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A Novel Approach to Active 2D Sonar
By Leon Fay, Miranda Ha, and Vinith Misra (a.k.a The Tunafish Team)
Abstract
This project will implement a phase-array sonar system that will create a two-dimensional map of the environment directly in front of the array and display it on a screen for the user. The system will consist of one acoustic transmitter and a number of receivers. The receivers will be placed in a linear array spaced appropriately. Analysis of the phase relationships (to determine the angle) and delays (to calculate distances) in the receivers will allow a two-dimensional map of the environment to be drawn.
The project will consist of three parts: a signal processor, a master controller, and a display module. The signal processor will manipulate the phases of the different received signals to determine the distance to the target at a certain angle. The master controller dictates when data is gathered, processed, and post-processed. The display module will make a two-dimensional color-coded map that shows distance and highlights edges. There will also be alternate display modes that show waveforms of received signals to help with debugging.
Project Files
Presentation (PDF)
Report (PDF)
Report Appendix (PDF)