Positioning for Entry Control of Deep-Sea Risers Based on Image Processing

Abstract

Abstract:

Abstract： Entry operation is required to connect a riser end with a bottom platform on the seabed. In entry operation, the relative position between the riser end and the bottom platform should be measured. To facilitate entry operation, a positioning approach based on image processing was presented in this paper, which is convenient to measure the relative position between the riser end and the bottom with underwater cameras onboard a remotely operated vehicle (ROV). During image processing, the targets of the riser end and the bottom platform were recognized from the obtained image by matching the contour models of the targets, and the regions of targets were highlighted. In the regions, the coordinates of riser end and the bottom of platform referred to the camera were calculated from rectangle marks on the tabs attached to the riser end and the bottom platform. The relative position between the riser end and the bottom platform can be determined thereby. To test the effectiveness of the approach, a model experiment in water tank was conducted.
Key words：

Key words: riser, image processing, remotely operated vehicle (ROV), relative position, model experiment

CLC Number:

P 756

LU Xiang,FENG Zhengping,XU Xuesong. Positioning for Entry Control of Deep-Sea Risers Based on Image Processing[J]. Journal of Shanghai Jiaotong University, 2014, 48(12): 1802-1808.

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