Naslov
Sequential ultrasonic transducer for echo sounders on small and middle size vessels

Autori
Štimac, Alan ; Komeštik, Vladislav ; Ivančević, Bojan

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 15th International Conference on Applied Electromagentics and Communications / Bartolić, Juraj - Zagreb : Hrvatsko društvo za komunikacije, računarstvo, elektroniku, mjerenja I automatiku (KoREMA), 1999, 208-211

Skup
15th International Conference on Applied Electromagentics and Communications

Mjesto i datum
Dubrovnik, Hrvatska, 11.10.1999. - 13.10.1999

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
beam pattern; sensitivity; sonar equation; ultrasonic transducer

Sažetak
The aim of the study was to evaluate the possibility to use both significant modes of piezoelectric disc vibration to acchieve permanent contact of ultrasonic beam between the sea bed or reefs with wessel keel, where ultrasonic transducer are usually mounted. Starting with the theoretical analysis of piezoelectric element vibration in radial and thickness mode and construction requirements for ultrasonic transducers, electrical, acoustical and hidroacoustical parameters on both characteristical frequencies have been compared. Having in mind that most of commercial type echo sounders operate at thickness resonance frequency of the piezoelectric element and on the basis of obtained data, this paper confirms the practicability of using piezoelectric element vibration in radial mode for acchieving longer measuring ranges, with reduced accuracy and resolution, but with receiving/transmitting sensitivity and horizontal/vertical directivity comparable to those of the thickness mode.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA