High frequency wide beam PVDF ultrasonic projector for underwater communications

Martins, M. S.; Barardo, C.; Matos, T.; Gonçalves, L. M.; Cabral, J.; Silva, António; Jesus, Sergio

http://hdl.handle.net/10400.1/13279

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Abstract(s)

This work describes the development and characterization of a wide beam and wideband ultrasonic transducer, designed as an emitter for underwater communications up to 1.5 MHz. The active element being used is composed of two layers of 110 mu m PVDF (Polyvinylidene fluoride) film, with NiCu electrodes. The transducer has a semicircular shape with a diameter of 15 cm. Pool trials show a transmitting voltage response of approximately 150 dB re mu Pa/V @ 1m from 750kHz to 1MHz and higher than 130 dB re mu Pa/V @ 1m between 250kHz and 1.5MHz. At 1 MHz, when excited with 12V, the transducer has a power consumption of 37.5 mW.

Keywords

Emitter transducers

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http://hdl.handle.net/10400.1/13279

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