Device and method for creating one or more magnetic field gradients through a straight conductor
US6636029B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2001 |
| Grant date | Oct 21, 2003 |
| Priority date | — |
| Expiry date | Apr 19, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Magnetic field gradients are used e.g., for potential-free current measurement without voluminous ferrite cores to minimize the influence of homogenous external interference fields on the measurement. So far, they have been provided mainly through U-shaped primary current conductors. The aim is to make it unnecessary to guide high currents through U-shaped current conductors, and to provide a device and a method for creating one or more magnetic field gradients through a straight conductor. To this end, a primary current conductor which is straight at the point where the magnetic field is measured has a recess or groove or slot for creating a magnetic field gradient. Inside or in the area surrounding this recess, the field lines take a course that enables one or more gradiometers to be positioned so that the influences of especially homogenous interference fields on the measurements are successfully minimized using simple mathematical methods such as subtraction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.