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Low magnetic field detection/measurement

Reference

02585-01

Patents status

French patent application FR0951918, filed on March, 25th, 2009

Inventors

Claude CAVOIT

commercial status

Exclusive or non-exclusive licenses

Laboratory

Laboratoire de Physique et Chimie de l’Environnement et de l’Espace (LPC2E) UMR 6115, France, http://lpce.cnrs-orleans.fr/

Description

CONTEXT

The measurement of low magnetic fields is very useful for the geophysics’ and metallurgical fields. Some techniques, such as the fluxgate or the GRM (Giant MagnetoResistance) already exist but they are still quite bulky or not very efficient. So, we decided to improve the performances of GMRs.

TECHNICAL DESCRIPTION

Our technique consists in a closed magnetic circuit in two parts. Each part is separate by two magnetoresistances and polarized.

BENEFITS

  • Improvement of GMRs:
    Lower bulk
    Better resistance to background noise,
    Better sensibility for the whole frequency range,
    Lower temperature dependence,
    Better performances alternative or direct magnetic fields,
    Better offset,
    Sensibility independent of magnetic polarization

INDUSTRIAL APPLICATIONS

Detection of a low magnetic field for:
Planets,
Geophysics’ drilling,
Geophysics’ prospection,
Non-destructive checking of metallic structures.

DEVELOPMENT STAGE

  • Demonstrators available
    On-going improvement

For further information, please contact us (Ref 02585-01)

 


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