Fault detection for quality control of household appliances by non-invasive laser Doppler technique and likelihood classifierFault detection for quality control of household appliances by non-invasive laser Doppler technique and likelihood classifier Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2015-10-181999enThis paper addresses the problem of developing an on-line diagnostic system for mechanical quality control of household appliances. The selection of a suitable measurement technique for feature extraction is discussed; the choice of a laser Doppler vibrometer technique and a laboratory measurement station for washing machines is presented. Vibration velocity and displacement are measured over a grid of points on the machine surface and data are stored in a database suitable for processing, both with good appliances and with defect ones with known defects. Features from the vibration velocity spectrum are used as the input to a likelihood classifier, which is shown to achieve very good classification scoreshttp://creativecommons.org/licenses/by/4.0/Measurement425237–247 Pouliezos Anastasios Πουλιεζος Αναστασιος Stavrakakis Georgios Σταυρακακης Γεωργιος Lorenzo Scalise Nicola Paone Elsevier Doppler shift doppler effect doppler shift