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Special Issue "Applications of Ultrasonic Sensors"

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

Deadline for manuscript submissions: 30 March 2021.

Special Issue Editor

Prof. Dr. Jangmyung Lee
Website
Guest Editor
Department of Electronics Engineering, Pusan National University, Pusan 46241, Korea
Interests: tactile sensors; force/torque sensors; IMU applications; GPS applications; vision sensor

Special Issue Information

Dear Colleagues,

Ultrasonic signals are very useful for communications, localizations, and measurements. They are invisible and non-audible, which makes them very effective for private purposes.

This Special Issue is aimed at representing the latest advances in the applications of ultrasonic sensors. We welcome contributions in all fields of ultrasonic sensor applications, including new designs of ultrasonic sensors and signal processing algorithms.

Those include but are not limited to:

  • Ultrasonic communication systems;
  • Localization using ultrasonic signals;
  • Ultrasonic signal processing;
  • Ultrasonic 2D or 3D imaging;
  • Moving target indications;
  • Compressive sensing;
  • Emerging transmitters of opportunity for ultrasonic signals.

Prof. Dr. Jangmyung Lee
Guest Editor

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 papers will be 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 2200 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.

Keywords

  • ultrasonic communication
  • localization using ultrasonic signals
  • ultrasonic signal processing
  • ultrasonic measurement
  • ultrasonic sensor design
  • ultrasonic imaging

Published Papers (2 papers)

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Research

Open AccessArticle
Mode Analysis of Pt/LGS Surface Acoustic Wave Devices
Sensors 2020, 20(24), 7111; https://doi.org/10.3390/s20247111 - 11 Dec 2020
Abstract
Platinum (Pt) gratings on langasite (LGS) substrates are a widely used structures in high temperature surface acoustic wave (SAW) devices. Multiple modes can be excited in Pt/LGS SAW devices owing to the heavy weight of the Pt electrode and leaky waves [...] Read more.
Platinum (Pt) gratings on langasite (LGS) substrates are a widely used structures in high temperature surface acoustic wave (SAW) devices. Multiple modes can be excited in Pt/LGS SAW devices owing to the heavy weight of the Pt electrode and leaky waves in the LGS substrate. In this work, we report on a detailed mode analysis of Pt/LGS SAW devices, where three commonly used LGS cuts are considered. A three-dimensional (3D) finite element method (FEM) numerical model was developed, and the simulation and experiment results were compared. The experiment and simulation results showed that there are two modes excited in the Pt/LGS SAW devices with Euler angle (0°, 138.5°, 27°) and (0°, 138.5°, 117°), which are Rayleigh-type SAW and SH-type leaky wave, respectively. Only the Rayleigh-type mode was observed in the Pt/LGS SAW devices with Euler angle (0°, 138.5°, 72°). It was found that the acoustic velocities are dependent on the wavelength, which is attributed to the change of wave penetration depth in interdigital transducers (IDTs) and the velocity dispersion can be modulated by the thickness of the Pt electrode. We also demonstrated that addition of an Al2O3 passivation layer has no effect on the wave modes, but can increase the resonant frequencies. This paper provides a better understanding of the acoustic modes of Pt/LGS SAW devices, as well as useful guidance for device design. It is believed that the Rayleigh-type SAW and SH-type leaky waves are potentially useful for dual-mode sensing applications in harsh environments, to achieve multi-parameter monitoring or temperature-compensation on a single chip. Full article
(This article belongs to the Special Issue Applications of Ultrasonic Sensors)
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Open AccessArticle
Accuracy of Solid-State Residential Water Meters under Intermittent Flow Conditions
Sensors 2020, 20(18), 5339; https://doi.org/10.3390/s20185339 - 17 Sep 2020
Abstract
Accurate water consumption measurement of customers is a crucial component of water utility sustainability. During the last decade, sophisticated measuring technologies without moving components, known as solid-state water meters or static meters, have emerged. Solid-state water meters promise an improved accuracy with more [...] Read more.
Accurate water consumption measurement of customers is a crucial component of water utility sustainability. During the last decade, sophisticated measuring technologies without moving components, known as solid-state water meters or static meters, have emerged. Solid-state water meters promise an improved accuracy with more processing and transmission capabilities in comparison with traditional mechanical meters. A compromise needs to be reached between energy consumption and battery life as all these new features are extremely demanding on electric energy. The usual approach adopted by the manufacturer is to reduce the frequency with which static meters take measurements of the circulating flow. This reduction in signal sampling frequency can have a significant effect on the accuracy of the instruments when measuring water consumption events of 30 s or less, these events being common in residential customers. The research presented analyses of the metrological performance of 28 commercially available solid-state water meters from six different manufacturers in the presence of intermittent flows of various durations. The results show that the magnitude and dispersion of the error under intermittent flows is significantly larger in comparison to steady state flow conditions. The ultrasonic meters examined were more influenced by the intermittency than the electromagnetic meters. Full article
(This article belongs to the Special Issue Applications of Ultrasonic Sensors)
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