Abstract
A new type of a remote two-dimensional magnetic field and current sensor has been developed to measure constant (DC) and variable (AC) magnetic fields and currents simultaneously in two perpendicular directions with a linearity error less than 0.1%. Based on the elastic cantilever principle, the deflection of an aluminium-coated optical fibre due to the Lorentzian force is sensed by an optical lever and a continuous position optical sensor. The sensor shows an extremely wide measurement range, 60 dB dynamic range, -45 dB cross talk and a resolution of (for the magnetic flux density) and 0.3 A (for the current). Due to the separation in space of the registration and the sensing parts, the sensor can be designed to have any desired response or sensitivity and has no upper limits. It is designed mostly to measure strong and extremely strong magnetic flux densities and currents.
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