Comparative study between laser vibrometer and accelerometer measurements for mechanical fault detection of electric motors

R. M. Rodriguez; C. Cristalli; Nicola Paone

doi:10.1117/12.468154

22 May 2002 Comparative study between laser vibrometer and accelerometer measurements for mechanical fault detection of electric motors

R. M. Rodriguez, C. Cristalli, Nicola Paone

Author Affiliations +

Proceedings Volume 4827, Fifth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (2002) https://doi.org/10.1117/12.468154
Event: Fifth International Conference on Vibration Measurements by Laser Techniques, 2002, Ancona, Italy

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.

Citation Download Citation

R. M. Rodriguez, C. Cristalli, and Nicola Paone "Comparative study between laser vibrometer and accelerometer measurements for mechanical fault detection of electric motors", Proc. SPIE 4827, Fifth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (22 May 2002); https://doi.org/10.1117/12.468154

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