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发布时间：2019-03-09

论文类型：期刊论文

发表时间：2012-10-01

发表刊物：OPTICS AND LASER TECHNOLOGY

收录刊物：Scopus、EI、SCIE

卷号：44

期号：7

页面范围：2125-2129

ISSN号：0030-3992

关键字：Subsea pipeline; Scour monitoring; Brillouin optical sensors

摘要：A scour monitoring system of subsea pipeline is proposed using distributed Brillouin optical sensors based on active thermometry. The system consists in a thermal cable running parallel to the pipeline, which acquires frequency shift of optical sensors during heating and cooling, directly indicating temperature change. The free spans can be detected through the different behaviors of heat transfer between in-water and in-sediment scenarios. Three features were extracted from temperature time histories including magnitude, spatial continuity and temporal stability. Several experimental tests were conducted using the proposed system. The results substantiate the monitoring technique. (c) 2012 Elsevier Ltd. All rights reserved.