MICROMAGNETOMETRY DETECTION SYSTEM AND METHOD FOR DETECTING MAGNETIC SIGNATURES OF MAGNETIC MATERIALS.
摘要
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 H AC to make produce by each motionless magnetic particle (12) a stray magnetic field oscillating along the time at a constant frequency É ranging from 10 Hz to 3 KHz.
申请公布号
EP2872911(B1)
申请公布日期
2016.05.25
申请号
EP20130736576
申请日期
2013.07.12
申请人
UNIVERSITÉ DE MONTPELLIER;CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS)
发明人
TERKI, FÉRIAL;BOUSSEKSOU, AZZEDINE;TRAN, QUANG HUNG;KAMARA, SOULEYMANE;KIM, CHEOLGI;KIM, KUN WOO;GANDIT, PHILIPPE