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A multi-core orthogonal fluxgate sensor is presented, in which the sensing element is formed by multiple insulated thin-wires of a soft ferromagnetic material. Experiments were conducted to investigate the characteristics of the sensor. The results showed that the sensor sensitivity increased exponentially with increasing the number of cores in the sensing element. Such an increase was neither due...
Orthogonal fluxgate sensor was built using copper wire covered by electroplated permalloy. This type of sensor core has significant advantage over the sensors based on amorphous wires: it has no magnetic material in the central part, where the excitation field is low. 11 muV/nT sensitivity and less than 1 muT perming error were achieved for the first sensor prototype. The used core geometry also allows...
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