Energy receiver, the energy transmitter, the detection apparatus and detection method

The present invention discloses an energy receiver, the energy transmitter, the detection apparatus and detection method. The wireless power transmission method comprising the respective first and second voltages acquired by the resonance circuit Q value of the circuit of the first node and the second node. The first and second voltages for determining whether a wireless power transmission to extraneous space. The method comprises controlling the switching unit between the Q value and tuning circuit, so that the power transmission process occurs when at least a portion of the first and second voltages acquired at different times.