期刊
SENSORS
卷 16, 期 12, 页码 -出版社
MDPI
DOI: 10.3390/s16122118
关键词
vessel inspection; defect detection; unmanned aerial vehicle; supervised autonomy; machine learning; artificial neural network
资金
- EU-FP7 project INCASS [MOVE/FP7/605200/INCASS]
- Govern de les Illes Balears, Direccio General d'Innovacio i Recerca [AAEE50/2015]
- FEDER
- [BES-2015-071804]
- [MINECO DPI2014- 57746-C3-2-R]
Vessel maintenance requires periodic visual inspection of the hull in order to detect typical defective situations of steel structures such as, among others, coating breakdown and corrosion. These inspections are typically performed by well-trained surveyors at great cost because of the need for providing access means (e.g., scaffolding and/or cherry pickers) that allow the inspector to be at arm's reach from the structure under inspection. This paper describes a defect detection approach comprising a micro-aerial vehicle which is used to collect images from the surfaces under inspection, particularly focusing on remote areas where the surveyor has no visual access, and a coating breakdown/corrosion detector based on a three-layer feed-forward artificial neural network. As it is discussed in the paper, the success of the inspection process depends not only on the defect detection software but also on a number of assistance functions provided by the control architecture of the aerial platform, whose aim is to improve picture quality. Both aspects of the work are described along the different sections of the paper, as well as the classification performance attained.
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