The fish finder is an intelligent fishing-aid device. The vertical installation of the transducer will effectively detect the dynamics of the fish in the lower waters. A new fish finder is designed based on AA32416 logarithmic amplifier is proposed. Firstly

the main control module

transmitting module

receiving module and echo signal processing module are used for detection. Data processing and analysis are realized through software program. Field experiments show that the designed fish finder can achieve the expected indicators

it has certain practical value and scientific research significance.