Abstract: Hydraulic systems are widely used in mining machinery, the use of cyclic static sensors to monitor mining equipment hydraulic system suction line failure is feasible. In this paper, the finite element analysis software ANSOFT static electromagnetic field sensor sensitivity simulation study, the sensitivity of the three-dimensional distribution of the electrostatic sensor interpretation. Combined with self-built experimental apparatus was verified, and then get the relationship between the electrode width and signal bandwidth. The experiments prove that the electrode width selection is 5mm.

Key words: The ring electrostatic sensor, Hydraulic system, mining equipment, oil pipeline, sensitivity, fault diagnosis