Study on electric field component imaging of leakage in pipeline using GPR

Ground penetrating radar(GPR) is an effective method for pipeline leak detection, but when the distribution of underground media is more complex, it is difficult to accurately identify the leakage anomaly from the GPR data profile. In this paper, the imaging technique of GPR data based on electric field component is proposed according to the relationship between the reflection coefficient and the dielectric constant. In this paper, the time-domain finite difference method(FDTD) is used to simulate the electromagnetic response of the geo-electric model with different dielectric constant in the GPR. The results show that the greater the difference in dielectric constant, the stronger the reflected wave energy. Finally, the proposed imaging technique is applied to pipeline leakage detection in an industrial area. The experimental results show that the pipeline leakage anomaly area is characterized by high amplitude area in the electric field component map.