Abrasion is one of the main factors that affect machinery equipment’s reliability and working life-span. Particles produced by abrasion are important information carriers which reflect the abrasion status inner a machine. Lubricating oil has the important function of lubrication, seal and rinse. When lubricating oil is circulating, the particles move within it. Monitoring the particles and other contamination in oil is an important means to status monitoring and fault diagnosis. By oil monitoring, l...