High-resolution digital seismic and gravity sensor and method

Details High-resolution digital seismic and gravity sensor and method High-resolution digital seismic and gravity sensor and method

G - Physics

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G01V 1/18 (2006.01) G01L 1/10 (2006.01) G01V 7/02 (2006.01) H01L 41/08 (2006.01)

Patent

CA 2734242

A high-resolution digital seismic and gravity sensor includes an inertial mass connected to one or more force-sensitive resonators. The weight of the inertial mass is substantially unloaded with a spring arrangement when exposed to the force of the static gravity field. Seismic accelerations applied to the base of the seismic and gravity sensor, or changes in the gravitational field, generate loads that are transmitted to force-sensitive resonators so that changes in resonant frequency are related to the applied load. The changes in resonant frequency are thus a measure of the seismic accelerations and gravitational field variations.

La présente invention a pour objet un capteur sismique et de gravité numérique haute résolution comprenant une masse inertielle reliée à un ou plusieurs résonateurs sensibles aux forces. Le poids de la masse inertielle est essentiellement déchargé avec un agencement de ressorts lorsquelle est exposée à la force du champ de gravité statique. Les accélérations sismiques appliquées à la base du capteur sismique et de gravité, ou les modifications du champ gravitationnel, engendrent des charges qui sont transmises aux résonateurs sensibles aux forces de sorte que les modifications de la fréquence de résonance sont relatives à la charge appliquée. Les modifications de la fréquence de résonance sont ainsi une mesure des accélérations sismiques et des variations du champ gravitationnel.

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