In the electronics industry, equipment and lines are mostly in complex environments, and the internal structure of the precision, line-intensive, in special operating environments (such as high temperature, humidity, corrosion, dust), there are leakage, short-circuit, creepage, and other electrical faults, circumventing the damage to the equipment, fire or even personnel electrocution and other safety hazards, the equipment inside and outside the electromagnetic interference is becoming increasingly prominent, the data centers, communication base stations, and other large-scale electronic systems, the local electric field Excessive intensity leads to increased operation and maintenance costs.