Dissimilar trend of nonlinearity in ultrasound transducers and systems at resonance and non-resonance frequencies

Negareh Ghasemi, Firuz Zare, Pooya Davari, Mahinda Vilathgamuwa, Arindam Ghosh, Christian Langton, Peter Weber

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

2 Citationer (Scopus)
65 Downloads (Pure)

Resumé

Several factors can affect performance of an ultrasound system such as quality of excitation signal and ultrasound transducer behaviour. Nonlinearity of piezoelectric ultrasound transducers is a key determinant in designing a proper driving power supply. Although, the nonlinearity of piezoelectric transducer impedance has been discussed in different literatures, the trend of the nonlinearity at different frequencies with respect to excitation voltage variations has not been clearly investigated in practice. In this paper, to demonstrate how the nonlinearity behaves, a sandwich piezoceramic transducer was excited at different frequencies. Different excitation signals were generated using a linear power amplifier and a multilevel converter within a range of 30–200 V. Empirical relation was developed to express the resistance of the piezoelectric transducer as a nonlinear function of both excitation voltage and resonance frequency. The impedance measurements revealed that at higher voltage ranges, the piezoelectric transducer can be easily saturated. Also, it was shown that for the developed ultrasound system composed of two transducers (one transmitter and one receiver), the output voltage measured across receiver is a function of a voltage across the resistor in the RLC branches and is related to the resonance frequencies of the ultrasound transducer.
OriginalsprogEngelsk
TidsskriftUltrasonics
Vol/bind74
Sider (fra-til)21-29
Antal sider9
ISSN0041-624X
DOI
StatusUdgivet - feb. 2017

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nonresonance
piezoelectric transducers
transducers
nonlinearity
trends
electric potential
excitation
receivers
linear amplifiers
impedance measurement
transmitter receivers
power amplifiers
determinants
resistors
power supplies
converters
high voltages
impedance
output

Citer dette

Ghasemi, Negareh ; Zare, Firuz ; Davari, Pooya ; Vilathgamuwa, Mahinda ; Ghosh, Arindam ; Langton, Christian ; Weber, Peter. / Dissimilar trend of nonlinearity in ultrasound transducers and systems at resonance and non-resonance frequencies. I: Ultrasonics. 2017 ; Bind 74. s. 21-29.
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abstract = "Several factors can affect performance of an ultrasound system such as quality of excitation signal and ultrasound transducer behaviour. Nonlinearity of piezoelectric ultrasound transducers is a key determinant in designing a proper driving power supply. Although, the nonlinearity of piezoelectric transducer impedance has been discussed in different literatures, the trend of the nonlinearity at different frequencies with respect to excitation voltage variations has not been clearly investigated in practice. In this paper, to demonstrate how the nonlinearity behaves, a sandwich piezoceramic transducer was excited at different frequencies. Different excitation signals were generated using a linear power amplifier and a multilevel converter within a range of 30–200 V. Empirical relation was developed to express the resistance of the piezoelectric transducer as a nonlinear function of both excitation voltage and resonance frequency. The impedance measurements revealed that at higher voltage ranges, the piezoelectric transducer can be easily saturated. Also, it was shown that for the developed ultrasound system composed of two transducers (one transmitter and one receiver), the output voltage measured across receiver is a function of a voltage across the resistor in the RLC branches and is related to the resonance frequencies of the ultrasound transducer.",
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Dissimilar trend of nonlinearity in ultrasound transducers and systems at resonance and non-resonance frequencies. / Ghasemi, Negareh; Zare, Firuz; Davari, Pooya; Vilathgamuwa, Mahinda; Ghosh, Arindam; Langton, Christian; Weber, Peter.

I: Ultrasonics, Bind 74, 02.2017, s. 21-29.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Dissimilar trend of nonlinearity in ultrasound transducers and systems at resonance and non-resonance frequencies

AU - Ghasemi, Negareh

AU - Zare, Firuz

AU - Davari, Pooya

AU - Vilathgamuwa, Mahinda

AU - Ghosh, Arindam

AU - Langton, Christian

AU - Weber, Peter

PY - 2017/2

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N2 - Several factors can affect performance of an ultrasound system such as quality of excitation signal and ultrasound transducer behaviour. Nonlinearity of piezoelectric ultrasound transducers is a key determinant in designing a proper driving power supply. Although, the nonlinearity of piezoelectric transducer impedance has been discussed in different literatures, the trend of the nonlinearity at different frequencies with respect to excitation voltage variations has not been clearly investigated in practice. In this paper, to demonstrate how the nonlinearity behaves, a sandwich piezoceramic transducer was excited at different frequencies. Different excitation signals were generated using a linear power amplifier and a multilevel converter within a range of 30–200 V. Empirical relation was developed to express the resistance of the piezoelectric transducer as a nonlinear function of both excitation voltage and resonance frequency. The impedance measurements revealed that at higher voltage ranges, the piezoelectric transducer can be easily saturated. Also, it was shown that for the developed ultrasound system composed of two transducers (one transmitter and one receiver), the output voltage measured across receiver is a function of a voltage across the resistor in the RLC branches and is related to the resonance frequencies of the ultrasound transducer.

AB - Several factors can affect performance of an ultrasound system such as quality of excitation signal and ultrasound transducer behaviour. Nonlinearity of piezoelectric ultrasound transducers is a key determinant in designing a proper driving power supply. Although, the nonlinearity of piezoelectric transducer impedance has been discussed in different literatures, the trend of the nonlinearity at different frequencies with respect to excitation voltage variations has not been clearly investigated in practice. In this paper, to demonstrate how the nonlinearity behaves, a sandwich piezoceramic transducer was excited at different frequencies. Different excitation signals were generated using a linear power amplifier and a multilevel converter within a range of 30–200 V. Empirical relation was developed to express the resistance of the piezoelectric transducer as a nonlinear function of both excitation voltage and resonance frequency. The impedance measurements revealed that at higher voltage ranges, the piezoelectric transducer can be easily saturated. Also, it was shown that for the developed ultrasound system composed of two transducers (one transmitter and one receiver), the output voltage measured across receiver is a function of a voltage across the resistor in the RLC branches and is related to the resonance frequencies of the ultrasound transducer.

KW - High power ultrasound transducer

KW - Nonlinear behaviour

KW - Ultrasound system excitation

KW - Power electronic converters

U2 - 10.1016/j.ultras.2016.09.023

DO - 10.1016/j.ultras.2016.09.023

M3 - Journal article

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JO - Ultrasonics

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SN - 0041-624X

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