Magnetic field direction detector

摘要

A magnetic field direction detector for detecting whether a magnetic flux has a component of field from a first side or a second side of a detection axis; the magnetic field direction detector comprising: a first magneto-resistive sensor; and a perturbation generator; wherein the perturbation generator causes an external magnetic field to be perturbed so as to cause the apparent direction of flux to change by an angle θ1 at the first magneto-resistive sensor.

主权项

1. A magnetic field direction detector comprising:
a first magneto-resistive sensor; a second magneto-resistive sensor; and a perturbation generator; wherein the perturbation generator causes an external magnetic field to be perturbed so as to cause the apparent direction of flux to change by an angle θ1 at the first magneto-resistive sensor, wherein the perturbation generator causes the apparent direction of flux to change by an angle θ2 at the second magneto-resistive sensor such that the relative resistances of the first and second magneto-resistive sensors vary with respect to one another, wherein the magnetic field direction detection is based at least in part on the changes of apparent direction of flux and the relative resistances at the first and second magneto-resistive sensors, wherein the magnetic field direction detector is configured to detect whether a magnetic flux has a component of field from a first side or a second side of a detection axis.