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Proceedings Paper

On-line diagnostics of washing machines: design issues for the optimization of the measurement set-up
Author(s): G. Agostinelli; N. Paone; C. Cristalli; B. Torcianti
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Paper Abstract

This paper discusses some of the relevant aspects that a designer of an on-line test station for washing machine diagnostics based on a single-point laser Doppler vibrometer should consider. In particular, the paper presents a series of experiments useful to answer the two following questions: a) Where to locate the measurement point? b) Does the test need to be done with an external load to be inserted into the rotating drum? Tests have been done on a "good" washing machine and on a machine exhibiting the most frequent defects to be detected in production line. The study of the Operating Deflection Shapes (ODS) of the machine has been used to determine the best area of the machine cabinet where to position the single point laser vibrometer for on-line diagnostics. In order to support the decision whether or not to employ an artificial unbalance load inserted into the drum during the dynamic test, measurements have been repeated with and without load. Results have been analysed to highlight pros and cons of the use of an external load.

Paper Details

Date Published: 17 June 2008
PDF: 11 pages
Proc. SPIE 7098, Eighth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 70980H (17 June 2008); doi: 10.1117/12.802985
Show Author Affiliations
G. Agostinelli, Univ. Politecnica delle Marche (Italy)
N. Paone, Univ. Politecnica delle Marche (Italy)
C. Cristalli, Loccioni Group (Italy)
B. Torcianti, Loccioni Group (Italy)


Published in SPIE Proceedings Vol. 7098:
Eighth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications

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