AUV (Autonomous Underwater Vehicle) return-dock navigation system and method based on electromagnetic wave attenuation principle

The invention discloses an AUV (Autonomous Underwater Vehicle) return-dock navigation system based on an electromagnetic wave attenuation principle. The AUB return-dock navigation system comprises anelectromagnetic wave receiving module, an electromagnetic signal analysis module, an industrial personal computer and an underwater wireless sensor network, wherein the electromagnetic wave receivingmodule is carried on AUV and is used for receiving an electromagnetic wave signal emitted by a wireless radio frequency sensor and transmitting the electromagnetic wave signal to the electromagnetic signal analysis module; the electromagnetic signal analysis module is carried on the AUV and is used for enabling the electromagnetic wave signal to be converted from an analog signal into a digital signal and transmitting the digital signal to the industrial personal computer; the industrial personal computer is used for calculating intensity of the electromagnetic wave signal according to an electromagnetic wave digital s