The thesis presents the design and implementation of a system for acquiring and analyzing sonar signals from the Lowrance Eagle sonar. The introductory part describes the basic principles of sonar systems, their classification, and the physical phenomena of sound propagation in water, using appropriate models of acoustic wave propagation.
The following section presents the design of an interface for acquiring sonar signals, implemented in KiCad. The developed interface allows connection of the sonar to measurement equipment while filtering and amplifying the signal, ensuring correct acquisition and improved data quality. Practical signal acquisition was performed using an oscilloscope, and the collected data were analyzed in Mathcad Professional. The analysis included depth determination and monitoring changes in sonar reflection amplitudes with depth.
The results of the acquired signals were compared with the values provided by the sonar, allowing for an assessment of measurement accuracy. The work thus demonstrates the entire process, from the theoretical study of sonar systems, through the design and implementation of the interface, to the acquisition, processing, and analysis of sonar signals.
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