An interdigitated impedance microsensor for detection of moisture content in engine oil

Haitao Liu; Xiecheng Tang; Hao Lu; Wenguang Xie; Yanmin Hu; Qiannan Xue

Nanotechnology and Precision Engineering (Jun 2020)

An interdigitated impedance microsensor for detection of moisture content in engine oil

Haitao Liu,
Xiecheng Tang,
Hao Lu,
Wenguang Xie,
Yanmin Hu,
Qiannan Xue

Affiliations

Haitao Liu: State Key Laboratory of Precision Measuring Technology and Instruments, School of Precision Instruments and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China; Sino-European Institute of Aviation Engineering, Civil Aviation University of China, Tianjin 300300, China; College of Electronic Information and Automation, Civil Aviation University of China, Tianjin 300300, China
Xiecheng Tang: State Key Laboratory of Precision Measuring Technology and Instruments, School of Precision Instruments and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China; Sino-European Institute of Aviation Engineering, Civil Aviation University of China, Tianjin 300300, China
Hao Lu: Civil Aircraft Airworthiness Certification Technology Key Laboratory of Tianjin, Civil Aviation University of China, Tianjin 300300, China
Wenguang Xie: Civil Aircraft Airworthiness Certification Technology Key Laboratory of Tianjin, Civil Aviation University of China, Tianjin 300300, China
Yanmin Hu: Sino-European Institute of Aviation Engineering, Civil Aviation University of China, Tianjin 300300, China
Qiannan Xue: State Key Laboratory of Precision Measuring Technology and Instruments, School of Precision Instruments and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China; Corresponding author.

Journal volume & issue: Vol. 3, no. 2
pp. 75 – 80

Abstract

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To address the need for the on-site measurement of aging oil, in this paper, we propose an impedance-based microsensor for analyzing the moisture content in engine oil. Using a microfabrication process, we fabricated an interdigitated microelectrode and integrated it with a 3D-printed microcontainer to produce a microsensor that can detect changes in the permittivity of oil. When the moisture content in oil increases, this sensor can detect the resulting change in the oil impedance, which is related to its permittivity, and then determine the degree to which the oil has aged. The test results show that the proposed microsensor has the advantages of being small and having high sensitivity, good accuracy, and the ability to be combined with hand-held instruments. The proposed method is expected to be used for the rapid, low cost, on-site determination of oil aging.

Published in Nanotechnology and Precision Engineering

ISSN: 1672-6030 (Print); 2589-5540 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General)
Website: https://aip.scitation.org/journal/npe

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