Lubricating oil impurity measuring system based on resonant cavity

The utility model provides a lubricating oil impurity measuring system based on a resonant cavity, which is characterized in that a gear pump is respectively communicated with an oil filter, the resonant cavity and a magnetic filter through electric valves; the resonant cavity is respectively communicated with the vacuum pump and the liquid outlet through other electric valves; the resonant cavity is also communicated with the thermometer; the detector is connected with the resonant cavity and the A/D converter. The processor is respectively connected with the A/D converter and the signal source; the isolator is respectively connected with the signal source and the resonant cavity; the processor is further connected with the thermometer, the gear pump, the vacuum pump and all the electric valves. The device utilizes the resonant cavity microwave technology to measure the impurity content in the lubricating oil on line, and the measuring method is different from a chemical method, does not need reagents, is go