POWER SUPPLY DEVICE, POWER RECEIVING DEVICE, CHARGING SYSTEM, AND OBSTACLE DETECTION METHOD

摘要

Provided are a power supply device, a power receiving device, a charging system, and an obstacle detection method that obtain a sufficient obstacle detection sensitivity even when an obstacle is small. A modulation unit (202) performs amplitude modulation or phase modulation on a test data sequence output from a test data sequence storage unit (201). A power control unit (203) generates, according to an instruction from a determination unit (204), a power control signal for increasing the power level of the test data sequence every time when the test data sequence is transmitted. The determination unit (204) determines whether there is an obstacle between the power receiving device and the power supply device based on whether the test data sequence output from the test data sequence storage unit (201) coincides with the test data sequence output from a power-transmitting-side receiving circuit (124).

主权项

1. An electric supply apparatus that supplies electric power in a contactless manner to an electric reception apparatus provided in a vehicle, using electromagnetic induction, the electric supply apparatus comprising:
a transmitting section that transmits a first test data string having a predetermined data sequence to the electric reception apparatus using the electromagnetic induction in a coil; a control section that controls the transmitting section to transmit the first test data string from the transmitting section; a receiving section that receives a data string transmitted from the electric reception apparatus as a second test data string obtained by the electric reception apparatus via demodulation of the first test data string received by the electric reception apparatus; and a determination section that determines whether there is an obstacle between the electric reception apparatus and the electric supply apparatus based on whether the first test data string transmitted by the transmitting section coincides with the second test data string received by the receiving section.