Measurement of three-dimensional velocity profiles using forward-scattering particle image velocimetry (FSPIV) and neural net pattern recognition

Benjie Ovryn, Ted Wright, John D. Khaydarov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Citations (Scopus)

Abstract

We employ Forward Scattering Particle Image Velocimetry (FSPIV) to measure all three components of the velocity of a buoyant polystyrene particle in oil. Unlike conventional particle image velocimetry (PIV) techniques, FSPIV employs coherent or partially coherent back illumination and collects the forward scattered wavefront; additionally, our field-of-view is microscopic. Using FSPIV, it is possible to easily identify the particle's centroid and to simultaneously obtain the fluid velocity in different planes perpendicular to the viewing direction without changing the collection or imaging optics. We have trained a neural network to identify the scattering pattern as function of displacement along the optical axis (axial defocus) and determine the transverse velocity by tracking the centroid as function of time. We present preliminary results from Mie theory calculations which include the effect of the imaging system. To our knowledge, this is the first work of this kind; preliminary results are encouraging.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsSoyoung S. Cha, James D. Trolinger
Pages112-123
Number of pages12
Volume2546
StatePublished - 1995
Externally publishedYes
EventOptical Techniques in Fluid, Thermal, and Combustion Flow - San Diego, CA, USA
Duration: Jul 10 1995Jul 13 1995

Other

OtherOptical Techniques in Fluid, Thermal, and Combustion Flow
CitySan Diego, CA, USA
Period7/10/957/13/95

Fingerprint

neural nets
Forward scattering
forward scattering
particle image velocimetry
pattern recognition
Velocity measurement
Pattern recognition
velocity distribution
Neural networks
centroids
Mie scattering
Wavefronts
Imaging systems
field of view
Optics
Polystyrenes
polystyrene
oils
Lighting
illumination

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Ovryn, B., Wright, T., & Khaydarov, J. D. (1995). Measurement of three-dimensional velocity profiles using forward-scattering particle image velocimetry (FSPIV) and neural net pattern recognition. In S. S. Cha, & J. D. Trolinger (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 2546, pp. 112-123)

Measurement of three-dimensional velocity profiles using forward-scattering particle image velocimetry (FSPIV) and neural net pattern recognition. / Ovryn, Benjie; Wright, Ted; Khaydarov, John D.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / Soyoung S. Cha; James D. Trolinger. Vol. 2546 1995. p. 112-123.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ovryn, B, Wright, T & Khaydarov, JD 1995, Measurement of three-dimensional velocity profiles using forward-scattering particle image velocimetry (FSPIV) and neural net pattern recognition. in SS Cha & JD Trolinger (eds), Proceedings of SPIE - The International Society for Optical Engineering. vol. 2546, pp. 112-123, Optical Techniques in Fluid, Thermal, and Combustion Flow, San Diego, CA, USA, 7/10/95.
Ovryn B, Wright T, Khaydarov JD. Measurement of three-dimensional velocity profiles using forward-scattering particle image velocimetry (FSPIV) and neural net pattern recognition. In Cha SS, Trolinger JD, editors, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 2546. 1995. p. 112-123
Ovryn, Benjie ; Wright, Ted ; Khaydarov, John D. / Measurement of three-dimensional velocity profiles using forward-scattering particle image velocimetry (FSPIV) and neural net pattern recognition. Proceedings of SPIE - The International Society for Optical Engineering. editor / Soyoung S. Cha ; James D. Trolinger. Vol. 2546 1995. pp. 112-123
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