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A Simple TiltmeterBubble vial with external aluminum-foil electrodes is sensing element for simple indicating tiltmeter. To measure bubble displacement, bridge circuit detects difference in capacitance between two sensing electrodes and reference electrode. Tiltmeter was developed for experiment on forecasting seismic events by changes in Earth's magnetic field.
Document ID
19810000325
Document Type
Other - NASA Tech Brief
Authors
Dix, M. G.
Harrison, D. R.
Edwards, T. M.
Date Acquired
August 11, 2013
Publication Date
December 1, 1982
Publication Information
Publication: NASA Tech Briefs
Volume: 6
Issue: 3
ISSN: 0145-319X
Subject Category
MACHINERY
Report/Patent Number
ARC-11344
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.