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Article

Novel Debris Material Identification Method Based on Impedance Microsensor

by
Haotian Shi
1,
Yucai Xie
2 and
Hongpeng Zhang
2,*
1
College of Safety Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
2
Marine Engineering College, Dalian Maritime University, Dalian 116026, China
*
Author to whom correspondence should be addressed.
Micromachines 2025, 16(7), 812; https://doi.org/10.3390/mi16070812
Submission received: 20 June 2025 / Revised: 10 July 2025 / Accepted: 12 July 2025 / Published: 14 July 2025
(This article belongs to the Special Issue MEMS/NEMS Devices and Applications, 3rd Edition)

Abstract

Oil condition monitoring can ensure the safe operation of mechanical equipment. Metal debris is full of friction information, and the identification of debris material helps to locate wear of parts. A method based on impedance analysis is proposed to identify debris material in this article. The differences in permeability and conductivity result in the nonlinear variation trend of inductance–resistance amplitude with debris volume. By establishing a database of amplitude–size curves, debris information (material and size) can be obtained through impedance analysis. Based on experimental and simulation results, iron, stainless steel, aluminum, copper, and brass particles are effectively distinguished. This method is not affected by oil’s light transmittance, other impurities, and debris surface dirt and can be used to distinguish metals with similar colors. This work provides a novel solution for debris material identification, which is expected to promote the development of fault diagnosis.
Keywords: oil condition monitoring; impedance debris sensor; material identification; coil-based impedance detection oil condition monitoring; impedance debris sensor; material identification; coil-based impedance detection

Share and Cite

MDPI and ACS Style

Shi, H.; Xie, Y.; Zhang, H. Novel Debris Material Identification Method Based on Impedance Microsensor. Micromachines 2025, 16, 812. https://doi.org/10.3390/mi16070812

AMA Style

Shi H, Xie Y, Zhang H. Novel Debris Material Identification Method Based on Impedance Microsensor. Micromachines. 2025; 16(7):812. https://doi.org/10.3390/mi16070812

Chicago/Turabian Style

Shi, Haotian, Yucai Xie, and Hongpeng Zhang. 2025. "Novel Debris Material Identification Method Based on Impedance Microsensor" Micromachines 16, no. 7: 812. https://doi.org/10.3390/mi16070812

APA Style

Shi, H., Xie, Y., & Zhang, H. (2025). Novel Debris Material Identification Method Based on Impedance Microsensor. Micromachines, 16(7), 812. https://doi.org/10.3390/mi16070812

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