Self-Detection of Leaking Pipes by One-Dimensional Photonic Crystals

We report a new self-detection control system for leaking pipes by making use of the surface defects of 1D photonic crystals,where the key concept is analog to the Bragg fiber structure.The current low costs and coating techniques of SiO2 are beneficial to the applications,and its error is below the standard requirement.The problem of leaking pipes can be resolved by devising a remote pipeline control system which combines a long-distance pipeline and a signal transmission system.