Design and Research of High Sensitivity Double-coil Wear Debris Sensor

doi:10.3901/JME.2021.02.039

Abstract

Abstract: A high sensitivity dual-coil wear debris sensor that detects inductance and resistance parameters is presented, which provides technical support for the detection of particle contamination in hydraulic oil. The excitation silicon steel sheet and built-in silicon steel sheet generate a high-intensity magnetic field in the detection region by magnetization and aggregation effect, thereby improving the detection accuracy of the sensor. The square detection channel is designed to make full use of the region between the two coils, increasing the detection throughput of the sensor. Experiments show that the built-in silicon steel sheet does not change the signal noise of the wear debris sensor, which is conducive to obtain a better signal-to-noise ratio. In the region of the exciting silicon steel sheet and the built-in silicon steel sheet are placed opposite each other, the magnetic field strength is the strongest, so the inductance and resistance peak of metal particles will occur. In the built measuring system, the metal wear debris in the oil is detected. In the experiments, the 25 μm iron particle and 100 μm copper particle can be detected with inductance parameter, and the 35 μm iron particle and 85 μm copper particle can be detected with resistance parameter. By combining the inductance detection and resistance detection results, the wear debris sensor can distinguish and detect 25 μm iron particles and 85 μm copper particles.

Key words: wear debris sensor, dual-coil, silicon steel sheet, high sensitivity, inductance parameter, resistance parameter

CLC Number:

TP212
TH73

SHI Haotian, ZHANG Hongpeng, MA Laihao, ZENG Naibin, LIU Cheng, CHEN Haiquan. Design and Research of High Sensitivity Double-coil Wear Debris Sensor[J]. Journal of Mechanical Engineering, 2021, 57(2): 39-45.

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