Research on Magnetic Field Imaging Method of Grounding Grid

Grounding grid will produce space magnetic field when current is introduced. Using space magnetic field can be used to locate hidden engineering such as grounding grid, and can assist excavation inspection and corrosion diagnostics. Firstly, this paper analyzes the magnetic field detection method of large-scale ground area under the condition of additional exciting current. On this basis, a portable three-dimensional magnetic field sensor is used to detect the ground magnetic field of a project. Advanced computer imaging method can assist to determine the position of underground conductor, which provides additional technical support for the maintenance and detection of grounding grid.