Broadband electrical impedance matching for piezoelectric ultrasound transducers

Huang, Haiying; Paramo, Daniel

doi:10.1109/tuffc.2011.2132

Cited by 92 publications

(58 citation statements)

References 20 publications

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“…It is well known that due to the resonances of the transducer, and the electrical and mechanical impedance, that some frequencies will not impart as much energy to the defects as others [10,15]. This effect is captured by plotting the electrical power curve in Figure 4.…”

Section: Effect Of Frequency On Powermentioning

confidence: 99%

A novel thermosonic imaging system for non-destructive testing

Willey¹,

Xiang²,

Long³

2017

AIP Conference Proceedings

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Abstract. Thermosonic infrared (Sonic IR) imaging is a new non-destructive testing (NDT) technique that uses highfrequency sonic excitation together with infrared (IR) detection to image surface and subsurface defects. A conventional Sonic IR imaging system employs an ultrasonic welder, which is designed to operate at a single frequency. This single frequency ultrasonic source has been found to yield a "blind zone" for NDT due to the formation of standing waves inside the test piece. To overcome this limitation, a spring loaded ultrasonic transducer was used to generate the desired multifrequency acoustic chaos in the test object [1]. The limitation of the spring loaded ultrasonic transducer is its repeatability and reproducibility for field applications. In this work, we present the development of a novel thermosonic imaging system, which is capable of exciting the ultrasonic transducer at different frequencies for thermosonic NDT to overcome the limitations associated with a single frequency power source as well as the spring loaded transducer design. A comparison of experimental results will be made between the single frequency and the developed multi-frequency thermosonic NDT systems.

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Section: Effect Of Frequency On Powermentioning

confidence: 99%

A novel thermosonic imaging system for non-destructive testing

Willey¹,

Xiang²,

Long³

2017

AIP Conference Proceedings

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“…In order to find out the resonant frequencies and the electrical impedance of an ultrasound transducer at different frequencies several tests are performed [21,22]. Due to a constraint of a network analyzer which operates at low voltage, other methods are used to measure the electrical impedance of the ultrasound transducer at higher voltage ranges.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2017

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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 V-200V. 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. Index TermsHigh power ultrasound transducer, nonlinear behaviour, ultrasound system excitation, power electronic converters Dissimilar trend of nonlinearity in ultrasound transducers and systems at resonance and non-resonance frequencies 2

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“…Haiying Huang and Daniel Paramo [6] have described a method to estimation equivalent parameter with an ultrasonic piezoelectric transducer and completed the broadband matching circuit with Smith chart.…”

Section: Introductionmentioning

confidence: 99%

Design of Broadband Matching Circuit for Underwater Acoustic Communication Transducer

Wang¹,

Sun²,

Yong³

2015

Advances in Intelligent Systems Research

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Abstract. The design of matching circuit for broadband underwater acoustic transducer is a key technology in sonar system. Matching circuit can reduce the energy loss of the power amplifier, extend the system bandwidth and improve the distortion of the transmitted waveform. In this paper, the theory of real frequency direct computational technique (RFDT) is discussed. Then, we design the matching circuit for a tubular transducer. Finally, the match performance is tested in anechoic pool. The results illustrate that the broadband matching circuit can expand the bandwidth and improve the efficiency of the transmitter. Compared with the transmitter without matching, the sound source level of the system increased about 10dB. Compared with the single inductor matching circuit, the work bandwidth is extended. The whole design process of broadband matching circuit completed with computer and without the equivalent circuit of the transducer, so the RFDT is fit for practical project.

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Broadband electrical impedance matching for piezoelectric ultrasound transducers

Cited by 92 publications

References 20 publications

A novel thermosonic imaging system for non-destructive testing

A novel thermosonic imaging system for non-destructive testing

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

Design of Broadband Matching Circuit for Underwater Acoustic Communication Transducer

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