Finite element simulation of dc leakage magnetic field distribution based on wire rope defect detection

Wire rope detection involves the development of the national economy and the safety of people's lives, and its accuracy mainly depends on the quality and sensitivity of the sensor. Through Maxwell finite element analysis software, the distribution of leakage magnetic field signal is simulated and analyzed. The law of the distribution of the leakage magnetic field above the defect is studied, the influence of the length and depth of the defect on the distribution of the leakage magnetic field above the defect, the lift-off height of the yoke, the structure size of the ferrite, and the relative permeability of the ferrite are studied. According to the law of the leakage magnetic field, and the relevant parameters and the leakage magnetic field are fitted into mathematical formulas through matlab, some meaningful research results are obtained. This research conclusion can provide a reference for the design and development of high-sensitivity detection sensor structure.