The more times of plugging and unplugging, the more obvious the scratch marks on the surface of the terminal. Under the action of long-term work and the external environment, the terminal is very easy to fail. It is mainly due to the oxidative corrosion caused by the small relative movement of the contact surface, usually 10~100μm relative movement; violent movement may cause harmful wear between the contact surfaces, slight vibration may cause friction corrosion, thermal shock and environmental influences accelerate the process .
Generally, for such problems, the problem disappears after the connector moves or the equipment (sensor, processor, etc.) is replaced, which can temporarily disappear the problem, but the failure will still reappear after long-term use.