Broadband Air-Coupled Ultrasound Emitter and Receiver Enable Simultaneous Measurement of Thickness and Speed of Sound in Solids [PDF]
Sensors, 2023 Air-coupled ultrasound sensors have advantages over contact ultrasound sensors when a sample should not become contaminated or influenced by the couplant or the measurement has to be a fast and automated inline process.
Klaas Bente +4 more
doaj +4 more sources
Noncontact Damage Topography Reconstruction by Wavenumber Domain Analysis Based on Air-Coupled Ultrasound and Full-Field Laser Vibrometer [PDF]
Sensors, 2021 Noncontact ultrasonic detection technology is an effective method to detect damage in time. This paper proposes a noncontact damage detection system based on air-coupled ultrasound and full-field laser vibrometer, which realizes the excitation of ...
Hui Zhang +3 more
doaj +4 more sources
Slight crack identification of cottonseed using air-coupled ultrasound with sound to image encoding [PDF]
Frontiers in Plant Science, 2022 Slight crack of cottonseed is a critical factor influencing the germination rate of cotton due to foamed acid or water entering cottonseed through testa.
Chi Zhang +7 more
doaj +4 more sources
Air-coupled ultrasound detection using capillary-based optical ring resonators [PDF]
Scientific Reports, 2017 We experimentally demonstrate and theoretically analyze high Q-factor (~107) capillary-based optical ring resonators for non-contact detection of air-coupled ultrasound. Noise equivalent pressures in air as low as 215 mPa/√Hz and 41 mPa/√Hz at 50 kHz and
Kyu Hyun Kim +6 more
doaj +2 more sources
Intelligent Optimization Design of a Phononic Crystal Air-Coupled Ultrasound Transducer. [PDF]
Materials (Basel), 2023 To further improve the operational performance of a phononic crystal air-coupled ultrasonic transducer while reducing the number of simulations, an intelligent optimization design strategy is proposed by combining finite element simulation analysis and artificial intelligence (AI) methods. In the proposed strategy, the structural design parameters of 1–
Wang J +6 more
europepmc +3 more sources
Air-Coupled Ultrasound Sealing Integrity Inspection Using Leaky Lamb Waves in a Simplified Model of a Lithium-Ion Pouch Battery: Feasibility Study [PDF]
Sensors, 2022 Inspecting the sealing integrity of lead tabs is an important means of ensuring the reliability and safety of pouch-type lithium-ion (Li-ion) batteries with a thin multi-layered aluminum (Al) laminated film.
Hyunwoo Cho +5 more
doaj +2 more sources
Development of Ultrasound Focusing Discrete Array for Air-Coupled Ultrasound Generation
Physics Procedia, 2010 AbstractThe technique and results of synthesis of ultrasound focusing discrete arrays for air-coupled ultrasound generation are presented. One of the arrays is an antenna 22 cm in diameter. It consists of 60 transmitters of Murata Company. The resonant frequency of each transmitter is 40 kHz, diameter is 16 mm.
Korobov, Alexander I. +2 more
exaly +2 more sources
Guest Editorial: Special Section on Air-Coupled Ultrasound
IEEE Open Journal of Ultrasonics, Ferroelectrics, and Frequency ControlAir-coupled Ultrasound is a challenging field dominated by the drastic impedance mismatch between air and all condensed matter, the low ultrasound velocity in the air, and the rapidly increasing attenuation with frequency.
Mate Gaal, Tomas Gomez Alvarez-Arenas
doaj +3 more sources
Ultrasonics Sonochemistry, 2021 This study aimed at investigating the performances of air drying of blackberries assisted by airborne ultrasound and contact ultrasound. The drying experiments were conducted in a self-designed dryer coupled with a 20-kHz ultrasound probe.
Yang Tao +7 more
doaj +1 more source
Foods, 2021 The conditions of convective drying induce a negative effect on the quality of the dried products, and thus, innovative solutions, such as the utilization of ultrasound and dehumidified air are gaining importance.
Aleksandra Matys +3 more
doaj +1 more source