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Proceedings Paper

Comparative study between laser vibrometer and accelerometer measurements for mechanical fault detection of electric motors
Author(s): R. M. Rodriguez; C. Cristalli; Nicola Paone
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Paper Abstract

This paper presents a comparative study between accelerometer and laser vibrometer measurements aimed at on-line quality control carried out on universal motors of washing machines, which exhibit defects localized mainly in the bearings. The test is designed so to study measurement problems of an on-line station. Bearing defects include faults in the cage, in the rolling element and in the outer and inner ring. A set of no defective and defective motors were analyzed by means of the acceleration signal provided by the accelerometer, and the displacement and velocity signals given by a single point laser vibrometer. Advantages and disadvantages of both absolute and relative sensors and of contact and non-contact instrumentation will be exposed taking into account the applicability in real on line quality control measurements and bringing to evidence the related measurement problems due to the specific environmental conditions of assembly lines and sensor installation constraints.

Paper Details

Date Published: 22 May 2002
PDF: 9 pages
Proc. SPIE 4827, Fifth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (22 May 2002); doi: 10.1117/12.468154
Show Author Affiliations
R. M. Rodriguez, AEA s.r.l. (Italy)
C. Cristalli, AEA s.r.l. (Italy)
Nicola Paone, Univ. degli Studi di Ancona (Italy)

Published in SPIE Proceedings Vol. 4827:
Fifth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

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