Dual Inductive–Capacitive Detection Cell: A Promising Tool for Distinguishing Mixed Metal Particles

The fine detection of oil abrasive particles in mechanical equipment is crucial to the fault determination of the equipment. Especially when particles of two different materials are mixed through the sensor, their effect on the sensor will inhibit each other, which in turn affects the detection results. Therefore, only a single form of detection method cannot achieve the differentiated detection of mixed signals. In this article, we design a metal abrasive particle mixing differentiation method based on inductive–capacitive dual detection unit, using the detection mechanism of different materials in the inductive and capacitive detection units to achieve the differentiated detection of mixed signals of metal particles of two different materials. This article explores the detection method from three aspects: theoretical analysis, simulation analysis, and experimental validation, respectively, and determines the feasibility of the method. This article gives a new method for the detection of mixed signals and provides a novel method for the design of subsequent accurate detection devices for lubricants.