Results 21 to 30 of about 4,479,393 (285)
An Integrated Front-end Circuit Board for Air-Coupled CMUT Burst-Echo Imaging
Sensors, 2020 To conduct burst-echo imaging with air-coupled capacitive micromachined ultrasonic transducers (CMUTs) using the same elements in transmission and reception, this work proposes a dedicated and integrated front-end circuit board design to build an imaging
Lei Ye +4 more
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Optoacoustic imaging with an air-coupled transducer using coaxially aligned focused illumination
AIP Advances, 2022 Optoacoustic (OA) methods have become powerful tools in biomedical research capable of retrieving functional information from biological tissues in vivo. Acquisition of OA signals generally relies on direct physical contact of a transducer or an acoustic
Cagla Özsoy +5 more
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A noncontact ultrasonic platform for structural inspection [PDF]
, 2011 Miniature robotic vehicles are receiving increasing attention for use in nondestructive testing (NDE) due to their attractiveness in terms of cost, safety, and their accessibility to areas where manual inspection is not practical. Conventional ultrasonic
Summan, Rahul +4 more
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MATEC Web of Conferences, 2018 In the aerospace industry contactless measurement has been a very versatile and adaptable in recent years, mainly because of its diverse applications. Usually ultrasonic measurement requires acoustic contact media which may disserve the sample and varies
Vyas Jaishree, Kažys Rymantas Jonas
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Phased-Array Approach to Air-coupled Ultrasound with Resonant Defect Excitation
Research and Review Journal of Nondestructive Testing, 2023 Wave propagation in air-coupled ultrasound (ACUT) is slower compared to ultrasound in immersion technique. Due to the lower velocity of sound the maximum pulse repetition rate is five times smaller than in water coupled ultrasound.
Timo Reindl +3 more
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An Airborne Sonar System for Underwater Remote Sensing and Imaging
IEEE Access, 2020 High-resolution imaging and mapping of the ocean and its floor has been limited to less than 5% of the global waters due to technological barriers. Whereas sonar is the primary contributor to existing underwater imagery, the water-based system is limited
Aidan Fitzpatrick +2 more
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Air-Coupled and Resonant Pulse-Echo Ultrasonic Technique
Sensors, 2019 An ultrasonic, resonant, pulse-echo, and air-coupled nondestructive testing (NDT) technique is presented. It is intended for components, with regular geometries where it is possible to excite resonant modes, made of materials that have a high acoustic ...
Tomás Gómez Álvarez-Arenas +1 more
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Applied Sciences, 2020 The objective of this study is to compare the performance of different ultrasonic non-destructive testing (NDT) techniques for bonding quality evaluation.
Bengisu Yilmaz +3 more
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Ultrasonic Lateral Displacement Sensor for Health Monitoring in Seismically Isolated Buildings
Sensors, 2015 An ultrasonic lateral displacement sensor utilizing air-coupled ultrasound transducers is proposed. The normally-distributed far field of an ultrasound transducer in a lateral direction is taken advantage of for measuring lateral displacement.
Iwao Matsuya +2 more
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Ferroelectret Ultrasonic Transducers for Pulse-Echo Water Immersion
Applied Sciences, 2020 Ferroelectrets are thin and porous polymeric films with a cellular microstructure, high porosity, permanent polarization and piezoelectric response.
Julio Quirce +3 more
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