underwater sonar system or fish finder design example needed

[totue]

I need underwater sonar system or fish finder design example.

thanks

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[singhjaya]

You can use a flat panckake spiral coil with a thin copper diaphram. Discharge a capacitor (0.1J to 100KJ) capacitor and you will have a nice short half sinusoidal pulse. Use a gated receiver looking for a single pulse return. You can get very good detail. I once made one about 10cm in dia with about 1000J capacitor, it would kill a gold fish with one pulse.

 

[totue]

Thanks but i need a reference design that use a piezzo element.

totue

 

[marjija]

I need some design examples for a sonar system using piezoelectric materials

Someone can help me?