| 摘要 |
PROBLEM TO BE SOLVED: To supply a multi-axis flux-gate magnetic sensor correct sensing irrespective of a fluctuation in temperature.SOLUTION: The multi-axis flux-gate magnetic sensor is equipped with: an annular first magnetic core; a first excitation coil wound around the first magnetic core; two detection coils wound around the first magnetic core in such a manner that respective input axes of the detection coils are orthogonal to each other; two signal detection/feedback units that detect outputs of the detection coils and feed output signals back to the detection coils; and a first excitation unit for supplying excitation current to the first excitation coil. It is also equipped with: a second magnetic core; a compensation coil wound around the second magnetic core; and a compensation signal generation unit for generating, from an output of the detection coil, compensation current to be applied to the compensation coil. The second magnetic core and the compensation coil are disposed in positions and directions so that a compensation magnetic field created by the compensation coil can cancel interference between the two detection coils wound around the first magnetic core. |
