The Geopig is one of the units of the traditional inline inspection which is used to verify integrity of pipeline system by finding and assessing different defects in a pipe wall-thickness. The results of Geopig are widely used for the determination of spatial position of the pipe centerline points. Note, that initial input information about the X-Y-Z position is given with some error. This leads to a huge noise in predicted curvatures which can overrun the useful information. The application of any smoothing procedure may lead to the loss of the useful information about curvatures. Two quantitative parameters are introduced here to allow performing such a tradeoff.
To find the pipe centerline geometry numerical algorithm is proposed. Each measured point as a compliant support is considered. Compliance of supports is determined using probabilistic analysis of device accuracy and acceptable accuracy of the curvature determination.
