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Sensors 2013, 13(9), 11772-11781; doi:10.3390/s130911772

Surface Roughness Measurement on a Wing Aircraft by Speckle Correlation

*  and
Departamento de Física Aplicada (FARN), ETSI Minas, Universidad Politécnica de Madrid, C/Ríos Rosas 21, 28003 Madrid, Spain
* Author to whom correspondence should be addressed.
Received: 1 July 2013 / Revised: 26 August 2013 / Accepted: 30 August 2013 / Published: 5 September 2013
(This article belongs to the Special Issue State-of-the-Art Sensors Technology in Spain 2013)
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The study of the damage of aeronautical materials is important because it may change the microscopic surface structure profiles. The modification of geometrical surface properties can cause small instabilities and then a displacement of the boundary layer. One of the irregularities we can often find is surface roughness. Due to an increase of roughness and other effects, there may be extra momentum losses in the boundary layer and a modification in the parasite drag. In this paper we present a speckle method for measuring the surface roughness on an actual unmanned aircraft wing. The results show an inhomogeneous roughness distribution on the wing, as expected according to the anisotropic influence of the winds over the entire wing geometry. A calculation of the uncertainty of the technique is given.
Keywords: roughness measurement; speckle; non-contacting method; micro-detection roughness measurement; speckle; non-contacting method; micro-detection
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Salazar, F.; Barrientos, A. Surface Roughness Measurement on a Wing Aircraft by Speckle Correlation. Sensors 2013, 13, 11772-11781.

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