using such kind of instruments allowing a useful digital recording. This will reduce the time-hour in data acquisition and storage (and the manual error), and will increase the accuracy. The theory of operations and some results obtained using the described equipment are shown.

Keywords


optical level;digitalization;DSP;CCD linear sensor;Wood-Anderson;grotta gigante pendulums

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References


DOI: https://doi.org/10.4401/ag-3657
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Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X