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Brevet Année : 2013

Micromagnetometry detection system and method for detecting magnetic signatures of magnetic materials

Ferial Terki
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Quang-Hung Tran
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Sinha Brajalal
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Kim Cheolgi
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Kamara Souleymane
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Salam Charar
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Résumé

A micromagnetometry system for detecting the presence of very small quantities of magnetic particles comprises a first magnetic hybrid AMR/PHR multi-ring sensor (4) using a Wheastone bridge electrical configuration, a first current source (6), a first voltage measurement device (8), a set of at least one magnetic particles (12) deposited on the first magnetic sensor (4) and a processing unit (22) for detecting from a set of different measured differential voltages a magnetic flux shift representative of the presence of a least one deposited magnetic particle (12). The micromagnetometry system comprises means (20) for creating a magnetic excitation field HAC to make produce by each motionless magnetic particle (12) a stray magnetic field oscillating along the time at a constant frequency ranging from 10 Hz to 3 KHz.
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Dates et versions

hal-00829630 , version 1 (03-06-2013)

Identifiants

  • HAL Id : hal-00829630 , version 1

Citer

Ferial Terki, Quang-Hung Tran, Sinha Brajalal, Kim Cheolgi, Azzedine Bousseksou, et al.. Micromagnetometry detection system and method for detecting magnetic signatures of magnetic materials. France, Patent n° : 12305852.1-2216. L2C:12-399. 2013. ⟨hal-00829630⟩
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