Multiple-coil magnetic field sensor with series-connected main coils and parallel-connected feedback coils
US5130655A · kind A · utility
16Cited by
4References
4Claims
0Family size
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Inventor
Key dates
| Filing date | Mar 20, 1991 |
| Grant date | Jul 14, 1992 |
| Priority date | — |
| Expiry date | Mar 20, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A borehole magnetic sensor includes a plurality of primary detector coils, aligned along parallel axes, and connected in series with each other. A corresponding plurality of feedback coils, each associated with a respective detector coil, are arranged to cooperate with an amplifier system to provide negative feedback and null the magnetic field through the detector coils. The feedback coils are connected in parallel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.