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Authors: Sergio L. Carrasco-Ortiz ; Eduardo Valero ; Maria Morant and Roberto Llorente

Affiliation: Universitat Politècnica de València, Spain

ISBN: 978-989-758-286-8

Keyword(s): Computational Sensing, Photonic Sensor, Imaging, CMOS, Multiphase Water Flow, Cavitation, Air Fraction, Bubble Speed.

Related Ontology Subjects/Areas/Topics: Computational Optical Sensing and Imaging ; Optical Instrumentation ; Optics ; Photonics, Optics and Laser Technology

Abstract: This paper presents and demonstrates experimentally a photonic sensor based on laser excitation and CMOS array detection of light interactions in a bubbling water column. Bubbling water columns are multiphase water flows, which can be produced by cavitation effect in screws and pump-jets, or by water-air mixing in the dam intakes and spillways in hydroelectric energy generation plants. The proposed optical sensor comprises a CMOS array with a polymeric tuneable optical lens sampling the area illuminated by a diode laser operating at 532 nm. By computational imaging, the sensor is able to measure the size, shape and speed of the bubbles inside the water column and the corresponding bubble concentration. The developed laser-assisted sensor is demonstrated experimentally in the laboratory with a water column at 0.05 MPa with good results employing Optical Flow, SIFT and SURF computational methods.

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Paper citation in several formats:
Carrasco-Ortiz, S.; Valero, E.; Morant, M. and Llorente, R. (2018). Photonic Sensing and Characterisation of Multiphase Water Flows - Computational Sensing and Imaging.In Proceedings of the 6th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS, ISBN 978-989-758-286-8, pages 55-62. DOI: 10.5220/0006553100550062

@conference{photoptics18,
author={Sergio L. Carrasco{-}Ortiz. and Eduardo Valero. and Maria Morant. and Roberto Llorente.},
title={Photonic Sensing and Characterisation of Multiphase Water Flows - Computational Sensing and Imaging},
booktitle={Proceedings of the 6th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS,},
year={2018},
pages={55-62},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0006553100550062},
isbn={978-989-758-286-8},
}

TY - CONF

JO - Proceedings of the 6th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS,
TI - Photonic Sensing and Characterisation of Multiphase Water Flows - Computational Sensing and Imaging
SN - 978-989-758-286-8
AU - Carrasco-Ortiz, S.
AU - Valero, E.
AU - Morant, M.
AU - Llorente, R.
PY - 2018
SP - 55
EP - 62
DO - 10.5220/0006553100550062

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