Grease oil humidity sensor by using metamaterial

Abstract

Interaction between water and lubrication grease oil is not desirable, but it is not inevitable. The operational life of the machine component is influenced by humid grease oil. Metameterial-based transmission line sensor application is proposed and its operation is validated both numerically and experimentally by inserting grease oil samples in the sample holder. The proposed sensor structure is able to determine the humidity ratio of grease oil samples. The proposed structure shifts resonance frequency to react to the grease oil’s dielectric constant. The frequency shift of grease oil samples is monitored as about 300 MHz’s. Linearity characteristic between resonant frequency and dielectric constant value is validated. The novelty of this article is that no such study has been conducted by employing non-destructive methods which provide long-term stability of the sensor structure.

Acknowledgment

We would like to thank Mr. Fatih YILMAZ working as a mechanical engineer at Ekinciler Demir Celik Sanayii in Turkey for valuable support.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Şekip Dalgaç

Sekip Dalgaç received his master's degree in electrical-Electronical department from Iskenderun Technical University. He currently doing his Ph.D in Sivas University of Science and Technology. His main research interests are electromagnetic, metamaterial, sensors devices.

Murat Furat

Murat Furat was born in Kilis, Turkey in 1977. He received the BS, MS and Ph. D degrees in electrical-electronics engineering from Gaziantep University in 2002, Mustafa Kemal University in 2006 and Cukurova University in 2014, respectively. He has been an Assist. Prof. Dr. with Electrical-Electronics Engineering Department in Iskenderun Technical University since 2014. His research interests are sliding mode control, optimization and meta-heuristic algorithms.

Muharrem Karaaslan

Muharrem Karaaslan received the PhD degree in Physics Department from University of Cukurova, Adana, Turkey, in 2009. He has authored more than 100 research articles and conference proceedings. His research interests are applications of metamaterials, analysis and synthesis of antennas, and waveguides.

Oğuzhan Akgöl

Oguzhan Akgöl received his BSc, MSc and PhD degrees in Electrical and Electronics Engineering from Inonu University, Turkey; Polytechnic University, Brooklyn, NY, USA and the University of Illinois at Chicago (UIC), Chicago, IL, USA respectively. He isnow working at Iskenderun Technical University, Hatay, Turkey. His research interests are EM scattering, antennas and DNG materials.

Faruk Karadağ

Faruk Karadag received the Ph.D. degree in Physics Department from the University of Çukurova, Adana, Turkey, in 2002. He is the co-author of about 25 scientific contributions published in international journals and conference proceedings. His research interest includes the applications of metamaterials, solid state physics, and anisotropic media.

Mehmet Bakir

Mehmet Bakir received his Ph.D. degree in informatics department from Mustafa Kemal University in 2016. His main research interests are metamaterials, sensors, energy harvesting devices. He has authored more than 30 research articles and conference proceedings.