Augmented reality graphic interface for upstream dam inspection

Jean Cote; Jean Lavallee

doi:10.1117/12.227945

1 December 1995 Augmented reality graphic interface for upstream dam inspection

Jean Cote, Jean Lavallee

Proceedings Volume 2590, Telemanipulator and Telepresence Technologies II; (1995) https://doi.org/10.1117/12.227945
Event: Photonics East '95, 1995, Philadelphia, PA, United States

Abstract

This paper presents a 3D graphic interface for the inspection of cracks along a dam. The monitoring of concrete dams is restricted by the accessibility of the various parts of the structure. Since the upstream face of a dam is not usually exposed, as in our case at Hydro- Quebec, a systematic and even ad hoc inspection become extremely complex. The piloting of a ROV (Remotely Operated Vehicle) underwater is like driving in a snowstorm. The view from the camera is similar to the visibility a driver would have in a snowstorm. Sensor fusion has to be performed by the operator since each sensor is specialized for its task. Even with a 2D positioning system or sonar scan, the approach to the inspection area is very tedious. A new 3D interface has been developed using augmented reality since the position and orientation of the vehicle are known. The point of view of the observer can easily be changed during a manipulation of the ROV. A shared memory based server can access the position data of the ROV and update the graphics in real time. The graphic environment can be used as well to drive the ROV with computer generated trajectories. A video card will be added to the Silicon Graphics workstation to display the view of the camera fixed to the ROV. This visual feedback will only be available when the ROV is close enough to the dam. The images will be calibrated since the position of the camera is known. The operator interface also includes a set of stereoscopic camera, hydrophonic (sound) feedback and imaging tools for measuring cracks.

Citation Download Citation

Jean Cote and Jean Lavallee "Augmented reality graphic interface for upstream dam inspection", Proc. SPIE 2590, Telemanipulator and Telepresence Technologies II, (1 December 1995); https://doi.org/10.1117/12.227945

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