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US 2008/0173090 A1Published application
Gravity Gradiometer
AssigneeTechnological Resources Pty. Limited
InventorsFrank Joachim Van Kann, John Winterflood
Life of this patent
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Abstract
A gravity gradiometer is described which comprises a pair of sensor bars 41, 43 arranged in housings 45, 47. Transducers 71 are arranged adjacent the bars 41, 43 for measuring movement of the bars in response to the gravity gradient tensor. At least one of the transducers has a sensing coil 510 and a capacitor plate 518a having a concentric arrangement with the sensing coil 510 for providing one plate of a capacitor used in a balancing circuit for measuring the balance of the sensor mass.
Claims10
A gravity gradiometer for measuring components of the gravity gradient tensor, comprising:
- at least one sensor mass for movement in response to the gravity gradient;
- a transducer for measuring the movement of the sensor mass, the transducer having a sensing coil mounted on a mount element and located adjacent the mass;
- and
- a capacitor plate having a concentric arrangement with the sensing coil for providing one plate of a capacitor used in a balancing circuit for measuring the balance of the sensor mass, so that the capacitor plate and the sensing coil are subjected to substantially the same gap spacing from the mass to the sensing coil and the capacitor plate during balancing of the capacitor plate and measurement of the at least one component of the gravity gradient tensor.
1 more element
Dependencies are inferred from the claim text.