Circular membrane approximation model with the effect of the finiteness of the electrode’s diameter of MEMS capacitive micromachined ultrasonic transducers
Sign Up to like & getrecommendations! Published in 2017 at "Microsystem Technologies"
DOI: 10.1007/s00542-016-3184-9
Abstract: In this paper, an analytical model for evaluation of membrane displacement, multiple resonances, mechanical impedances and bandwidth profile of capacitive micromachined ultrasonic transducers (CMUTs) developed by MEMS technology for medical imaging is presented. Improvement in… read more here.
Keywords: finiteness; model; membrane; micromachined ultrasonic ... See more keywords
Cement/epoxy-based embedded ultrasonic transducers for concrete structure applications
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Materials Research and Technology"
DOI: 10.1016/j.jmrt.2021.06.067
Abstract: Abstract Embedded ultrasonic technology has the potential for a wide range of applications in structural health monitoring. In this study, embedded ultrasonic transducers were prepared with cement powder/epoxy resin composites as the matrix of each… read more here.
Keywords: embedded ultrasonic; transducer; layer; epoxy based ... See more keywords
Research and validation of design principles for PVDF wideband ultrasonic transducers based on an equivalent circuit model
Sign Up to like & getrecommendations! Published in 2019 at "Measurement"
DOI: 10.1016/j.measurement.2019.04.050
Abstract: Abstract With the increasing use of ultrasonic measurement technology in many fields, the demand for the wideband ultrasonic transducers is also growing. In order to design a wideband piezoelectric ultrasonic transducer, the design principles of… read more here.
Keywords: ultrasonic transducer; model; ultrasonic transducers; piezoelectric ultrasonic ... See more keywords
Potassium Sodium Niobate-Based Lead-Free High-Frequency Ultrasonic Transducers for Multifunctional Acoustic Tweezers.
Sign Up to like & getrecommendations! Published in 2022 at "ACS applied materials & interfaces"
DOI: 10.1021/acsami.2c05687
Abstract: Ultrasonic transducers may need to operate in direct contact with the human body, especially with the skin or closer to blood vessels. Eco-friendly lead-free materials and devices are therefore being vigorously developed for biosafety considerations.… read more here.
Keywords: high frequency; lead free; frequency; ultrasonic transducers ... See more keywords
The electro-mechanical behaviour of flexural ultrasonic transducers
Sign Up to like & getrecommendations! Published in 2017 at "Applied Physics Letters"
DOI: 10.1063/1.4984239
Abstract: Flexural ultrasonic transducers are capable of high electro-mechanical coupling efficiencies for the generation or detection of ultrasound in fluids. They are the most common type of ultrasonic sensor, commonly used in parking sensors, because the… read more here.
Keywords: behaviour flexural; flexural ultrasonic; electro mechanical; mechanical behaviour ... See more keywords
Acoustic metasurfaces for efficient matching of non-contact ultrasonic transducers
Sign Up to like & getrecommendations! Published in 2021 at "Smart Materials and Structures"
DOI: 10.1088/1361-665x/ac085a
Abstract: Air-coupled ultrasonic techniques based on rapid and contactless inspection are useful for various applications, such as ranging finding, surface profile measurement, and non-destructive evaluation. However, impedance matching issues between air and piezoelectric materials lead to… read more here.
Keywords: metasurfaces efficient; acoustic metasurfaces; ultrasonic transducers; matching non ... See more keywords
Frequency Tuning Technique of Piezoelectric Ultrasonic Transducers for Ranging Applications
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Microelectromechanical Systems"
DOI: 10.1109/jmems.2018.2831638
Abstract: This paper presents a novel low-cost technique for the frequency tuning of piezoelectric micromachined ultrasonic transducers (PMUT). PMUT devices are fabricated using the PiezoMUMPs technology with resonance frequencies of the first and second modes at… read more here.
Keywords: technique piezoelectric; tuning technique; frequency; ultrasonic transducers ... See more keywords
A Novel Topology for Process Variation-Tolerant Piezoelectric Micromachined Ultrasonic Transducers
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Microelectromechanical Systems"
DOI: 10.1109/jmems.2018.2876384
Abstract: This paper presents a novel architecture for piezoelectric micromachined ultrasonic transducers (PMUT) allowing for a drastic reduction in the impact of process variations on the accuracy of the resonant frequency. At the core of this… read more here.
Keywords: piezoelectric micromachined; topology; process; micromachined ultrasonic ... See more keywords
Piezoelectric Micromachined Ultrasonic Transducers With Pinned Boundary Structure
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Microelectromechanical Systems"
DOI: 10.1109/jmems.2020.3001560
Abstract: This paper reports the approach to boost the acoustic performances of PMUTs (Piezoelectric Micromachined Ultrasonic Transducers) including vibrational amplitude, acoustic pressure and electromechanical coupling by using the pinning boundary structure. An analytical model is developed… read more here.
Keywords: boundary structure; piezoelectric micromachined; micromachined ultrasonic; ultrasonic transducers ... See more keywords
Additive Manufacturing (AM) Capacitive Acoustic and Ultrasonic Transducers Using a Commercial Direct Light Processing (DLP) Printer
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Sensors Journal"
DOI: 10.1109/jsen.2019.2950089
Abstract: In recent years, there has been increasing interest in using additive manufacturing (3D printing) technology to fabricate sensors and actuators due to rapid prototyping, low-cost manufacturing processes, customized features and the ability to create complex… read more here.
Keywords: capacitive acoustic; ultrasonic transducers; using commercial; additive manufacturing ... See more keywords
Venting in the Comparative Study of Flexural Ultrasonic Transducers to Improve Resilience at Elevated Environmental Pressure Levels
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Sensors Journal"
DOI: 10.1109/jsen.2020.2974547
Abstract: The classical form of a flexural ultrasonic transducer is a piezoelectric ceramic disc bonded to a circular metallic membrane. This ceramic induces vibration modes of the membrane for the generation and detection of ultrasound. The… read more here.
Keywords: transducer; pressure levels; flexural ultrasonic; ultrasonic transducers ... See more keywords