Method for magnetic field tracking in a NMR check weighing system
US7061239B2 · kind B2 · utility
2Cited by
22References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2004 |
| Grant date | Jun 13, 2006 |
| Priority date | — |
| Expiry date | Apr 30, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N24/085
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method (10) insures that the characteristics of the magnetic field used in a magnetic resonance check weighing system (20) for samples in vials (22) on a production line track deviations from the resonant frequency of the sample. The method (10) includes the steps of obtaining (50) a free induction decay signal from a magnetic resonance measurement of the sample, monitoring (52) from the free induction decay signal the deviation of the resonance frequency of the magnetic resonance measurement from a preselected resonance frequency; and adjusting (62) the magnetic field to maintain the preselected resonance frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.