Multi-leak detection in pipeline based on optical fiber detection

Abstract In order to solve simultaneous multi-leak problem of the pipeline, a method to detect multi-leak of pipeline by using optical fiber detection technology is proposed. Firstly, use optical fiber sensors to detect pressure signal, then construct the residual generator based on the fault diagnosis observer, and the leak coefficients are extracted by the residual error. Secondly, make the observer has good robustness to the unknown input disturbance by using the decoupling technology for disturbance. Stability of the fault diagnosis observer is proven by using the Lyapunov function and Barbalat lemma. The approach can detect and estimate the leak coefficients. Experiment results show that the effectiveness of the propsed approach.