Classification of existing energy transfer technologies
(1) Radiation technology: receives the radiation energy that has not yet been lost in the air through a unique receiver, and converts it into electrical energy and stores it in a nearby battery; Magnetic field resonance technology: when two objects achieve resonance at the same frequency, wireless transmission of energy will be achieved; Inductive coupling technology: energy transmission through relatively direct contact, especially if the machine is placed on a mat to charge; \"Harvest\" energy from the environment: convert thermal energy, light energy and vibration energy that occur in nature into the required energy