Magnetic field measuring apparatus and apparatus for measuring spatial resolution of magnetic field detector

An apparatus for measuring the spatial resolution of a magnetic field detector, comprising:

• a magnetic field detector for detecting a magnetic field generated by a current flowing in a wire;
• a measuring unit for measuring a magnetic field intensity based on an output signal from said magnetic field detector;
• a magnetic field intensity distribution generator for generating a magnetic field intensity distribution parallel to a plane of the wire in a direction perpendicular to the wire;
• a minimum magnetic field intensity detector for outputting a position of said magnetic field detector where the magnetic field intensity is minimum;
• a spatial resolution characteristic generator for generating a characteristic at different heights from the plane of the wire as a spatial resolution characteristic of said magnetic field detector with respect to the height thereof;
• a three-dimensional scanning device for scanning said magnetic field detector along an axis of said wire, an axis of a straight line perpendicular to said wire, and an axis of the height from said plane of the wire;
• and
• a position detector for detecting a position of said magnetic field detector.

A magnetic field measuring apparatus comprising:

• a magnetic field detector for detecting a magnetic field generated by a current flowing in one of a plurality of parallel wires;
• a measuring unit for measuring a magnetic field intensity based on an output signal from said magnetic field detector;
• an input unit for entering a pitch of the parallel wires and a spatial resolution characteristic of said magnetic field detector;
• a processor for calculating a height of said magnetic field detector from said one of the parallel wires based on said pitch of the parallel wires and said spatial resolution characteristic;
• a scanning device for three-dimensionally scanning said magnetic field detector into a position determined by said processor along an axis of said wires, an axis of a straight line perpendicular to said wires, and an axis of the height from said plane of the wires;
• a magnetic field intensity distribution generator for generating a magnetic field intensity distribution parallel to a plane of the wires in a direction perpendicular to the wires;
• a minimum magnetic field intensity detector for outputting a position of said magnetic field detector where the magnetic field intensity is minimum;
• a spatial resolution characteristic generator for generating a characteristic at different heights from the plane of the wires as a spatial resolution characteristic of said magnetic field detector with respect to the height thereof, and outputting the generated characteristic to said input unit;
• and
• a position detector for detecting a position of said magnetic field detector.