The University of Southampton

Distributed Acoustic Sensor: Mapping Strain and Vibration with Optical Fibre Seminar

24 October 2017
Building 13 Room 3017

Event details

ISVR Engineering Research Seminar Series 2017-2018

Distributed optical fibre sensors (DOFS) have some unique features that has no parallel in conventional sensing techniques. The ability of measuring physical phenomenon such as temperatures and vibrations at thousands of points along a single fibre under harsh conditions and in an inaccessible environments is particularly interesting for the monitoring of structures such as pipelines, flow lines, oil wells, and boreholes. Despite a steady improvement in the performance of DOFS, most of the research has been focused on advancing DC and quasi-DC distributed sensors. Recently, we have developed a distributed vibration sensor, also known as distributed acoustic sensor (DAS), capable of fully quantifying dynamic disturbances along the optical fibre. Using a technique known as optical time-domain reflectometry (OTDR), the sensor has been used to measure the frequency components of multiple disturbances along a 4km sensing fibre simultaneously. In this presentation, distributed optical fibre sensors will be defined and their advantages over conventional sensing techniques will be discussed. The principle of operation of optical time domain reflectometry (OTDR) sensing technique will be explained. Finally, the principle of DAS will be discussed.

Speaker information

Dr Ali Masoudi, Optoelectronics Research Centre (ORC). Dr Ali Masoudi is a post-doctoral research fellow at the Optoelectronics Research Centre (ORC), the University of Southampton. He received his PhD in 2014 for his work on distributed optical fibre dynamic strain sensors. He is currently working on an EPSRC grant to develop a distributed fibre optic acoustic sensor for Railway signaling and health monitoring as well as a seed grant from RAEng for smart city project.

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