Electrical method for crosstalk cancellation in transducer arrays

Bybi, Abdelmajid; Granger, C.; Grondel, Sébastien; Hladky‐Hennion, Anne‐Christine; Assaad, Jamal

doi:10.1016/j.ndteint.2013.12.003

Cited by 16 publications

(11 citation statements)

References 24 publications

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“…The experimental results are then compared to those obtained numerically using 2D Finite Elements Method (Fig. 17) [27]. According to Fig.…”

Section: Displacement Measurementsmentioning

confidence: 99%

“…It investigates the geometry and dimensions of the kerf filling material [19][20] particularly, the optimization of the front matching layers [21][22][23] and the improvement of the Printed Circuit Board (PCB) are utilized to connect the transducer array elements [24][25]. The second method is based on corrective electrical excitations applied to the array's elements to minimize the parasitic displacements and thus reducing crosstalk [26][27][28][29]. The last approach concerns specific treatments realized on the excitation and reception signals to minimize crosstalk [17,30].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Characterization of A Piezoelectric Transducer Array Taking into Account Crosstalk Phenomenon

Bybi

Khouili

Granger

et al. 2020

Int. j. eng. technol. innov.

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Ultrasonic transducer arrays are generally composed of several piezoelectric elements arranged in 1D or 2D ways. Crosstalk is an undesirable phenomenon decreasing the performance of these devices. It generates parasitic displacements at the elements' radiating surfaces, which changes the directivity of the array. Furthermore, the transducer's displacement plays a critical role in terms of the focal area and transferred intensities. The objective of this paper is to characterize a piezoelectric array composed of seven-elements made of PZ 27 ceramic experimentally. It investigates the effects of the crosstalk phenomenon on the array's performance in particular. The results have shown that the array's elements vibrate mainly in thickness mode, but the displacement is not uniform along their length due to the contribution of a parasitic length mode. Moreover, the major parasitic displacements are obtained on the neighboring passive elements: about -7.3 dB, -11 dB, and -12 dB, on the first, the second, and the third elements, respectively.

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“…The experimental results are then compared to those obtained numerically using 2D Finite Elements Method (Fig. 17) [27]. According to Fig.…”

Section: Displacement Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Characterization of A Piezoelectric Transducer Array Taking into Account Crosstalk Phenomenon

Bybi

Khouili

Granger

et al. 2020

Int. j. eng. technol. innov.

View full text Add to dashboard Cite

show abstract

“…향을 미치는 상호간섭을 저감하기 위하여 1차원 배 열 압전 초음파 변환기 내 커프의 영향을 분석한 연 구 결과가 발표된 바 있다. [6,7] 또한 상호간섭 저감을 위해 일부 선행 연구자들은 평면배열 pMUT(piezoelectric Micromachined Ultrasonic Transducer) 내 트랜스듀서의 구조를 변경하였고, [8] 1차원 배열 트랜스듀서 내 인 가전압을 다르게 하여 상호간섭의 정도를 분석하 였고, [9] 의료용 초음파 배열 트랜스듀서 내 주 커프와 부 커프 충진재 물질 변화를 통해 상호간섭을 분석 하였고, [10] 평면배열 cMUT(capacitive Micromachined Ultrasonic Transducer) 내 송신부와 수신부 사이 벽 또 는 홈을 통해 상호간섭을 저감하고자 하였다. …”

Section: 서 론unclassified

A study on the reduction of crosstalk in a two-dimensional planar array of underwater acoustic transducers

Park¹,

Roh²

2016

The Journal of the Acoustical Society of Korea

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In this work, we proposed various structural methods to reduce the crosstalk between elements in a planar array of underwater acoustic transducers and investigated the efficacy of each method through finite element analysis. It is shown that the effects of crosstalk reduction increase as the depth of the kerf among elements and the width of the kerf increase, and the elastic stiffness of the kerf filler decreases. Results of this study are expected to be useful in designing the structure of underwater acoustic planar array transducers to maximize their performance.

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“…These layers were designed and fabricated to have a thickness of λ/4 (where λ is the US wavelength). This kind of matching layers have high efficiency response with Gaussian shaped pass-bands [18,19];…”

Section: Us Transducer -Fabricationmentioning

confidence: 99%

A-scan ultrasound system for real-time puncture safety assessment during percutaneous nephrolithotomy

Rodrigues

Fonseca

et al. 2015

Medical Imaging 2015: Ultrasonic Imaging and Tomography

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Background: Kidney stone is a major universal health problem, affecting 10% of the population worldwide. Percutaneous nephrolithotomy is a first-line and established procedure for disintegration and removal of renal stones. Its surgical success depends on the precise needle puncture of renal calyces, which remains the most challenging task for surgeons. This work describes and tests a new ultrasound based system to alert the surgeon when undesirable anatomical structures are in between the puncture path defined through a tracked needle.Methods: Two circular ultrasound transducers were built with a single 3.3-MHz piezoelectric ceramic PZT SN8, 25.4 mm of radius and resin-epoxy matching and backing layers. One matching layer was designed with a concave curvature to work as an acoustic lens with long focusing. The A-scan signals were filtered and processed to automatically detect reflected echoes.Results: The transducers were mapped in water tank and tested in a study involving 45 phantoms. Each phantom mimics different needle insertion trajectories with a percutaneous path length between 80 and 150 mm. Results showed that the beam cross-sectional area oscillates around the ceramics radius and it was possible to automatically detect echo signals in phantoms with length higher than 80 mm.Conclusions: This new solution may alert the surgeon about anatomical tissues changes during needle insertion, which may decrease the need of X-Ray radiation exposure and ultrasound image evaluation during percutaneous puncture.

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Electrical method for crosstalk cancellation in transducer arrays

Cited by 16 publications

References 24 publications

Experimental Characterization of A Piezoelectric Transducer Array Taking into Account Crosstalk Phenomenon

Experimental Characterization of A Piezoelectric Transducer Array Taking into Account Crosstalk Phenomenon

A study on the reduction of crosstalk in a two-dimensional planar array of underwater acoustic transducers

A-scan ultrasound system for real-time puncture safety assessment during percutaneous nephrolithotomy

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