Low Cost 2D Multibeam Sonar

This project is an attempt to develop a low cost 2D multibeam sonar using circuit typologies, processing algorithms, and materials that are somewhat unconventional.

A prototype that can generate images has been built, and I am now trying to verify its performance under different conditions, among other things by using the USV I am building.

The size of the unit is 200 x 62 x 120 (mm) and the operating frequency is 570kHz. The array is 80 (mm) long with 32 elements and the viewing angle is 60 deg.

The everlasting charm of photographs

Sonar mounted in a bracket

Low water at Test Site. The pier can be located in the sonar images below.

In the pool, projector directivity tests are performed using an automatic setup. Below are some results. The directivity of the projector does not match the simulation and some fine tuning is needed. However, the symmetry in the plots is promising.

The everlasting charm of photographs

Horizontal

Vertical

Simulated Far-Field
Directivity

Automatic Directivity Test in the Pool

The everlasting charm of photographs

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