- Tytuł:
- The system of measurement of underwater objects with the visual method
- Autorzy:
- Olejnik, A.
- Powiązania:
- https://bibliotekanauki.pl/articles/245460.pdf
- Data publikacji:
- 2013
- Wydawca:
- Instytut Techniczny Wojsk Lotniczych
- Tematy:
-
underwater works technology
underwater photogrammetry
technical diagnostics - Opis:
- This material presents the results of works implemented so far at the Department of Underwater Works Technology of the Polish Naval Academy in Gdynia within the project No. O N502 274039 focused on an attempt to prepare theoretical assumptions for the visual diagnostics system for underwater objects. The main accomplishments until now have been the preparation of a mathematical model allowing specification of dimensions of photographed underwater objects and construction of a prototype underwater photogrammetric camera together with software used in frame analysis. Moreover, the project involved carrying out experiments resulting in an initial assessment of the prepared method. Currently obtained results indicate that the measurement method under verification based on a light model constitutes a rough measurement method. Relative uncertainties regarding the measurement of linear quantities at average amount to 10%. What has a significant impact on the size of this error is the fact of defining nodal points in relation to figures and segments analysed in a given frame with the use of a cursor manually controlled with a computer mouse. This leads to the conclusion that ‘manual’ introduction of nodal points for the examined figures constitutes the weakest element of the verified measurement method and its modification will be the main objective of further research. It is expected that the CYKLOP camera and the application prepared for its operation will constitute a system for a technical assessment of underwater objects on the basis of visual research. This will be an important leap in relation to the quality of the visual examination of underwater objects, as the methods used so far allowed only qualitative assessment of objects. The constructed system will, on the other hand, enable obtaining both qualitative and quantitative data.
- Źródło:
-
Journal of KONES; 2013, 20, 4; 313-317
1231-4005
2354-0133 - Pojawia się w:
- Journal of KONES
- Dostawca treści:
- Biblioteka Nauki
Artykuł