Apparatus for the measurement of gravitational gradients
US6871542B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 2002 |
| Grant date | Mar 29, 2005 |
| Priority date | — |
| Expiry date | Sep 27, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V7/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for the measurement of quasi-static gravity gradients comprising a flexible string and output means for producing an output which is a function of the gravity gradients, wherein the string is fixed at both ends, and wherein the apparatus comprises sensing means for detecting the transverse displacements of the string from its undisturbed reference position due to a gravity gradient around the string. The output means is responsive to the detected displacement to produce an output which is a function of the gravity gradient. The apparatus further comprises a means mounted at a position corresponding to the mid-point between the fixed ends of the string and constructed to prevent movements of the string which correspond to its odd modes (starting from C-mode) whilst not affecting at least the movement of the string which corresponds to its second fundamental mode (S-mode).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.