Seismic sensors
US7292504B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 9, 2003 |
| Grant date | Nov 6, 2007 |
| Priority date | — |
| Expiry date | Mar 20, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/181
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for compensating the effect of gravity on seismic sensors such as geophones and a gravity effect-free seismic sensor are disclosed. The gravity effect-free seismic sensor of the present invention includes primary sensor (100) operatively responsive to seismic movements and hence generating a seismic signal by having a coil placed in a magnetic field in a first axis of sensitivity (105); an auxiliary sensor (210) operatively responsive to a gravity field for generating a tilt signal, thus provide current to the coil of the primary sensor (100) to induce a force on the coil that at least partially compensates for a weight of the coil, thus ameliorating or eliminating a gravity effect on the primary sensor (100).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.