As-built inspection for concrete tank using non-contact three dimensional data acquisition / Nurul Huda Abd Rahman

Three dimensional laser scanner is a powerful data collection system that
provides 3D information for a specific area of interest. It is the predominate technology
for terrestrial survey, construction and as-built analysis. TLS commonly produce
centimeter spatial and range accuracy at several hundred meter range. Due to tank
inspection that require accurate data, TLS is able to provide high accuracy data for tank
inspection requirement. Several approaches tank inspection method has been done by
previous research. It has shows have limitation in data acquisition, data processing and
data analysis. Therefore, the aim of this study is to investigate the suitability of TLS
measurement technique in concrete tank inspection. In order to achieve the objective,
some analysis has been done through the methodology by perform dimensional analysis
and point to point analysis. There are 42 artificial targets distributed of concrete tank
are used in this analysis to examine data quality of TLS in concrete tank inspection by
total station data as benchmarking. Second analysis is to investigate the reliability of
TLS data to perform surface inspection by create surface deviation model to detect
defect surface on concrete tank. The result was evaluated by standard deviation, RMS
residuals and surface deviation model. The result has shows TLS data can be used on
concrete tank inspection.