Power transmission apparatus, power reception apparatus, method for controlling wireless power transmission system, and storage medium

Abstract

A wireless power transmission system wirelessly transmits power from a power transmission apparatus to a power reception apparatus. The system performs detection processing using a first detection method for detecting an object different from the power reception apparatus. The system determines whether a predetermined condition related to a state of at least either one of the power transmission apparatus and the power reception apparatus is satisfied. Then, the system performs object detection processing using a second detection method, different from the first detection method, according to a result of the determination regarding whether the predetermined condition is satisfied.

What is claimed is: 
     
         1 . A power transmission apparatus comprising:
 a power transmission unit configured to wirelessly transmit power to a power reception apparatus;   a measurement unit configured to measure a Q value;   a first acquisition unit configured to acquire first information related to a physical quantity different from the Q value and second information different from the first information and related to a physical quantity different from the Q value   a detection unit configured to perform a detection process for detecting a foreign substance on a basis of the Q value measured by the measurement unit; and   an execution unit configured to execute a specific process in a case where, under a state in which the detection unit has performed the detection process and the power transmission unit has not yet wirelessly transmitted the power to the power reception apparatus, information obtained on a basis of the first information, the second information, third information, and fourth information, the third information and the fourth information each being related to a physical quantity and being owned by the power transmission apparatus, satisfies a predetermined condition.   
     
     
         2 . The power transmission apparatus according to  claim 1  wherein the specific process is a foreign substance detection process based on a waveform attenuation.