Miniaturized integrated evanescent field IR-absorption sensor: Design and experimental verification with deteriorated lubrication oil

Kasberger, Jürgen; Fromherz, T.; Saeed, Ahmad; Jakoby, Bernhard

doi:10.1016/j.vibspec.2011.01.003

Cited by 18 publications

(11 citation statements)

References 22 publications

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“…Sensor systems researched have included infrared [2][3][4], hyperspectral [5], resonating [6][7][8][9][10], and electrochemical [11][12][13][14][15][16]. These sensors have attempted to monitor oil conditions such as viscosity [7,8,12,17]; acidity [6,[14][15][16]18]; fuel, water, or antifreeze contamination [3]; and antioxidants [11,13].…”

Section: Introductionmentioning

confidence: 99%

Distinguishing Gasoline Engine Oils of Different Viscosities Using Terahertz Time-Domain Spectroscopy

Adbul-Munaim

Reuter

Koch

et al. 2015

J Infrared Milli Terahz Waves

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THz-TDS in the range of 0.5-2.0 THz was evaluated for distinguishing among gasoline engine oils of three different grades from the same manufacturer. Absorption coefficient showed limited potential and only distinguished (p < 0.05) the 20W-50 grade from the other two grades in the 1.7-2.0 THz range. Refractive index data demonstrated relatively flat and consistently spaced curves for the three oil grades. ANOVA results confirmed a highly significant difference (p < 0.0001) in refractive index among each of the three oils across the 0.5 -2.0 THz range. Linear regression was applied to refractive index data at 0.25 THz intervals from 0.5 -2.0 THz to predict kinematic viscosity. All seven linear regression models, intercepts, and refractive index coefficients were highly significant (p < 0.0001). All models had a similar fit with R 2 ranging from 0.9773 to 0.9827 and RMSE ranging from 6.33 to 7.75.The refractive indices at 1.25 THz produced the best fit. The refractive indices of these oil samples were promising for identification and distinction of oil grades.

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Section: Introductionmentioning

confidence: 99%

Distinguishing Gasoline Engine Oils of Different Viscosities Using Terahertz Time-Domain Spectroscopy

Adbul-Munaim

Reuter

Koch

et al. 2015

J Infrared Milli Terahz Waves

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“…Sensor systems studied have included electromechanical (Cheek and Mowery, 1989;Duchowski and Mannebach, 2006;Price and Clarke, 1991;Soleimani et al, 2013;Wang et al, 1994;Wang, 2002) and resonating sensors (Agoston et al, 2005;Jakoby et al, 2003;Milpied et al, 2010;Mohammed and Hassan, 2013). Infrared (Blanco et al, 1998;Borin and Poppi, 2005;Kasberger et al, 2011) and hyperspectral (Lulu et al, 2014) spectroscopy techniques have also been used. The oil conditions these sensors attempted to monitor were acidity (Agoston et al, 2005;Moon et al, 2006;Soleimani et al, 2013;Wang et al, 1994;Wang, 2002), antioxidants (Cheek and Mowery, 1989;Price and Clarke, 1991), viscosity (Duchowski and Mannebach, 2006;Jakoby et al, 2003;Schmitigal and Moyer, 2005), and contaminants of fuel, water, or antifreeze (Borin and Poppi, 2005).…”

mentioning

confidence: 99%

Using Terahertz Time-Domain Spectroscopy to Discriminate among Water Contamination Levels in Diesel Engine Oil

2016

Trans. ASABE

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“…Optimized values for the thickness and the length of the waveguide can be found by calculating the maximum change of the normalized power of the guided mode. This allows for defining a sensitivity (figure of merit) using the following equation [16],…”

Section: Optimum Waveguide Designmentioning

confidence: 99%

Design and Analysis of a Slot Photonic Crystal Waveguide for Highly Sensitive Evanescent Field Absorption Sensing in Fluids

et al. 2020

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The design and modeling of a highly sensitive sensor based on a slot photonic crystal waveguide (slot-PCWG) is presented. The structure consists of cylindrical air rods drilled in a dielectric slab on a triangular lattice, which are filled with SiO2. The waveguide is formed by removing elements from the regular photonic crystal grid in a row, and embedding a slot in the center position. This concept allows for a vast enhancement of the evanescent field ratio, leading to a strong overlap between the field of the waveguide mode and the analyte. In the present work, we show that the sensitivity at the constant slab thickness of the slot-PCWG modes is greatly enhanced, up to a factor of 7.6 compared with the corresponding PCWG modes or Si-slab WGs. The finite-difference time-domain (FDTD) technique and plane wave expansion (PWE) methods were used to study the dispersion and profile of the PCWG mode. The simulation results show the potential of this design, which will be fabricated and tested in the following steps of the project.

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Miniaturized integrated evanescent field IR-absorption sensor: Design and experimental verification with deteriorated lubrication oil

Cited by 18 publications

References 22 publications

Distinguishing Gasoline Engine Oils of Different Viscosities Using Terahertz Time-Domain Spectroscopy

Distinguishing Gasoline Engine Oils of Different Viscosities Using Terahertz Time-Domain Spectroscopy

Using Terahertz Time-Domain Spectroscopy to Discriminate among Water Contamination Levels in Diesel Engine Oil

Design and Analysis of a Slot Photonic Crystal Waveguide for Highly Sensitive Evanescent Field Absorption Sensing in Fluids

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