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Electronic Interface for an Inductive Wear Debris Sensor for Detection of Ferrous and Non-Ferrous Particles

Davis, Joseph P
http://rave.ohiolink.edu/etdc/view?acc_num=akron1380998832

Abstract Details

2013, Master of Science in Engineering, University of Akron, Electrical Engineering.
This thesis presents an inductive method of detecting, roughly sizing and differentiating debris particles in lubrication oil. In the proposed approach, a sensing coil, with associated electronics, detects the passage of metal debris particles. Metal debris particles cause perturbations in the inductance and series resistance values of the sensing coil, which in turn affect the output voltage of the associated electronics. The sensing coil is connected to a Maxwell-Wien bridge that produces a change in differential voltage based upon a change in the inductance of the sensing coil. The bridge is intentionally imbalanced, such that a ferrous particle increases the differential voltage and a non-ferrous particle decreases the differential voltage. The signal is filtered, amplified and rectified to produce a DC varying output signal. Debris particles passing through the sensing coil produce pulses in the output signal. The height of the pulse can be measured to calculate the diameter of the individual debris particle. The debris sensor is shown experimentally to detect the presence and the approximate diameter of irregularly shaped iron (ferrous) particles 75 µm and 150 µm in mean diameter and copper (non-ferrous) particles 120 µm and 150 µm in mean diameter.
Joan Carletta, Dr. (Advisor)
Robert Veillette, Dr. (Advisor)
Kye-Shin Lee, Dr. (Committee Member)
106 p.
Electrical Engineering
Wear Debris Sensor; Inductive Sensing; Maxwell-Wien Bridge; Instrumentation Circuitry; Particle Sizing

Recommended Citations

Citations

  • Davis, J. P. (2013). Electronic Interface for an Inductive Wear Debris Sensor for Detection of Ferrous and Non-Ferrous Particles [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1380998832

    APA Style (7th edition)

  • Davis, Joseph. Electronic Interface for an Inductive Wear Debris Sensor for Detection of Ferrous and Non-Ferrous Particles. 2013. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1380998832.

    MLA Style (8th edition)

  • Davis, Joseph. "Electronic Interface for an Inductive Wear Debris Sensor for Detection of Ferrous and Non-Ferrous Particles." Master's thesis, University of Akron, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1380998832

    Chicago Manual of Style (17th edition)

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© 2013, all rights reserved.
This open access ETD is published by University of Akron and OhioLINK.