Measuring instrument, wireless power transfer apparatus, and wireless power transfer system

A wireless power transfer apparatus for transferring power wirelessly, comprising:

• a signal receiving part that receives a beacon signal including information indicating a posture of the measuring instrument from the measuring instrument having a plurality of power receiving antennas;
• a measuring instrument identifying part that identifies i) a position of a signal transmission part in the measuring instrument transmitting the beacon signal relative to the wireless power transfer apparatus and ii) a posture of the measuring instrument, on the basis of the beacon signal received by the signal receiving part;
• a power receiving position identifying part that identifies respective positions of the plurality of power receiving antennas on the basis of i) positional relationship data indicating a positional relationship between the signal transmission part and each of the plurality of power receiving antennas in the measuring instrument, ii) a position of the signal transmission part identified by the measuring instrument identifying part, and iii) a posture of the measuring instrument;
• a power transmission target identifying part that identifies, as a power transmission target, the power receiving antenna capable of receiving the largest amount of power transmitted by the power transmission antenna from among the plurality of power receiving antennas, on the basis of the identified respective positions of the plurality of power receiving antennas;
• and
• a power transmission controller that causes the power transmission antenna to transmit power to the identified power receiving antenna.

A wireless power transfer system comprising:

• a wireless power transfer apparatus that transfers power wirelessly;
• and
• a measuring instrument that receives power transferred from the wireless power transfer apparatus, wherein
• the measuring instrument includes:
• a plurality of power receiving antennas that receives power transmitted from the wireless power transfer apparatus,
• a posture detection part that detects a posture of the measuring instrument, and
• a signal transmission part that transmits a beacon signal including information indicating a posture detected by the posture detection part, wherein
• the wireless power transfer apparatus includes:
• a power transmission antenna that transmits power from the wireless power transfer apparatus,
• a signal receiving part that receives the beacon signal,
• a measuring instrument identifying part that identifies a position of the signal transmission part relative to the wireless power transfer apparatus and a posture of the measuring instrument, on the basis of the beacon signal received by the signal receiving part,
• a power receiving position identifying part that identifies respective positions of the plurality of power receiving antennas on the basis of i) positional relationship data indicating a positional relationship between the signal transmission part and each of the plurality of power receiving antennas in the measuring instrument, ii) a position of the signal transmission part identified by the measuring instrument identifying part, and iii) a posture of the measuring instrument,
• a power transmission target identifying part that identifies, as a power transmission target, the power receiving antenna capable of receiving the largest amount of power transmitted by the power transmission antenna from among the plurality of power receiving antennas, on the basis of the identified respective positions of the plurality of power receiving antennas, and
• a power transmission controller that causes the power transmission antenna to transmit power to the identified power receiving antenna.