A scour monitoring method for subsea pipelines is proposed using distributed Raman optical sensors based on active thermometry to achieve distributed monitoring of the scour and free span of a subsea pipeline. The method consists of three parts: a thermal cable, a data acquisition unit (DAU), and a data processing unit (DPU). In this paper, an industrial cable is used as the thermal cable, which can act as the heat source as well as to monitor the temperature. A DTS8000 thermodetector collects the temperature information over time. The surroundings of the subsea pipeline turn from sediment into seawater when scour and free span occur. The heat transfer properties are different between the two media, and the free span and length of the subsea pipeline can be detected from the different temperature change patterns during the heating and cooling process using a distributed Raman scattering technique. In this paper, we mainly focus on recognizing the interface of different media. Tests demonstrate good results in the identification of the interface using an industrial cable as a thermal cable.
Xinwang Zhang and Xuefeng Zhao, "Research on subsea pipeline scour monitoring using distributed Raman optical sensing technique," Proc. SPIE 10598, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2018, 105982F (Presented at SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring: March 08, 2018; Published: 27 March 2018); https://doi.org/10.1117/12.2296557.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the conference proceedings. They include the speaker's narration along with a video recording of the presentation slides and animations. Many conference presentations also include full-text papers. Search and browse our growing collection of more than 12,000 conference presentations, including many plenary and keynote presentations.