Digitization of optical lever instruments

• Main Author: G. Romeo
• Format: Article
• Language: English
• Published: Istituto Nazionale di Geofisica e Vulcanologia (INGV) 2000-06-01
• Series: Annals of Geophysics
• Subjects: optical level; digitalization; DSP; CCD linear sensor; Wood-Anderson; grotta gigante pendulums
• Online Access: http://www.annalsofgeophysics.eu/index.php/annals/article/view/3657

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.