Vector magnetometer for measurement of vector magnetic fields has a design that enables very precise measurements of weak magnetic fields, e.g. of the order of magnitude of the Earth's magnetic field

摘要

Vector magnetometer measures the components of a magnetic field along three directions by use of a scalar magnetometer (2). The field is periodically modulated by generators (Gx, Gy, Gz) with a particular frequency in each direction. The vector magnetometer has means (Dx, D'x, Dy, D'y, Dz, D'z) for execution of double and quadruple phase demodulations for each of the frequencies. A transfer function is thus calculated for the scalar magnetometer which is then applied to it to correct the field components. The invention also relates to a corresponding measurement method.