Patent ID: 10012705

Abstract:
Magnetic-field measuring device having: elongate magnetic-material formed of solid or liquid having magnetic-anisotropy, or composite of solid and liquid; an electrically conductive-body adjacent to magnetic-material, giving magnetic-material a current-induced magnetic-field-vector having a component perpendicular to longitudinal-directions of magnetic-material; coil detecting magnetic-field by magnetic-material, which is magnetized in a direction perpendicular to its longitudinal-direction when no external magnetic-field is applied to magnetic-material or when only a magnetic-field not having a component in longitudinal-direction applied to magnetic-material, and magnetizing in direction having the component in longitudinal-direction when external magnetic-field have the component in longitudinal-direction of magnetic-material applied to magnetic-material, a direction of magnetization of magnetic-material aligned with direction perpendicular to longitudinal-direction of magnetic-material when magnetic-material sufficiently receives current-induced magnetic-field-vector, magnetic-field measuring device intermittently applies current to the conductive-body, detecting an electromotive-force generated by the coil while current is applied to the conductive-body and no current is applied to the conductive-body.