Wave measurement based on light refraction-中国期刊网

摘要 Someauthorshavedevelopedafewmethodsofmeasuringwaveslopesbasedonlightrefraction,includingthemeasurementmethodviathedistributionoflightintensityorcolorunderwater.Anewmethodbasedonlightrefractionisspecifiedforthemeasurementofwavesurfaceelevationinwaveflumeviaimagingtechnology.Aplanepaintedwithblackandwhitestripesisputontheflumefloorasanindicationplane,whichcanbearrangedeasilyandcheaply.Comparedwiththepreviousmethods,thepresentmethodislesssensitivetothenoiseandnonlineareffectsofopticalprocess,whichcanbetakenasadigitalmethod.TheCCDcameraisfixedabovetheflumewithitsopticalaxisarrangedverticallytograbtheimagesofstripesmodulatedbythewavesurface.ThemodulatedvaluecanbecalculatedfromtheHilberttransform,andthenthewavesurfaceelevationcanbeobtained.Thealgorithmandexperimentalprocedurearespecifiedindetail,andsomeexperimentalresultsareprovidedtoshowthevalidityofthepresentmethod.

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Wave measurement based on light refraction

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Wave measurement based on light refraction

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