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

Liu, Haitao; Tang, Xiecheng; Lu, Hao Ran; Xie, Wenjing; Hu, Yanmin; Xue, Qiannan

doi:10.1016/j.npe.2020.04.001

Cited by 15 publications

(11 citation statements)

References 17 publications

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“…The Karl Fischer is a representative method for measuring moisture, but it requires a complex experimental device and skilled skill for the analyzer. Therefore, the measurement of water contents with moisture sensor or dielectric constant sensor is effective in the lubricant oil analysis [28,29]. The oil analysis method with dielectric constant sensor is applied in marine diesel engines [27].…”

Section: Condition Monitoring With Oil Analysismentioning

confidence: 99%

“…However, in abnormal condition, larger wear particles between 20 μm and 100 μm are detected. Thus, wear particles larger than 20 μm should be monitored in order to provide an early warning of the machine condition [28,29]. The analysis of wear debris is important to detect critical stages of accelerated wear that precedes costly and dangerous components failures.…”

Section: Figure 27mentioning

confidence: 99%

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Tribology in Marine Diesel Engines

Hong¹

2022

Tribology of Machine Elements - Fundamentals and Applications

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This chapter deals with the tribology of marine diesel engines. Several types of diesel engines have been installed and used in the engine room of marine ships. Some of them, used for propulsion, operate at low-speed in a two-stroke combustion process in conjunction with propellers. Four-stroke engines are used for power generation and operates at medium-speed. In general, two or more four-stroke engines, including spares, are installed in the large ships. Tribological problems are important issue in the respect of reliability in the marine diesel engines, and there are many tribological engine components including bearings, pistons, fuel injection pumps and rollers. Moreover, the marine engines have lubricant problems such as lacquering. Improvements to the tribological performance of marine engine components, and lubricants can provide reduced oil and fuel consumption, improved durability, increased engines power outputs and maintenance. Therefore, this chapter shows better designs and methods in order to improve the tribological problem in the marine diesel engines.

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Section: Condition Monitoring With Oil Analysismentioning

confidence: 99%

Section: Figure 27mentioning

confidence: 99%

Tribology in Marine Diesel Engines

Hong¹

2022

Tribology of Machine Elements - Fundamentals and Applications

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“…For determining ethanol and kerosene blending in gasoline, a microwave submersible sensor with an SRR‐loaded coupled microstrip line has been proposed 2 . A microsensor chip that measures the variation in impedance value to detect moisture content in engine oil has been proposed 17 . Microwave sensors are economical, compact, and easily accessible.…”

Section: Introductionmentioning

confidence: 99%

Compact microwave sensor for monitoring aging of oil and fuel adulteration

Moolat

Mani

Viswanathan

et al. 2022

Int J RF Mic Comp-Aid Eng

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Adulteration detection of liquids is an emerging field in the present scenario. Purity detection of engine oils and fuels is essential for the smooth functioning of automobiles. An asymmetric coplanar strip fed stepped impedance resonator (SIR) coupled single split ring resonator (SSRR) sensor is used for purity and adulteration detection of engine oil and fuels in automobiles. The sensor operating at 5.95 GHz in free space on a low-cost substrate with a compact size of 10 Â 11.5 Â 1.6 mm 3 is demonstrated in this article. The impedance contrast between the two lines of SIR and the coupled SSRR improves the electric field distribution and thus the sensitivity. The resonant frequency of the proposed sensor changes with the aging of the oil or the adulteration level. The sensor performance is analyzed with simulations and validated with measurements.

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“…Microwave (MW) sensors can be very efficient devices for real-time water detection, since the dielectric constant of water, ε r,H2O = 70, is about 40 times the dielectric constant of diesel fuel, ε r, f uel = 1.75, at the frequency f = 10 GHz. Many different kinds of devices have been proposed, including coaxial antennas and microstrip sensors, stacked multi ring resonators (SMRR) or vertically stacked ring resonators (VSRR), and microwave resonant cavities [5][6][7][8][9][10][11]14,15,[20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Substrate-Integrated Waveguide Microwave Sensor for Water-in-Diesel Fuel Applications

et al. 2021

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A water-in-diesel microwave sensor based on a substrate integrated waveguide (SIW) microwave applicator is designed and characterized in this study. The interaction between the microwave electromagnetic field and the diesel fuel contaminated with small concentrations of water is obtained via suitable radiating slots placed on the top of an SIW waveguiding structure. The SIW applicator working frequency is chosen by observing the behavior of the complex dielectric permittivity of the fuel–water blend based on a preliminary wide band investigation. The performances of the SIW microwave sensor are evaluated in terms of scattering parameter modulus |S21| as a function of the water concentration in ppm. The best sensitivity Δ|S21|Δρ=1.42 mdB/ppm is obtained at a frequency of f=9.76 GHz, with a coefficient of determination R2=0.94. The sensor is low-cost, low profile and ensures a good sensitivity for constant and real-time monitoring.

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

Cited by 15 publications

References 17 publications

Tribology in Marine Diesel Engines

Tribology in Marine Diesel Engines

Compact microwave sensor for monitoring aging of oil and fuel adulteration

Substrate-Integrated Waveguide Microwave Sensor for Water-in-Diesel Fuel Applications

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