Wireless power supply system
A wireless power supply system includes a first underwater vehicle that has a power-receiving coil for wirelessly receiving electric power and a second underwater vehicle that has a power-supplying coil for wirelessly supplying electric power and transmits electric power between the power-receiving coil and the power-supplying coil while moving in parallel to the first underwater vehicle.
1. A wireless power supply system comprising:
a first underwater vehicle that has a power-receiver for wirelessly receiving electric power; and
a second underwater vehicle that has a power-transmitter for wirelessly supplying electric power and transmits electric power between the power-receiver and the power-transmitter while moving in parallel to the first underwater vehicle,
wherein the second underwater vehicle is driven with a storage battery, and
wherein the wireless power supply system further comprising:
a power-supplying station that supplies electric power to the storage battery; and
a controller for making the second underwater vehicle return to the power-supplying station based on a state of charge of the storage battery.
2. The wireless power supply system according to claim 1 , wherein the controller stops the wireless supply of electric power and makes the second underwater vehicle return to the power-supplying station when the state of charge of the storage battery is equal to or less than a threshold value.
3. The wireless power supply system according to claim 2 , wherein the controller repetitively updates the threshold value based on a distance of the second underwater vehicle from the power-supplying station.
4. The wireless power supply system according to claim 3 , wherein the power-transmitter supplies electric power stored in the storage battery.
5. The wireless power supply system according to claim 2 , wherein the power-transmitter supplies electric power stored in the storage battery.
6. The wireless power supply system according to claim 1 , further comprising a positioner for positioning the power-receiver and the power-transmitter when performing the wireless supply of electric power.
7. The wireless power supply system according to claim 6 , wherein the positioner includes a suction device for attaching the first underwater vehicle and the second underwater vehicle by suction.
8. The wireless power supply system according to claim 6 , wherein the positioner includes a magnetic attachment for magnetically attaching the first underwater vehicle and the second underwater vehicle.
9. The wireless power supply system according to claim 6 , wherein the positioner includes:
a marker that is installed in the first underwater vehicle; and
a marker detector installed in the second underwater vehicle so as to detect the marker.