Study on oil detection technology based on inductive wear debris sensor

Wear debris concentration and granularity in the lubricant oil contains the information about wear condition of machine. Based on the inductive balance principle and the detection requirement of wear debris, the off-line wear debris sensor and the on-line debris sensor are designed. And some measures of low noise design are used in the signal detection circuit of sensors. The experiments prove that the off-line sensor has satisfying accuracy and consistency for the concentration of the ferromagnetic wear debris, and the online sensor has effective detection capability for the granularity of the ferromagnetic wear debris and large unferromagnetic wear debris.