Abstract

A prototype of a tunable sonar transducer has been successfully tested in the transmit/receive mode. It employs a tunable sandwich transducer which is a high-Q transmitter with resonance frequency that can be shifted continuously over a wide frequency range between the fundamental harmonic at 27 kHz and the first overtone at 73 kHz of the whole structure. The tunable sandwich transducer divides the active piezoelectric layer to two sets. The first is the control ceramic whose function is to vary the resonance frequency of the overall structure by using various values of inductor across its terminals. The control ceramic is mechanically coupled to the drive ceramic which provides the acoustic power during transmission and alternately acts as a receiver. From the transmit/receive measurements within the tunable frequency range, the receiving sensitivity of the tunable transducer may be varied between 0 and 9 μV/Pa. Generally, the receiving sensitivity is higher at the mechanical resonance frequencies and lower in the mid-frequency range. The receiving sensitivity of the tunable transducer at the fundamental harmonic is 9 μV/Pa (−221 dB re 1 V/μPa) which is similar to 11 μV/Pa (−219 dB re 1 V/μPa) for the sensitivity when driven as a conventional sandwich transducer.

Original languageEnglish
JournalInstrumentation Science and Technology
DOIs
Publication statusPublished - 1 Jan 2019

Fingerprint

sonar
Sonar
transducer
Transducers
transducers
ceramics
frequency ranges
sensitivity
harmonics
resonant vibration
power transmission
active layer
inductors
Power transmission
transmitters
Q factors
Transmitters
acoustics
receivers
Acoustics

Keywords

  • Drive ceramic
  • receiving sensitivity
  • tunable transducer
  • tuning ceramic

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Instrumentation
  • Environmental Science(all)

Cite this

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title = "Tunable sonar transducer",
abstract = "A prototype of a tunable sonar transducer has been successfully tested in the transmit/receive mode. It employs a tunable sandwich transducer which is a high-Q transmitter with resonance frequency that can be shifted continuously over a wide frequency range between the fundamental harmonic at 27 kHz and the first overtone at 73 kHz of the whole structure. The tunable sandwich transducer divides the active piezoelectric layer to two sets. The first is the control ceramic whose function is to vary the resonance frequency of the overall structure by using various values of inductor across its terminals. The control ceramic is mechanically coupled to the drive ceramic which provides the acoustic power during transmission and alternately acts as a receiver. From the transmit/receive measurements within the tunable frequency range, the receiving sensitivity of the tunable transducer may be varied between 0 and 9 μV/Pa. Generally, the receiving sensitivity is higher at the mechanical resonance frequencies and lower in the mid-frequency range. The receiving sensitivity of the tunable transducer at the fundamental harmonic is 9 μV/Pa (−221 dB re 1 V/μPa) which is similar to 11 μV/Pa (−219 dB re 1 V/μPa) for the sensitivity when driven as a conventional sandwich transducer.",
keywords = "Drive ceramic, receiving sensitivity, tunable transducer, tuning ceramic",
author = "Alwi, {Hasan Adli} and {Abd. Shukor}, Roslan and {Mohd Ghazali @ Fauzi}, Shahriman",
year = "2019",
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journal = "Instrumentation Science and Technology",
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AU - Mohd Ghazali @ Fauzi, Shahriman

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N2 - A prototype of a tunable sonar transducer has been successfully tested in the transmit/receive mode. It employs a tunable sandwich transducer which is a high-Q transmitter with resonance frequency that can be shifted continuously over a wide frequency range between the fundamental harmonic at 27 kHz and the first overtone at 73 kHz of the whole structure. The tunable sandwich transducer divides the active piezoelectric layer to two sets. The first is the control ceramic whose function is to vary the resonance frequency of the overall structure by using various values of inductor across its terminals. The control ceramic is mechanically coupled to the drive ceramic which provides the acoustic power during transmission and alternately acts as a receiver. From the transmit/receive measurements within the tunable frequency range, the receiving sensitivity of the tunable transducer may be varied between 0 and 9 μV/Pa. Generally, the receiving sensitivity is higher at the mechanical resonance frequencies and lower in the mid-frequency range. The receiving sensitivity of the tunable transducer at the fundamental harmonic is 9 μV/Pa (−221 dB re 1 V/μPa) which is similar to 11 μV/Pa (−219 dB re 1 V/μPa) for the sensitivity when driven as a conventional sandwich transducer.

AB - A prototype of a tunable sonar transducer has been successfully tested in the transmit/receive mode. It employs a tunable sandwich transducer which is a high-Q transmitter with resonance frequency that can be shifted continuously over a wide frequency range between the fundamental harmonic at 27 kHz and the first overtone at 73 kHz of the whole structure. The tunable sandwich transducer divides the active piezoelectric layer to two sets. The first is the control ceramic whose function is to vary the resonance frequency of the overall structure by using various values of inductor across its terminals. The control ceramic is mechanically coupled to the drive ceramic which provides the acoustic power during transmission and alternately acts as a receiver. From the transmit/receive measurements within the tunable frequency range, the receiving sensitivity of the tunable transducer may be varied between 0 and 9 μV/Pa. Generally, the receiving sensitivity is higher at the mechanical resonance frequencies and lower in the mid-frequency range. The receiving sensitivity of the tunable transducer at the fundamental harmonic is 9 μV/Pa (−221 dB re 1 V/μPa) which is similar to 11 μV/Pa (−219 dB re 1 V/μPa) for the sensitivity when driven as a conventional sandwich transducer.

KW - Drive ceramic

KW - receiving sensitivity

KW - tunable transducer

KW - tuning ceramic

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