River acoustic tomography flow monitoring system and method based on double-frequency underwater acoustic base station

The invention discloses a river acoustic tomography flow monitoring system and method based on double-frequency acoustic base stations. The method comprises the following steps: (1) controlling more than two double-frequency RATS acoustic base stations to generate acoustic signals on two sides of a river through an RATS monitoring control platform; (2) analyzing the main control signal to obtain double-frequency sound signal data of the same sound base station; (3) emitting a low-frequency acoustic signal, and starting to receive an underwater acoustic signal after specific delay according to parameters configured by the RATS monitoring control platform; (4) performing matched filtering processing on the data in the specific time period to find an effective time interval of the underwater acoustic signal; low-frequency sound wave positioning and high-frequency sound wave data acquisition and analysis are combined; and (5) carrying out quality control on all sound wave signal data sent back by the sound base s