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van Neer, P. (author), Volker, A. (author), Berkhoff, A. (author), Schrama, T. (author), Akkerman, H. (author), van Breemen, A. (author), Peeters, L. (author), van der Steen, J.L. (author), Gelinck, G.H. (author)
Ultrasound based mid-air haptic feedback devices can produce tactile sensations at any time and position without restricting human motion. This is useful for augmented and virtual reality, feedback buttons and virtual user interfaces. The haptic feedback mechanism is caused by acoustic radiation force and streaming. Typical solutions to induce...
conference paper 2020
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Peters, L.C.J.M. (author), Ollearo, R. (author), Verbeek, R.G.F.A. (author), van der Steen, J.L.P.J. (author), Akkerman, H.B. (author), Volker, A.W.F. (author), van Neer, P.L.M.J. (author), Gelinck, G.H. (author)
Large-area flexible ultrasound arrays can offer new ultrasound modalities in multiple fields. The production of these arrays when using CMOS-type fabrication techniques faces scalability challenges and costs increase dramatically when upscaled to large dimensions. We investigate the monolithic production of large-area PPT (Printed Polymer...
conference paper 2019
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Saeed, A. (author), Volker, A.W.F. (author), Martina, Q. (author), Alalouni, A. (author)
Scale and corrosion affect the production certainty of oil and gas well. Scale build-up reduces flow and ultimately could shut down production when it block to tubing completely. Corrosion of the tubing wall occurs very often simultaneously with scale build-up and affects the integrity of the tubing wall. Vital information about the integrity is...
conference paper 2019
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Volker, A.W.F. (author)
There are many applications where access is limited to the location where the inspection is needed. One very important application is pipe support corrosion. TNO worked on guided wave tomography for mapping wall loss under pipe supports. Due to the nature of this type of corrosion, pitting may occur. The detection and sizing of these small pits...
conference paper 2019
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Ruiz, P. (author), Nijs, W. (author), Tarvydas, D. (author), Sgobbi, A. (author), Zucker, A. (author), Pilli, R. (author), Jonsson, R. (author), Camia, A. (author), Thiel, C. (author), Hoyer-Klick, C. (author), Dalla Longa, F. (author), Kober, T. (author), Badger, J. (author), Volker, P. (author), Elbersen, B.S. (author), Brosowski, A. (author), Thrän, D. (author)
Data on the potential generation of energy from wind, solar and biomass is crucial for analysing their development, as it sets the limits on how much additional capacity it is feasible to install. This paper presents the methodologies used for the development of ENSPRESO, ENergy System Potentials for Renewable Energy SOurces, an EU-28 wide, open...
article 2019
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Selvam, S. (author), Volker, A. (author), van Neer, P.L.M.J. (author), Verweij, M.D. (author)
conference paper 2018
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van Neer, P.L.M.J. (author), Volker, A.W.F. (author), Berkhoff, A.P. (author), Akkerman, H.B. (author), Schrama, T. (author), van Breemen, A. (author), Gelinck, G.H. (author)
Recently, there has been considerable interest in the development of ultrasound based mid-air haptic feedback devices. These devices allow for tactile sensations to be induced at any position and time without constraints to human motion, which is useful for virtual user interfaces, augmented/virtual reality and feedback buttons. The haptic...
conference paper 2018
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Volker, A.W.F. (author)
Guided wave tomography is an advanced technology for quantitative wall thickness mapping to image wall loss due to corrosion or erosion. An inversion approach is used to match the measured phase (time) at a specific frequency to a model. The accuracy of the model determines the sizing accuracy. Particularly for seam welded pipes there is a...
conference paper 2018
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van Groenestijn, G.J. (author), Meulendijks, N. (author), van Ee, R. (author), Volker, A. (author), van Neer, P.L.M.J. (author), Buskens, P. (author), Julien, C. (author), Verheijen, M. (author)
article 2018
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van den Berg, F.D. (author), Kok, P.J.J. (author), Yang, H. (author), Aarnts, M.P. (author), Meilland, P. (author), Kebe, T. (author), Stolzenberg, M. (author), Krix, D. (author), Zhu, W. (author), Peyton, A.J. (author), Martinez-De-Guerenu, A. (author), Gutierrez, I. (author), Jorge-Badiola, D. (author), Malmström, M. (author), Volker, A.W.F. (author), Duijster, A.J. (author), Wirdelius, H. (author), Boström, A. (author), Mocci, C. (author), Vannucci, M. (author), Colla, V. (author), Davis, C. (author), Zhou, L. (author), Schmidt, R. (author), Labbé, S. (author), Reboud, C. (author), Skarlatos, A. (author), Leconte, V. (author), Lombard, P. (author)
In steel manufacturing, the conventional method to determine the mechanical properties and microstructure is by offline, destructive (lab-)characterisation of sample material that is typically taken from the head or the tail of the coil. Since coils can be up to 7 km long, the samples are not always representative for the main coil body. Also,...
conference paper 2018
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van Groenestijn, G.J. (author), Meulendijks, N. (author), van Ee, R. (author), Volker, A.W.F. (author), van Neer, P.L.M.J. (author), Buskens, P. (author), Julien, C. (author), Verheijen, M. (author)
Both in design and production of nanoparticles and nanocomposites it is of vital importance to have information about their size and concentration. During the formation of nanoparticles, real-time monitoring of particle size and concentration during bottom-up synthesis in liquids allows for a detailed study of nucleation and growth. This...
article 2018
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Duijster, A.J. (author), van Groenestijn, G.J. (author), van Neer, P.L.M.J. (author), Blacquière, G. (author), Volker, A.W.F. (author)
The use of phased arrays is growing in the non-destructive testing industry and the trend is towards large 2D arrays, but due to limitations, it is currently not possible to record the signals from all elements, resulting in aliased data. In the past, we have presented a data interpolation scheme 'beyond spatial aliasing' to overcome this...
conference paper 2018
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Demčenko, A. (author), Wilson, R. (author), Cooper, J.M. (author), Mazilu, M. (author), Volker, A.W.F. (author)
This paper shows that acoustoelasticity in one-dimensional (1D) multilayered isotropic hyperelastic materials can be understood through the analysis of elastic wave velocities as a function of applied stress. This theoretical framework is used for eigenvalue analyses in stressed elastic structures through a reformulation of the stiffness matrix...
article 2018
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van Groenestijn, G.J.A. (author), Meulendiiks, N.M.M. (author), Volker, A.W.F. (author), van Neer, P.L.M.J. (author), Buskens, P.J.P. (author)
Nanoparticles are applied in an increasing number of products (e.g. medicine, food and cosmetics). There is a need to real-time monitor the growth of nanoparticles during production inside the chemical reactor. However, standard particle sizing methods such as dynamic light scattering (DLS) and transmission electron microscopy (TEM) cannot do...
conference paper 2018
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Volker, A.W.F. (author), van Neer, P.L.M.J. (author)
Proper spatial sampling is critical for many applications. If the sampling criterion is not met, artifacts appear for example in images. Last year an iterative approach was presented using wave field extrapolation to interpolate spatially aliased signals. The main idea behind this approach is that after inverse wave field extrapolation the...
conference paper 2017
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van Neer, P.L.M.J. (author), Vos, H.J. (author), Volker, A.F.W. (author)
conference paper 2017
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Volker, A.W.F. (author), Brandenburg, M. (author)
Corrosion is one of the industries major issues regarding the integrity of assets. Currently inspections are conducted at regular intervals to ensure a sufficient integrity level of these assets. There are many situations where the actual defect location is not accessible, e.g., a pipe support or a partially buried pipe. Last year an approach...
conference paper 2017
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Volker, A.W.F. (author), van Neer, P.L.M.J. (author)
A sufficiently high spatial sampling is critical for high quality imaging. If the sampling criterion is not met, artifacts appear in the image generally referred to as grating lobes. Probes with a large aperture provide a large field of view, which allows for more efficient inspection. On the other hand this leads to an increase in the number of...
conference paper 2016
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van Neer, P.L.M.J. (author), Vos, H.J. (author), Volker, A.F.W. (author)
Proper spatial sampling is critical for high quality imaging. If the sampling criterion is not met, grating lobe artifacts appear in the image. In non-destructive testing applications efficiency is being increased by the steady enlargement of the field of view, resulting in more elements and thus a higher transducer complexity and cost. In the...
conference paper 2016
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Volker, A.W.F. (author), van Zon, A.T. (author), Hsu, Z.C. (author), van den Boogert, L. (author)
Corrosion is one of the industries major issues regarding the integrity of assets. Currently inspections are conducted at regular intervals to ensure a sufficient integrity level of these assets. Cost reduction while maintaining a high level of reliability and safety of installations is a major challenge. There are many situations where the...
conference paper 2016
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