4. Relative measures
At present, two main measurement principles are used for relative gravimeters.
The first, used in virtually all relative field gravimeters, is based on measuring variations in the elongation of a spring or spring system.
Consider a vertical spring, with a mass suspended at the end. In equilibrium, the tension compensates for the weight and we have :
with :
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Relative measures
Bibliography
References
Theses
Standardization
Association française de normalisation AFNOR http://www.afnor.fr
- Valeur de la pesanteur terrestre - NF X02-011 - 11-1974
Organizations
Bureau gravimétrique international (BGI) http://www.bgi.cnes.fr:8110
Bureau de recherches géologiques et minières (BRGM) http://infoterre.brgm.fr
Manufacturers
Scintrex http://www.scintrexltd.com
Lacoste & Romberg http://www.lacosteromberg.com
Micro-G Solutions http://www.microgsolutions.com
...
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