A real-time non-contact monitoring method of subsea pipelines
1 College of Engineering, Ocean University of China, Qingdao, 266100, China
2 College of Information Engineering, Qingdao University, Qingdao, 266071, China
3 CNOOC Changzhou Paint & Coating Industry Research Institute Co.,Ltd, Tianjin, 300452, China
To monitoring the subsea pipeline in real-time, a special potentiometric sensor array and a potential prediction model are presented in this paper. Firstly, to measure the potential of seawater, a special potentiometric sensor array with Ag/AgCl all-solid-state reference electrodes is first developed in this paper. Secondly, according to the obtained distribution law of electric field intensities a prediction model of the pipeline potentials is developed. Finally, the potentiometric sensor array is applied in sink experiment and the prediction model is validated by the sink measurements. The maximum error for pipeline potential prediction model is 1.1 mV. The proposed non-contact monitoring method for subsea pipeline can predict the potential of sea pipeline in real-time, thus providing important information for further subsea pipeline maintenance.
© Owned by the authors, published by EDP Sciences, 2015
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