Inductance-capacitance Dual Mode Sensor for the Detection of Contaminants in Hydraulic Oil

doi:10.3901/JME.2020.02.020

Abstract

Abstract: A inductance-capacitance dual-mode sensor is proposed for detection of multi-contaminant in hydraulic oil. The designed sensor is composed of silicon steel sheet and planar coil. By switching the detection mode, it not only detects ferromagnetic and non-ferromagnetic particles as an inductive sensor, but also detects water droplets and air bubbles as a capacitive sensor. Compared with traditional inductive sensors, the dual-mode detection sensor not only detects multiple contaminants, but also the silicon steel sheet can effectively increase the magnetic field strength of the detection region, thereby improving the accuracy of the inductance detection. On the built detection system, the sensor is used to detect various contaminants in the hydraulic oil. In the inductive mode, 30 μm iron particles and 110 μm copper particles are successfully detected. In the capacitive mode, 130 μm water droplets and 170 μm air bubbles are detected. This study provides technical support for the comprehensive detection of hydraulic oil contaminants, which is of great significance for preventing hydraulic system failures and extending the working life of hydraulic equipment.

Key words: hydraulic oil, dual-mode, comprehensive detection, microfluidic chip

CLC Number:

TP212
TH73

SHI Haotian, ZHANG Hongpeng, GU Changzhi, MA Laihao, LI Guobin. Inductance-capacitance Dual Mode Sensor for the Detection of Contaminants in Hydraulic Oil[J]. Journal of Mechanical Engineering, 2020, 56(2): 20-26.

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