Active local mining machinery, engineering machinery, mostly mountains and desert from human normal life mining site, sometimes even work on 2000 meters underground. Such mechanical sort is various, from the mineral crushing machinery to the cutting machine, screening machine, loading machinery, transportation machinery, etc., are all 24 hours per day continuous operation of the equipment. Either of these mechanical machinery fault happens, would give the scene of the mining production caused great influence, and, due to the recent large-scale machinery, also make maintenance work very hard.