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Ultrasonic Sensing Technologies
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Ultrasonic Sensing Technologies

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Physical Sensors".

Deadline for manuscript submissions: closed (30 June 2022) | Viewed by 6398

Special Issue Editors

Dr. Anne Bernassau

E-Mail Website
Guest Editor
School of Engineering and Physical Sciences, Heriot Watt University, Edinburgh EH14 4AS, UK
Interests: ultrasonic sensors; ultrasonic transducers fabrication; micro-fabrication; transducer arrays; acoustofluidics; acoustic particle manipulation; piezoelectric materials
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Marco Aurélio Brizzotti Andrade

E-Mail Website
Guest Editor
Institute of Physics, University of São Paulo, São Paulo 05508-060, Brazil
Interests: acoustic levitation; ultrasonics; piezoelectric devices

Special Issue Information

Dear Colleagues,

Ultrasonic-based sensors have numerous applications in different fields, such as medicine, industry, agriculture, and consumer goods. This Special Issue on ultrasonic sensing technologies aims to collect original research, review, and perspective articles covering different aspects of ultrasonic sensing technology. Potential topics for this Special Issue include, but are not restricted to:

- development of sensors based on ultrasonic waves

- theoretical studies involving the generation and propagation of ultrasonic waves

- ultrasonic signal analysis and processing

- characterization of new ultrasonic devices

- control software 

- numerical simulation

- electronics

- materials for ultrasonic sensors

- acoustic sorting

- novel applications

Dr. Anne Bernassau
Prof. Dr. Marco Aurélio Brizzotti Andrade
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sensors is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Published Papers (3 papers)

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Research

11 pages, 4516 KiB  
Article
Gain-Phase Error-Calibrated Piezoelectric Sensor Array-Based Impact Localization on Stiffened Curved Composite Structures
by Zhiling Wang, Jinyu Zhou, Yongteng Zhong and Chaoyue Li
Sensors 2022, 22(15), 5879; https://0-doi-org.brum.beds.ac.uk/10.3390/s22155879 - 05 Aug 2022
Viewed by 1039
Abstract
Stiffened structure-induced gain-phase errors degrade the performance of the high-resolution two-dimensional multiple signal classification (2D-MUSIC) algorithm, which makes it impossible to ensure the high accuracy of impact localization results. To eliminate the localization bias caused by these errors, a calibrated 2D-MUSIC-based impact localization [...] Read more.
Stiffened structure-induced gain-phase errors degrade the performance of the high-resolution two-dimensional multiple signal classification (2D-MUSIC) algorithm, which makes it impossible to ensure the high accuracy of impact localization results. To eliminate the localization bias caused by these errors, a calibrated 2D-MUSIC-based impact localization method is first introduced. Firstly, time-frequency characteristics of the non-stationary impact signals are evaluated by experiment to obtain a clear first wave packet or a wave packet that purely corresponds to a single mode through continuous wavelet transform (CWT). Then, the uniform linear array covariance matrix with gain-phase errors is calibrated to be constructed as a Toeplitz structural matrix. By reconstructing covariance matrix R, 2D-MUSIC-based impact localization is calibrated for stiffened curved composite structures. Experimental research on the stiffened curved composite panel is carried out, and these impact localization results demonstrate the validity and effectiveness of the calibrated 2D-MUSIC-based method. Full article
(This article belongs to the Special Issue Ultrasonic Sensing Technologies)
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13 pages, 2689 KiB  
Article
FPCB as an Acoustic Matching Layer for 1D Linear Ultrasound Transducer Arrays
by Taemin Lee, Joontaek Jung, Sang-Mok Lee, Jongcheol Park, Jae-Hyeong Park, Kyung-Wook Paik and Hyunjoo J. Lee
Sensors 2022, 22(15), 5557; https://0-doi-org.brum.beds.ac.uk/10.3390/s22155557 - 25 Jul 2022
Cited by 2 | Viewed by 3204
Abstract
An acoustic matching layer is an essential component of an ultrasound transducer to achieve maximum ultrasound transmission efficiency. Here, we develop a flexible printed circuit board (FPCB) with a composite structure consisting of multiple polyimide and copper layers and demonstrate it as a [...] Read more.
An acoustic matching layer is an essential component of an ultrasound transducer to achieve maximum ultrasound transmission efficiency. Here, we develop a flexible printed circuit board (FPCB) with a composite structure consisting of multiple polyimide and copper layers and demonstrate it as a novel acoustic matching layer. With a flexible substrate and robust ACF bonding, the FPCB not only serves as an acoustic matching layer between piezoelectric elements and the surrounding medium but also as a ground for the electrical connection between the transducer array elements and the folded substrate. A 1D linear ultrasound transducer array with the FPCB matching layer exhibits larger output pressure, wider -3dB bandwidth, and higher ultrasound beam intensity compared to that of an ultrasound transducer array with the alumina/epoxy matching layer, which is one of the most commonly applied composite matching layers. The enhanced transmission performance verifies that the proposed FPCB is an excellent matching layer for 1D linear ultrasound transducer arrays. Full article
(This article belongs to the Special Issue Ultrasonic Sensing Technologies)
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22 pages, 1649 KiB  
Article
An Ultrasonic Laminated Transducer for Viscoelastic Media Detection
by Shunmin Yang, Wenai Song, Yifang Chen, Lu Yang, Mingquan Wang, Yongjian Lian and Kangchi Liu
Sensors 2021, 21(21), 7188; https://0-doi-org.brum.beds.ac.uk/10.3390/s21217188 - 29 Oct 2021
Viewed by 1395
Abstract
Based on the principle of underwater transducers, an ultrasonic four-laminated transducer with a frequency of 1 MHz was proposed to solve the problem of large energy attenuation when ultrasonic waves propagate in viscoelastic media. First, this study targeted solid rocket propellant as the [...] Read more.
Based on the principle of underwater transducers, an ultrasonic four-laminated transducer with a frequency of 1 MHz was proposed to solve the problem of large energy attenuation when ultrasonic waves propagate in viscoelastic media. First, this study targeted solid rocket propellant as the research object, and the energy attenuation characteristics of ultrasonic waves propagating in viscoelastic media were analyzed through the derivation of the wave equation. Second, the structure of a four-laminated transducer with a frequency of 1 MHz was designed, and the resonance frequency was obtained by a graphical method. The sound field simulation and experimental results showed that the gain of the four-laminated transducer was 15 dB higher than that of the single-wafer transducer. An ultrasonic feature scanning system was built to complete the qualitative and quantitative detection of the smallest artificial hole (ϕ2 mm × 10 mm). Finally, two different natural defects were scanned, and the results were compared with those obtained using an industrial computed tomography detection system. The results showed that the ultrasonic method was more accurate in characterizing two natural defects. The primary cause was that the industrial CT was not sensitive to defects parallel to the incident direction of the ray. Therefore, this study not only achieved the qualitative and quantitative nondestructive testing of solid rocket propellants, but also provides an important reference for other viscoelastic components. Full article
(This article belongs to the Special Issue Ultrasonic Sensing Technologies)
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