Instrumentation circuitry for an inductive wear debris sensor

Author

Davis, Joseph P. ; Carletta, Joan E. ; Veillette, Robert J. ; Du, Li ; Zhe, Jiang

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Akron, Akron, OH, USA

fYear

2012

Firstpage

501

Lastpage

504

Abstract

The design of instrumentation circuitry for an inductive sensor to detect small metal particles is presented. The sensor, designed for counting and characterizing wear debris particles in lubrication oil, detects changes in the inductance of a small coil as metal particles pass through it. A change in inductance produces a differential voltage at the output of a Maxwell-Wien bridge, which is then amplified and rectified to produce a DC voltage pulse detectable using standard data acquisition components. For iron particles approximately 75μm and 150μm in diameter, the circuit produces output voltage pulses of 381mV and 693mV, respectively.

Keywords

data acquisition; inductive sensors; metal detectors; network synthesis; wear; DC voltage pulse; Maxwell-Wien bridge; data acquisition components; differential voltage; inductive wear debris sensor; instrumentation circuitry; iron particles; lubrication oil; small metal particle detection; voltage 381 mV to 693 mV; wear debris particles; Atmospheric measurements; Bridge circuits; Coils; Inductance; Instruments; Particle measurements; Sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

New Circuits and Systems Conference (NEWCAS), 2012 IEEE 10th International

Conference_Location

Montreal, QC

Print_ISBN

978-1-4673-0857-1

Electronic_ISBN

978-1-4673-0858-8

Type

conf

DOI

10.1109/NEWCAS.2012.6329066

Filename

6329066