Power efficiency measuring apparatus

A measuring apparatus comprising:

• a mover that moves at least one of a supplier electrode and a receiver electrode of a noncontact power supply to measurement positions that have been decided in advance;
• a meter that measures a measurement for the noncontact power supply at each measurement position;
• and
• a processor that calculates a power supplying efficiency of the noncontact power supply at each measurement position based on measured values of the measurement,
• wherein when the processor specifies, on a plane where the at least one of the supplier electrode and the receiver electrode moves, a region area of a region where the power supplying efficiency is in a designated range that has been designated in advance, and generates area information indicating the region area, the processor:
• treats the plane as a first plane orthogonal coordinate system,
• designates one coordinate value out of two position coordinates in the first plane orthogonal coordinate system as a designated coordinate value,
• defines a second plane orthogonal coordinate system that has another coordinate value out of the two position coordinates as a first coordinate and has the power supplying efficiency as a second coordinate,
• plots, in the second plane orthogonal coordinate system, coordinate points that are each defined by a coordinate value of the other position coordinate of a measurement position where the one coordinate value out of the two position coordinates is the designated coordinate value and the power supplying efficiency of the measurement position,
• specifies a curve indicating a relationship between the other position coordinate and the power supplying efficiency based on the coordinate points,
• executes, while changing the designated coordinate value, a specifying process that specifies an extending length, along an axis of the first coordinates, of the curve that belongs inside the designated range, and
• specifies the region area based on the extending lengths specified by the specifying process.