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Performance Assessment of Novel Offshore Cable Detectors Based on Synthetic Data
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 1st Conference on Geophysics for Infrastructure Planning Monitoring and BIM, Sep 2019, Volume 2019, p.1 - 5
Abstract
Submarine power cables are an important infrastructure in modern times to connect, for example, separate energy power grids or offshore windfarm with the mainland. The position of these buried cables is often known only roughly after installation due to several reasons. Therefore, a cable tracking system is used which can detect the cable’s position. In this thesis, a novel system is presented which is based on inverting the magnetic field measured which is created by an active signal in the cable. An array of five three-axis fluxgate magnetometers measure the magnetic flux. Two different algorithms for detection are introduced. The first method relies on a simple model of the cable and a non-linear system of equation to estimate the location by inverting the total magnetic field measured by each sensor. The second approach uses the three-axis measurements to get the direction where the cable is from each sensor. The distance to the sensor array can be than estimated by using at least three different direction measurements. Both approaches are evaluated on synthetic data obtained by modelling the magnetic response of a cable in a marine environment.