Application of a single-board computer as a low-cost pulse generator

Fedrizzi, Marcus Kristian; Soria, Julio

doi:10.1088/0957-0233/26/9/095302

Cited by 21 publications

(10 citation statements)

References 3 publications

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“…The arrangement ensured that each of the two cameras could see the laser light corresponding to a particular polarization only. The timing was synchronized by programming the BBB (Beagel Bone Black) controller (Fedrizzi and Soria (2015)) which provided the platform to specify a user-selectable time-shift, ∆t, between the two PIV systems. Multi-grid cross-correlation algorithm proposed by Soria (1996) was used for the processing of images.…”

Section: Experimental Measurementsmentioning

confidence: 99%

Investigation of the shear-layer instabilities in supersonic impinging jets using dual-time velocity measurements

Sikroria¹,

Soria²,

Karami³

et al. 2021

ISPIV21

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Motivated by applications in the propulsion industry, the fundamental study of phase-locked shear-layer instabilities in supersonic impinging jets has been of research interest for long time. While such flows have been experimentally investigated in various research studies using time-unresolved particle image velocimetry (PIV) techniques, the understanding of the shear-layer dynamics is limited, due to the absence of temporal information. Time-resolved PIV measurements for high-speed flows require a large bandwidth, which is challenging to achieve with the current state of technology. An alternate approach using time-unresolved double-PIV measurements is presented in the current study, which provides multiple samples of dual-time data, depicted in figure 1. Such data can be obtained using two co-visual PIV systems, triggered at a user-selectable time-offset, ∆t. As shown by Sikroria et al. (2020), the application of techniques like dynamic mode decomposition (DMD) on time-unresolved dual-time data provides valuable information about the flow structures governing the shear-layer instabilities. The experimental setup for such measurements in supersonic impinging jets, followed by the determination of the relevant dynamical flow structures from the data, will be presented in the conference.

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Section: Experimental Measurementsmentioning

confidence: 99%

Investigation of the shear-layer instabilities in supersonic impinging jets using dual-time velocity measurements

Sikroria¹,

Soria²,

Karami³

et al. 2021

ISPIV21

Self Cite

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“…The 2C-2D µ-PIV experimental set-up consists of: (i ) a pulsed LED light source to illuminate the flow field, (ii ) a microscope objective with 40x magnification and the optical sub-systems (lens, mirror, etc.) to focus the nematode along with the flow tracer particles, (iii ) a digital 5 MPx sCMOS camera to acquire the single-exposed images, (iv ) a Beagle Bone Black programmable real-time controller [Fedrizzi and Soria, 2015] used to synchronised the sCMOS exposure with the pulsed LED light source and (v ) a fluid chamber. Figure 1 shows the schematic representation of the experimental set-up and the apparatus used, which was fixed on an optical table.…”

Section: C-2d µ-Piv Systemmentioning

confidence: 99%

Experimental investigation using micro-PIV of the effect of microRNA-1 deficiency on motility inCaenorhabditis elegans

Ravikumar

Fedrizzi

Prabhakar

et al. 2020

Preprint

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Caenorhabditis elegans is a microscopic nematode used extensively as a model organism in studies of neuromuscular function and neurodegenerative disorders. A mutation in mir-1 affects signalling at the neuromuscular junction. We investigate the effect of this mutation on the propulsive power exerted by nematodes as they grow in size with age. We compare the motility of wild-type and mir-1(gk276) mutant nematodes in a Newtonian fluid using a two-component, two dimensional (2C-2D) Digital Microscopic Particle Image Velocimetry (µ-PIV) technique. Beating amplitudes of the head and tail, the wavelength of undulatory waves and the swimming speed scale linearly with size in both the wild-type and mutant strains. The beating frequency is independent of size or position along the body. Differences in the magnitudes of these kinematic parameters between the two strains, however, grow systematically with age. The swimming speed scales linearly with the wave speed of the neuromuscular undulation in both nematode strains with a conserved ratio. The magnitude of mean power and mean local fluid circulation in the mutant is significantly lower compared to those of the wild-type animals of the same age. This indicates that a mutation in mir-1 adversely affects motility in C. elegans.

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“…[15]) or BeableBone Black (e.g. [16]). In the field of seismology, Saraò et al [17] have developed a low-cost Arduino based seismometer for educational purposes, although the sampling rate of the recorded signals is not constant and the units of the amplitude are not calibrated.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Design and test of Geophonino-3D: A low-cost three-component seismic noise recorder for the application of the H/V method

Soler-Llorens

Galiana-Merino

Giner-Caturla

et al. 2018

Sensors and Actuators A: Physical

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Application of a single-board computer as a low-cost pulse generator

Cited by 21 publications

References 3 publications

Investigation of the shear-layer instabilities in supersonic impinging jets using dual-time velocity measurements

Investigation of the shear-layer instabilities in supersonic impinging jets using dual-time velocity measurements

Experimental investigation using micro-PIV of the effect of microRNA-1 deficiency on motility inCaenorhabditis elegans

Design and test of Geophonino-3D: A low-cost three-component seismic noise recorder for the application of the H/V method

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