Investigation for Wide-Band Underwater Ultrasonic Transducers

Takeshi INOUE; Takatoshi NADA; Akira KAMEYAMA; Katsumi SUGIUCHI; Sadayuki TAKAHASHI; Masashi KONNO

Investigation for Wide-Band Underwater Ultrasonic Transducers

Takeshi INOUE, Takatoshi NADA, Akira KAMEYAMA, Katsumi SUGIUCHI, Sadayuki TAKAHASHI, Masashi KONNO

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A wideband and high efficiency underwater ultrasonic transducer with a single acoustic matching plate has been presented. The transducer consists of a piezoelectric ceramic resonator, operating in unstiffened longitudinal mode, and a single acoustic matching plate bonded to the ceramic resonator. The matching plate is made of a Al₂O₃-epoxy composite. The ceramic resonator is T-shaped with a taper, where its polarized part is a thin rectangular bar, which can be driven with low voltage, and where its non-polarized parts comprise a horn part and a head part. The transducer has been designed based on a double mode filter synthesis theory, because it has two resonant modes, whose phases differ byπfrom each other. The optimum specific acoustic impedance and length for the matching plate have been calculated. The 30 kHz array, including four transducers supported at their vibrational nodes, has been fabricated and evaluated. As a result, it has been confirmed that the array has the following characteristics: 33% fractional bandwidth, 211.6 dB sound pressure level re lµPa at l meter,177 dB receiving voltage sensitvity re 1 V/µPa and possible operating depth over 3000 meters. Excellent agreement between theoretical values and experimental results has been obtained. It has been proved that this transducer is useful as a transducer with high resolution for deep oceans.

Publication: IEICE TRANSACTIONS on transactions Vol.E70-E No.8 pp.723-734

Publication Date: 1987/08/25

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Type of Manuscript: PAPER

Category: Ultrasonics

Authors

Takeshi INOUE
Takatoshi NADA
Akira KAMEYAMA
Katsumi SUGIUCHI
Sadayuki TAKAHASHI
Masashi KONNO

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Takeshi INOUE, Takatoshi NADA, Akira KAMEYAMA, Katsumi SUGIUCHI, Sadayuki TAKAHASHI, Masashi KONNO, "Investigation for Wide-Band Underwater Ultrasonic Transducers" in IEICE TRANSACTIONS on transactions, vol. E70-E, no. 8, pp. 723-734, August 1987, doi: .
Abstract: A wideband and high efficiency underwater ultrasonic transducer with a single acoustic matching plate has been presented. The transducer consists of a piezoelectric ceramic resonator, operating in unstiffened longitudinal mode, and a single acoustic matching plate bonded to the ceramic resonator. The matching plate is made of a Al₂O₃-epoxy composite. The ceramic resonator is T-shaped with a taper, where its polarized part is a thin rectangular bar, which can be driven with low voltage, and where its non-polarized parts comprise a horn part and a head part. The transducer has been designed based on a double mode filter synthesis theory, because it has two resonant modes, whose phases differ byπfrom each other. The optimum specific acoustic impedance and length for the matching plate have been calculated. The 30 kHz array, including four transducers supported at their vibrational nodes, has been fabricated and evaluated. As a result, it has been confirmed that the array has the following characteristics: 33% fractional bandwidth, 211.6 dB sound pressure level re lµPa at l meter,177 dB receiving voltage sensitvity re 1 V/µPa and possible operating depth over 3000 meters. Excellent agreement between theoretical values and experimental results has been obtained. It has been proved that this transducer is useful as a transducer with high resolution for deep oceans.
URL: https://globals.ieice.org/en_transactions/transactions/10.1587/e70-e_8_723/_p

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@ARTICLE{e70-e_8_723,
author={Takeshi INOUE, Takatoshi NADA, Akira KAMEYAMA, Katsumi SUGIUCHI, Sadayuki TAKAHASHI, Masashi KONNO, },
journal={IEICE TRANSACTIONS on transactions},
title={Investigation for Wide-Band Underwater Ultrasonic Transducers},
year={1987},
volume={E70-E},
number={8},
pages={723-734},
abstract={A wideband and high efficiency underwater ultrasonic transducer with a single acoustic matching plate has been presented. The transducer consists of a piezoelectric ceramic resonator, operating in unstiffened longitudinal mode, and a single acoustic matching plate bonded to the ceramic resonator. The matching plate is made of a Al₂O₃-epoxy composite. The ceramic resonator is T-shaped with a taper, where its polarized part is a thin rectangular bar, which can be driven with low voltage, and where its non-polarized parts comprise a horn part and a head part. The transducer has been designed based on a double mode filter synthesis theory, because it has two resonant modes, whose phases differ byπfrom each other. The optimum specific acoustic impedance and length for the matching plate have been calculated. The 30 kHz array, including four transducers supported at their vibrational nodes, has been fabricated and evaluated. As a result, it has been confirmed that the array has the following characteristics: 33% fractional bandwidth, 211.6 dB sound pressure level re lµPa at l meter,177 dB receiving voltage sensitvity re 1 V/µPa and possible operating depth over 3000 meters. Excellent agreement between theoretical values and experimental results has been obtained. It has been proved that this transducer is useful as a transducer with high resolution for deep oceans.},
keywords={},
doi={},
ISSN={},
month={August},}

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TY - JOUR
TI - Investigation for Wide-Band Underwater Ultrasonic Transducers
T2 - IEICE TRANSACTIONS on transactions
SP - 723
EP - 734
AU - Takeshi INOUE
AU - Takatoshi NADA
AU - Akira KAMEYAMA
AU - Katsumi SUGIUCHI
AU - Sadayuki TAKAHASHI
AU - Masashi KONNO
PY - 1987
DO -
JO - IEICE TRANSACTIONS on transactions
SN -
VL - E70-E
IS - 8
JA - IEICE TRANSACTIONS on transactions
Y1 - August 1987
AB - A wideband and high efficiency underwater ultrasonic transducer with a single acoustic matching plate has been presented. The transducer consists of a piezoelectric ceramic resonator, operating in unstiffened longitudinal mode, and a single acoustic matching plate bonded to the ceramic resonator. The matching plate is made of a Al₂O₃-epoxy composite. The ceramic resonator is T-shaped with a taper, where its polarized part is a thin rectangular bar, which can be driven with low voltage, and where its non-polarized parts comprise a horn part and a head part. The transducer has been designed based on a double mode filter synthesis theory, because it has two resonant modes, whose phases differ byπfrom each other. The optimum specific acoustic impedance and length for the matching plate have been calculated. The 30 kHz array, including four transducers supported at their vibrational nodes, has been fabricated and evaluated. As a result, it has been confirmed that the array has the following characteristics: 33% fractional bandwidth, 211.6 dB sound pressure level re lµPa at l meter,177 dB receiving voltage sensitvity re 1 V/µPa and possible operating depth over 3000 meters. Excellent agreement between theoretical values and experimental results has been obtained. It has been proved that this transducer is useful as a transducer with high resolution for deep oceans.
ER -