SENSING SENSOR

PROBLEM TO BE SOLVED: To provide a sensor for detecting position, displacement, shift, distance, thickness, side-runout, irregularities in an oscillation surface, rotation speed, speed and the like of an object comprising a non-magnetic conductor at high sensitivity, by signal-processing an output voltage singular value generated in an MI element in an exciting coil. SOLUTION: In the sensing sensor of the non-magnetic conductor object, when the non-magnetic conductor object is separated at a distance having no magnetically specific interaction with the exciting coil and when the non-magnetic conductor object is near to the exciting coil, the high sensitivity sensor matched with respective purposes can be provided, by fixing the exciting coil and an MI sensor at the maximum and minimum values appearing in the exciting coil and the output value of the MI sensor of an peripheral edge outside of the exciting coil, and in the neighborhood of an arbitrary position of a transition curve of the maximum value to the minimum value in matching with the purpose, respectively. COPYRIGHT: (C)2006,JPO&NCIPI