The design of strain sensitising of high-sensitivity SAW sensor based on FBG

It is very necessary to build the integrity of the oil and gas transport pipe network in the steady development of the oil and gas industry. There are a lot of oil and gas pipelines have been in service for more than two decades in China, which means a big security risk. Pipeline leak is a typical example of security incidents. Therefore, the establishment of a system of effective detection pipeline leak will be a priority. We propose fibre Bragg grating (FBG)-based optical fibre sensors for detecting pipeline leakage in oil and gas transportation systems. By placing a sensor on each end of a pipe, the velocity and position of the pipeline leakage can be detected through a series of calculations on the correlation analysis, the time difference, and the characteristics of surface waves. We improve the sensitivity and the accuracy of positioning for the FBG-based optical fibre sensors by enhancing the FBG strain response sensitivity. Copyright © 2018 Inderscience Enterprises Ltd.