Leak Detection to Heating Power Pipeline with Optical Fiber Grating

Temperature sensing technique of optical fiber grating is used to realize online leak detection to heating power pipeline. When the pipeline is leaking, the temperature field around pipeline is increasing. By using temperature characteristic of optical fiber grating temperature sensor with the changing law of temperature field at leakage location, theoretical analysis on leakage of heating power pipeline is carried out and leak detection system of optical fiber grating is applied to the engineering. The system of optical fiber grating is realized the continual monitor of the temperature at key point, which can find leakage of pipeline truly and offer a new method to leak detection to pipeline.