A Sterescopic System to Measure Water Waves in Laboratories

A Sterescopic System to Measure Water Waves in Laboratories

A new system for estimating the synthetic parameters of sea states during physical investigations has been implemented. The technique proposed herein is based on stereographic analysis of digital images acquired with optical sensors. A series of ad hoc floating markers has been made and properly moo...

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Bibliographic Details
Published in:Remote sensing (Basel, Switzerland) Vol. 12; no. 14; p. 2288
Main Authors: Molfetta, Matteo Gianluca, Bruno, Maria Francesca, Pratola, Luigi, Rinaldi, Antonio, Morea, Alberto, Preziosa, Giovanni, Pasquali, Davide, Di Risio, Marcello, Mossa, Michele
Format: Journal Article
Language:English
Published: Basel MDPI AG 01-07-2020
Subjects:
Additives
Algorithms
Calibration
Digital imaging
Elevation
Image acquisition
Laboratories
Markers
Optical measuring instruments
Parameter estimation
physical models
Reliability analysis
Remote sensing
Sea states
Sensors
stereographics
Stereoscopy
Time series
Water waves
Wave height
wave measurement
Wave tanks
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Summary:A new system for estimating the synthetic parameters of sea states during physical investigations has been implemented. The technique proposed herein is based on stereographic analysis of digital images acquired with optical sensors. A series of ad hoc floating markers has been made and properly moored to the bottom of a large wave tank to estimate the synthetic parameters of generated waves. The implemented acquisition system and the proposed algorithm provide automatic recognition of all markers by a pair of optical sensors that synchronously captures their instantaneous location and tracks their movements over time. After transformation from the image to the real-world coordinates, water surface elevation time series have been obtained. Several experimental tests have been carried out to assess the feasibility and reliability of the proposed approach. The estimated wave synthetic parameters have been then compared with those obtained by employing standard resistive probes. The deviation were found to be equal to ~6% for the significant wave height and 1% for peak, mean, and significant wave periods.
ISSN:2072-4292
2072-4292
DOI:10.3390/rs12142288