For vehicles, construction machinery, ships, airplanes and other equipment equipped with internal combustion engines, engine lubricating oil plays a very important role in lubrication, cooling, cleaning and rust prevention processes. According to statistics, equipment failures caused by lubrication issues account for 55% to 65% of equipment accidents. Therefore, measuring the content of wear metals in lubricating oil can accurately understand the performance and operating status of equipment. The amount of metal content in the oil can infer the severity of mechanical wear, which is crucial for equipment maintenance and performance evaluation. Therefore, it is of great significance to regularly monitor the wear condition of mechanical equipment by detecting the percentage of metal wear elements in lubricating oil.