Self-calibration of flux gate offset and gain drift to improve measurement accuracy of magnetic fields from the brain using a wearable neural detection system
US11872042B2 · kind B2 · utility
0Cited by
82References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 27, 2021 |
| Grant date | Jan 16, 2024 |
| Priority date | — |
| Expiry date | Apr 10, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/032
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A calibration system for a magnetometer having an unknown gain is disclosed. A calibration magnetic field is generated at a calibration frequency of a known amplitude at the magnetometer. A measurement of the calibrating magnetic field is reported by the magnetometer. A ratio of an amplitude of the calibration magnetic field measurement reported by the magnetometer and the known amplitude of the calibrating magnetic field at the magnetometer is computed. The unknown gain of the magnetometer is determined at least partially based on computed ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.