Structural model of standard ultrasonic transducer array developed for FEM analysis of mechanical crosstalk

Celmer, Mateusz; Opieliński, Krzysztof J.; Dopierała, M.

doi:10.1016/j.ultras.2017.06.006

Cited by 19 publications

(5 citation statements)

References 11 publications

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“…Dt max ¼ CFL: hmax c ¼ CFL 5:fmax , where f max is the greatest ultrasonic wave frequency has been used in the simulations (Celmer et al, 2017). The time interval (DtÞ was set approximately 10 À7 s in all simulations.…”

Section: Pressure Acoustics Modelingmentioning

confidence: 99%

Design, simulation, fabrication and testing of ultrasonic gas flowmeter transducer (sensor)

Mousavi

Hashemabadi

Moghaddam

2019

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Purpose Invasive transit-time ultrasonic flow measurement involves the use of ultrasonic transducers, which sense the flowing fluid and are the most important parts of an ultrasonic flowmeter. In this study, two ultrasonic transducers were designed, numerically simulated and fabricated to be used in an ultrasonic gas flowmeter. Design/methodology/approach PZT-5H piezoceramic elements with specific dimensions were designed and used as beating heart inside the transducers. Different methods, including impedance-frequency analysis, optical emission spectroscopy and performance tests in pressurized chambers were used to evaluate the piezoelectric elements, ultrasonic transducer housings and the fabricated transducers, respectively. In addition, finite element method results showed its ability for design stages of ultrasonic transducer. Findings Experimental results for transit time difference (TTD) and the normalized received voltage were compared with simulation results at the same conditions. There was a quite good agreement between the two method results. Extensive simulation results showed that under the considered range of environmental conditions, the change of acoustic path length has the most impact on TTD, with respect to temperature and pressure. A change of 1 mm in acoustic path length leads to 0.74 per cent change in TTD, approximately. In addition, for normalized received voltage, 1 bar change in pressure has the most impact and its value is as high as 3.76 per cent. Practical implications This method is possibly used in ultrasonic gas flowmeter fabrication. Originality/value In this work, design, fabrication, experimental tests and numerical simulation of ultrasonic transducers are presented.

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Section: Pressure Acoustics Modelingmentioning

confidence: 99%

Design, simulation, fabrication and testing of ultrasonic gas flowmeter transducer (sensor)

Mousavi

Hashemabadi

Moghaddam

2019

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“…When two or more PZT are used, it is possible that some induced interferences appear depending on the application. One induced interference that can be studied and exploited in Structural Health Monitoring (SHM) and other applications that use multiple PZTs is the crosstalk, which is a phenomenon intrinsically associated with the PZT properties that appears when one or more PZT are closely placed [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Crosstalk Effects in Matrix of PZT Sensors for SHM Applications Based on the Electromechanical Impedance Principle

FILHO,

CADALSO,

LEDESMA

et al. 2023

Proceedings of the 14th International Workshop on Structural Health Monitoring

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Using PZT transducers leads to different structural health monitoring techniques, such as those based on Frequency Response Function and Lamb Waves. When two or more PZT transducers are closely placed, an important interference, namely crosstalk, appears. This approach verified that such an effect can be modelled and implemented as a technique to detect damage. Accordingly, this work aims to present a methodology for studying the crosstalk effect in arrangements of PZT, where the electromechanical impedance (EMI) is used as a parameter of a PZT arrangement modelled as a coupled transmission line. For that purpose, the eigenvalues of a coupled electromechanical impedance matrix are obtained. We anticipate that the structural damage will influence the EMI signatures and the modelled matrix will be distinct for the healthy and damaged conditions. The proposed methodology was tested by simulating a simple Structural Health Monitoring system based on the EMI technique. The simulated structure was considered as a homogeneous medium in which two small PZT transducers separated by 6mm were attached. Two independent damages were simulated in the structure at 10 mm and 30 mm from each PZT. The initial simulations were implemented using the software SPICE and the crosstalk was estimated in time-domain. Some metric damage indices demonstrated the effectiveness of the proposed methodology.

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“…Ultrasonic transducers (UT) have a history of more than 100 years in the technical field worldwide and have been widely used in various industries [1,2]. In the field of medicine [3,4], UTs are used for medical applications such as b-scan * Author to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

A piezoelectric micromachined ultrasonic transducer with mechanical grooves

Zhou

Cai

et al. 2021

J. Micromech. Microeng.

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This paper presents a novel architecture for annular and circular electrode piezoelectric micromachined ultrasound transducers (AC-PMUTs) with mechanical grooves. The mechanical grooves reduce stress and increase the vibration area of the membrane, resulting in enhanced vibrational deformation amplitude, transmission sensitivity, mechanical coupling coefficient (), quality factor (Q), and emission sound pressure level (SPL). Compared with conventional AC-PMUTs without mechanical grooves, the transmitting displacement sensitivity was measured as 419.4 NM V−1, which increased by 128.73%; the mechanical coupling coefficient () was measured as 6.09%, which increased by 116.43%; and the quality factor (Q) was measured as 90.68, which is an increase of 241.3%. The mechanical grooves also increased the emission SPL of PMUT at the same operating frequency. In the range of 10 kHz–70 kHz, the emission SPL of the optimum AC-PMUT with mechanical grooves can be improved in the range of 2.8 dB–28.8 dB. In general, AC-PMUTs with mechanical grooves have great potential in various emission ultrasound applications, such as distance measurement and object detection.

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Structural model of standard ultrasonic transducer array developed for FEM analysis of mechanical crosstalk

Cited by 19 publications

References 11 publications

Design, simulation, fabrication and testing of ultrasonic gas flowmeter transducer (sensor)

Design, simulation, fabrication and testing of ultrasonic gas flowmeter transducer (sensor)

Crosstalk Effects in Matrix of PZT Sensors for SHM Applications Based on the Electromechanical Impedance Principle

A piezoelectric micromachined ultrasonic transducer with mechanical grooves

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