Inproceedings,

Signed Distance Function Based Surface Reconstruction of a Submerged Inland Mine Using Continuous-Time SLAM

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Proceedings of the 20th World Congress of the International Federation of Automatic Control (IFAC WC '17), Toulouse, France, (July 2017)
DOI: 10.1016/j.ifacol.2017.08.397

Abstract

The planning of mining operations in water filled open-pit mines requires detailed bathymetry to create a mine plan and assess the involved risks. This paper presents post- processing techniques for creating an improved 3D model from a survey carried out using an autonomous surface vehicle with a multibeam sonar and a GPS/INS navigation system. Inconsistencies of the created point cloud as a result of calibration errors or GPS signal loss are corrected using a continuous-time simultaneous localization and mapping (SLAM) solution. Signed distance function based mapping is employed to fuse the measurements from multiple runs into a consistent representation and reduce sensor noise. From the signed distance function model we reconstruct a 3D surface mesh. We use this terrain model to establish a virtual reality scene for immersive data visualization of the mining operations for testing and planing during development. Results of the proposed approach are demonstrated on a dataset captured in an abandoned submerged inland mine.

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