Magnetic nondestructive testing of rotor blade tips

Cardelli, E.; Faba, A.; Marsili, Roberto; Rossi, Gianluca; Tomassini, R.

doi:10.1063/1.4907180

Cited by 24 publications

(7 citation statements)

References 19 publications

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“…The research methodology and the related software were validated by experimenting with existing masonry structures, typical of many historical town centers, with the aim of comparing the results obtained with the methodology proposed here with others deriving from technologies and methods of proven validity [ 31 , 32 , 33 , 34 , 35 ]. The first test was carried out in the laboratory on specially-built masonry samples, and subsequently other tests were carried out in situ on existing historic masonry.…”

Section: Resultsmentioning

confidence: 99%

Image Analysis Technique for Material Behavior Evaluation in Civil Structures

et al. 2017

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The article presents a hybrid monitoring technique for the measurement of the deformation field. The goal is to obtain information about crack propagation in existing structures, for the purpose of monitoring their state of health. The measurement technique is based on the capture and analysis of a digital image set. Special markers were used on the surface of the structures that can be removed without damaging existing structures as the historical masonry. The digital image analysis was done using software specifically designed in Matlab to follow the tracking of the markers and determine the evolution of the deformation state. The method can be used in any type of structure but is particularly suitable when it is necessary not to damage the surface of structures. A series of experiments carried out on masonry walls of the Oliverian Museum (Pesaro, Italy) and Palazzo Silvi (Perugia, Italy) have allowed the validation of the procedure elaborated by comparing the results with those derived from traditional measuring techniques.

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Section: Resultsmentioning

confidence: 99%

Image Analysis Technique for Material Behavior Evaluation in Civil Structures

et al. 2017

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“…The verification of the coupling between sensors and wood was due to the lack of data in the literature, whereas these studies are of fundamental importance for the evaluation of the proposed applications [ 43 , 44 ]. Particular significance must be given in fact to the characteristics of the support and to the way in which the sensors are applied [ 45 ]. Furthermore, as they are applied by gluing, the measurements recorded could be affected by the characteristics of the adhesive, and given that wood is not a uniform material, and may have a rough surface, there is the risk of obtaining measurements of unsatisfactory precision.…”

Section: Introductionmentioning

confidence: 99%

Fibre Bragg Gratings for the Monitoring of Wooden Structures

2017

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The aim of this work was to develop and validate an experimental methodology suitable for analysing on-site the behaviour of fibre-reinforced wooden structures. The proposed measurement method is based on the application of fibre Bragg grating (FBG) strain sensors. An analysis of adhesive behaviour was performed preliminarily, which provided indications for choosing the type of adhesive and for the fibre bonding length in accordance with the volume of measurement. The first series of tests was carried out on wood samples to verify the coupling between the measuring sensor and the wood support when the latter is subject to mechanical stresses. The second investigation was done on site to test the behaviour of a historical wood floor before and after reinforcement by means of a series of tests performed using optical fibres with the Bragg grating. The optical fibre system measurements were compared to those obtained using a laser vibrometer, a measurement system of proven stability and precision. The comparison makes it possible to confirm the validity of the results and the reliability of the system for the monitoring of historic wooden structures.

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“…sensors, conductive ink, resistive polymers sensing elements or magnetoresistivity [15]. However, many metrological problems remain unresolved, due to non-linearity, material's rheological behaviour, mounting surface curvature and shape, dynamic characteristics, etc.…”

Section: Introductionmentioning

confidence: 99%

A new system for the measurement of gripping force based on scattering

et al. 2017

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The measurement of contact pressure of human fingers is very important to understand human perceptual mechanisms, that is the main goal of most of the neuroscientific studies. It may also lead to a correct development of tactile devices and haptic systems, as they are intended to convey controllable and effective stimuli.<span style="font-family: 'Garamond','serif'; font-size: 10pt; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-GB">In this work, an optical measurement system based on Frustrated Total Internal Reflection (FTIR) is proposed for the measurement of the pressure distribution on the contact area between a human finger and a flat surface. The feasibility study performed shows that the tested sensor can be effectively used for the measurement of the fingertip contact pressure both on static and dynamic conditions.

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Magnetic nondestructive testing of rotor blade tips

Cited by 24 publications

References 19 publications

Image Analysis Technique for Material Behavior Evaluation in Civil Structures

Image Analysis Technique for Material Behavior Evaluation in Civil Structures

Fibre Bragg Gratings for the Monitoring of Wooden Structures

A new system for the measurement of gripping force based on scattering

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