A microfluidic Coulter counting device for metal wear detection in lubrication oil

Murali, Srinidhi; Jagtiani, Ashish V.; Xia, Xingao; Carletta, Joan; Zhe, Jiang
January 2009
Review of Scientific Instruments;Jan2009, Vol. 80 Issue 1, pN.PAG
Academic Journal
We present the design, fabrication, and testing of a microfluidic device for metal wear detection in lubrication oils. The detection is based on the capacitance Coulter counting principle, that is, on the change in a microchannel’s capacitance caused by the presence of a metal particle in the microchannel. The testing of the microfluidic device using 10–25 μm aluminum particles has demonstrated the feasibility for detection and counting of microscale metal particles in low-conductive lubrication oils. This microfluidic device is promising for online oil debris detection by the use of multiple detection microfluidic channels.


Related Articles

  • Methods for Measuring of Small Capacitance. Velev, Rosen Grigorov; Ivanov, Simeon Ivanov // Annual Journal of Electronics;2010, Vol. 4 Issue 1, p65 

    The article describes two methods for measuring of small capacitance. Two measurement systems are investigated by the authors, covering two different measurement principles. Both are experimented in real measuring capacitance of MEMS structures.

  • Análisis y caracterización de un acelerómetro capacitivo fabricado con tecnología polymump's. Rincon-Jara, R. I.; Ambrosio, R.; Mireles, J. // Superficies y Vacío;2010, Vol. 23 Issue 3, p26 

    This work presents the analysis and characterization of a capacitive accelerometer fabricated with PolyMUMP's technology. The structure contains a proof mass which is suspended between fixed rigid electrodes to sense differential capacitance measurement. The accelerometer structure was simulated...

  • Comment on “Comparison of air breakdown and substrate injection as mechanisms to induce dielectric charging in microelectromechanical switches” [Appl. Phys. Lett. 92, 043502 (2008)]. Olszewski, Zbigniew; O’Mahony, Conor; Houlihan, Ruth; Duane, Russell // Applied Physics Letters;10/26/2009, Vol. 95 Issue 17, p176101 

    The purpose of this comment is to provide additional insight into the reliability of microelectromechanical capacitive switches (MEMSs) investigated by Molinero and Castañer [Appl. Phys. Lett. 92, 043502 (2008)]. We show that the presence or absence of ambient humidity determines whether the...

  • Effects of dielectric charging on fundamental forces and reliability in capacitive microelectromechanical systems radio frequency switch contacts. Patton, Steven T.; Zabinski, Jeffrey S. // Journal of Applied Physics;5/1/2006, Vol. 99 Issue 9, p094910 

    Microelectromechanical systems (MEMS) radio frequency switches hold great promise in a myriad of commercial, aerospace, and military applications. In particular, capacitive-type switches with metal-to-dielectric contacts (typically gold-on-silicon nitride) are suitable for high frequency (>=10...

  • Characterization of a capacitance-coupled contactless conductivity detection system with sidewall electrodes on a low-voltage-driven electrophoresis microchip. Yi Xu; Jing Liang; Haitao Liu; Xiaoguo Hu; Zhiyu Wen; Yongjie Wu; Mingxia Cao // Analytical & Bioanalytical Chemistry;Jun2010, Vol. 397 Issue 4, p1583 

    A new type of capacitance-coupled contactless conductivity detection (C4D) system with sidewall electrodes was proposed for integration on a silicon-on-isolator–poly(dimethylsiloxane) (SOI-PDMS) hybrid low-voltage-driven electrophoresis microchip. By a microelectromechanical system...

  • Thermal-to-electric energy conversion using ferroelectric film capacitors. Kozyrev, A. B.; Platonov, R. A.; Soldatenkov, O. I. // Journal of Applied Physics;2014, Vol. 116 Issue 16, p164111-1 

    The capacitive ferroelectric thermoelectric converter harvesting electrical energy through non-linear capacitance variation caused by changes in temperature is analyzed. The ferroelectric material used was the thin (0.5 μm) Ba0.3Sr0.7TiO3 film. On the basis of experimental dependencies of the...

  • Water droplet lubrication for micromachines. Hiratsuka, K.; Bohno, A.; Mendo, H. // Materials Science;May2007, Vol. 43 Issue 3, p423 

    Water droplets placed on hydrophilic surface decrease the friction coefficient in the process of sliding over the hydrophobic surface. The droplets placed between these surfaces sustain loads of up to 170 mN and the friction coefficient for these surfaces is equal to 1.1 · 10−3. The low...

  • MEMS: An end to fear of contact. Day, Linda // Tribology & Lubrication Technology;Feb2010, Vol. 66 Issue 2, p32 

    The article offers information on the advantages of the micro-electrical-mechanical systems (MEMS) as a technology for lubrication. It mentions that MEMS can address issues on adhesion, friction, and wear problems in MEMS gears, motors, turbines and sliders through its ability to eliminate...

  • LUBING UP THE MICROMACHINES. Brown, Joe // Popular Science;Jun2005, Vol. 266 Issue 6, p42 

    Focuses on the lubricant developed by material scientist Michael Dugger that can make micromachines moving under extreme temperature. Features of the lubricant; Advantages of the product; Direction on applying the lubricant.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics