Cavitation Detection in a Tonpilz-Type Transducer for Active SONAR Transmission System

The active sound navigation and ranging (SONAR) transmission system emits acoustic pulses underwater using a wave generator, SONAR power amplifier (SPA), projector. pulse travel in the direction of target return as an echo to hydrophone learn range or speed object. Often same device is used projector; this context, it known transducer. In order obtain maximum detection SONAR, desirable generate amount until point which can be detectable atmosphere with non-wished noise. Therefore, high value source level (SL) required that depends largely on electrical applied transducer (Pe). However, when trying there are following three peculiar limitations affect performance: cavitation, reverberation, effect interaction near field. paper, experimental measurement methodology presented detect cavitation effects tonpilz-type for projector calibrated hydroacoustic tank by measuring parameters total harmonic distortion fundamental waveform (THD-F) generated pulse, transmitting voltage response (TVR) characterize pressure (SPL) indicates intensity at given distance. Whereas reverberation field objects other study cases. A 570.21 W THD-F < 5% switched-mode (SMPA) prototype was developed excite electroacoustic employing full-bridge inverter (FBI) topology digital controller field-programmable gate array (FPGA) unipolar sine width modulation (SPWM) continuous (CW) frequency 11.6 kHz. results obtained show from Pe=196.05 1 m depth, increases significantly while behavior TVR SPL affected since not expected attributed occurs.