Magnetic field sensor device

G - Physics – 01 – R

Patent

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G01R 33/02 (2006.01)

Patent

CA 2734623

Provided is a magnetic field sensor device (1) having a sensor section (100) which includes a magnet-ic impedance element (110) having a magnetic noncrys-talline structural body. The electromagnetic sensor device has, in the longitudinal direction of the magnetic noncrys-talline structural body, bar-like core sections (130, 131) which lead a magnetic field to the magnetic noncrystalline structural body. The core sections (130, 131) may be ar-ranged on the both sides on the magnetic noncrystalline structural body in the longitudinal direction. The core sec-tions (130, 131) may be arranged so that the longitudinal direction of the magnetic noncrystalline structural body and the longitudinal direction of the core sections (130, 131) are on the same straight line. The magnetic field sen-sor device may include environmental magnetic field offsetting means (140, 141) which generate a correction mag-netic field that offsets an environmental magnetic field inputted to the magnetic noncrystalline structural body.

La présente invention concerne un dispositif capteur de champ magnétique (1) comportant une section de capteur (100) comprenant un élément à magnéto-impédance (110) ayant un corps magnétique structurel non cristallin. Le dispositif capteur électromagnétique présente, dans la direction longitudinale du corps magnétique structurel non cristallin, des sections de noyau en forme de barres (130, 131) qui conduisent un champ magnétique vers le corps magnétique structurel non cristallin. Les sections de noyau (130, 131) peuvent être disposées sur les deux côtés du corps magnétique structurel non cristallin. dans la direction longitudinale. Les sections de noyau (130, 131) peuvent être disposées de sorte que la direction longitudinale du corps magnétique structurel non cristallin. et la direction longitudinale des sections de noyau (130, 131) soient sur la même ligne droite. Le dispositif capteur de champ magnétique peut comporter des moyens de décalage de champ magnétique environnemental (140, 141) qui génèrent un champ magnétique de correction qui décale un champ magnétique environnemental entré dans le corps magnétique structurel non cristallin.

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