Abstract
Inductive wear particle sensors have been widely studied due to their ability to monitor the wear status of equipment in real time. To detect wear particles more precisely, a wear particle sensor based on multiple inductive coils under a toroidal magnetic field is proposed in this paper. With inductive coils located near a stronger magnetic field, the sensor can not only ensure the flow rate, but also enhance wear particle detection accuracy. The proportional relationship between the signal and the wear particle velocity and the excitation current is discussed in this paper. The crosstalk phenomenon among different inductive coils was also investigated by single particle experiments and lubricating oil dynamic experiments. In the dynamic oil experiment, the sensor detected $13~\mu \text{m}$ particles under a flow rate of 570 mL/min, which satisfied most industrial online monitoring demands.
Highlights
Modern industry development has produced more machinery and equipment for addressing repetitive and hazardous tasks
By undersampling the signal collected by the parallel inductive coil, the sensor proposed by Li et al was able to detect 75150 μm wear particles with a 21 ml/min oil flow rate [18]
With the inductive coils placed on the edge of the toroidal symmetrical magnetic field, the sensor sensitivity was improved while weakening the influence from the abrasive particle movement trajectory, and the oil flow could be controlled by the number of pipelines
Summary
Modern industry development has produced more machinery and equipment for addressing repetitive and hazardous tasks. By undersampling the signal collected by the parallel inductive coil, the sensor proposed by Li et al was able to detect 75150 μm wear particles with a 21 ml/min oil flow rate [18].
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