Results 11 to 20 of about 11,815 (201)
Sensors, 2021 Piezoelectric sensors can be embedded in carbon fibre-reinforced plastics (CFRP) for continuous measurement of acoustic emissions (AE) without the sensor being exposed or disrupting hydro- or aerodynamics.
Arnaud Huijer +2 more
doaj +1 more source
Monolithic ultrasound fingerprint sensor. [PDF]
, 2017 This paper presents a 591×438-DPI ultrasonic fingerprint sensor. The sensor is based on a piezoelectric micromachined ultrasonic transducer (PMUT) array that is bonded at wafer-level to complementary metal oxide semiconductor (CMOS) signal processing ...
Boser, Bernhard E +7 more
core +1 more source
Adhesive disbond detection using piezoelectric wafer active sensors [PDF]
SPIE Proceedings, 2015 The aerospace industry continues to increase the use of adhesives for structural bonding due to the increased joint efficiency (reduced weight), even distribution of the load path and decreases in stress concentrations. However, the limited techniques for verifying the strength of adhesive bonds has reduced its use on primary structures and requires an
William Roth, Victor Giurgiutiu
openaire +1 more source
Vibration-Based In-Situ Detection and Quantification of Delamination in Composite Plates
Sensors, 2019 This paper presents a new methodology for detecting and quantifying delamination in composite plates based on the high-frequency local vibration under the excitation of piezoelectric wafer active sensors. Finite-element-method-based numerical simulations
Hanfei Mei +5 more
doaj +1 more source
Applied Sciences, 2022 The acoustic emission (AE) technique has become a well-established method of monitoring structural health over recent years. The sensing and analysis of elastic AE waves, which have involved piezoelectric wafer active sensors (PWAS) and time domain and ...
Joseph Chandler Garrett +2 more
doaj +1 more source
Piezoelectric wafer active sensor embedded ultrasonics in beams and plates [PDF]
Experimental Mechanics, 2003 In this paper we present the results of a systematic theoretical and experimental investigation of the fundamental aspects of using piezoelectric wafe active sensors (PWASs) to achieve embedded ultrasonics in thin-gage beam and plate structures. This investigation opens the path for systematic application of PWASs forin situ health monitoring.
Giurgiutiu, Victor, Bao, Jack, Zhao, W
openaire +1 more source
Ultrasonic Guided Waves for Liquid Water Localization in Fuel Cells: An Ex Situ Proof of Principle
Sensors, 2022 Water management is a key issue in the design and operation of proton exchange membrane fuel cells (PEMFCs). For an efficient and stable operation, the accumulation of liquid water inside the flow channels has to be prevented.
Jakob Sablowski +2 more
doaj +1 more source
Ultrasonic Guided Wave Testing on Cross-Ply Composite Laminate: An Empirical Study
Sensors, 2020 Structural health monitoring comprises a set of techniques to detect defects appearing in structures. One of the most viable techniques is based on the guided ultrasonic wave test (UGWT), which consists of emitting waves throughout the structure ...
Gerardo Aranguren +4 more
doaj +1 more source
Sensors, 2021 Acoustic waves are widely used in structural health monitoring (SHM) for detecting fatigue cracking. The strain energy released when a fatigue crack advances has the effect of exciting acoustic waves, which travel through the structures and are picked up
Roshan Joseph +3 more
doaj +1 more source
Multifunctional Flexible PVDF-TrFE/BaTiO3 Based Tactile Sensor for Touch and Temperature Monitoring [PDF]
, 2017 This paper presents an enhanced piezoelectricity based sensor for touch and temperature sensing. The sensor is realized over flexible polyimide film, making it suitable for application like e-skin.
Dahiya, Ravinder +2 more
core +1 more source