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Agent-based station for on-line diagnostics by self-adaptive laser Doppler vibrometry
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10.1063/1.4845475
/content/aip/journal/rsi/84/12/10.1063/1.4845475
http://aip.metastore.ingenta.com/content/aip/journal/rsi/84/12/10.1063/1.4845475
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Measurement station concept.

Image of FIG. 2.
FIG. 2.

Signal acquisition system and DAQ device for signal generation. Reprinted with permission from S. Serafini, N. Paone, and P. Castellini, AIP Conf. Proc.1457, 405–415 (Year: 2012). Copyright 2012 American Institute of Physics.

Image of FIG. 3.
FIG. 3.

(a) Block diagram of adaptive LDV operation, and (b) LDV signal adaptation.

Image of FIG. 4.
FIG. 4.

WU acquired by camera, in red templates used for pattern matching of WU and laser beam.

Image of FIG. 5.
FIG. 5.

Long period fluctuation of SQ. Reprinted with permission from S. Serafini, N. Paone, and P. Castellini, AIP Conf. Proc.1457, 405–415 (Year: 2012). Copyright 2012 American Institute of Physics.

Image of FIG. 6.
FIG. 6.

SQ(x,y) over a static WU: (b) is acquired 18 min after (a). Reprinted with permission from S. Serafini, N. Paone, and P. Castellini, AIP Conf. Proc.1457, 405–415 (Year: 2012). Copyright 2012 American Institute of Physics.

Image of FIG. 7.
FIG. 7.

SQ(x,y) during machine operation (WM is in centrifuge): (a) plotted on the same range as Figure 7 [0÷1], and (b) plotted on a lower range [0÷0.5]. Reprinted with permission from S. Serafini, N. Paone, and P. Castellini, AIP Conf. Proc.1457, 405–415 (Year: 2012). Copyright 2012 American Institute of Physics.

Image of FIG. 8.
FIG. 8.

Laser position sequence shown by arrows: SQ is maximum at the end of the adaptation process. Reprinted with permission from S. Serafini, N. Paone, and P. Castellini, AIP Conf. Proc.1457, 405–415 (Year: 2012). Copyright 2012 American Institute of Physics.

Image of FIG. 9.
FIG. 9.

Trend of signal quality SQ during self-adaptation of the laser Doppler vibrometer. Reprinted with permission from S. Serafini, N. Paone, and P. Castellini, AIP Conf. Proc.1457, 405–415 (Year: 2012). Copyright 2012 American Institute of Physics.

Image of FIG. 10.
FIG. 10.

Repeated tests without self-adaptation procedure. Reprinted with permission from S. Serafini, N. Paone, and P. Castellini, AIP Conf. Proc.1457, 405–415 (Year: 2012). Copyright 2012 American Institute of Physics.

Image of FIG. 11.
FIG. 11.

Repeated tests with and without self-adaptation procedure: the effect of the method is remarkable. Reprinted with permission from S. Serafini, N. Paone, and P. Castellini, AIP Conf. Proc.1457, 405–415 (Year: 2012). Copyright 2012 American Institute of Physics.

Image of FIG. 12.
FIG. 12.

Effect of vibration time history of the self-adaptation procedure.

Image of FIG. 13.
FIG. 13.

Effect of vibration spectrum of the self-adaptation procedure. Reprinted with permission from S. Serafini, N. Paone, and P. Castellini, AIP Conf. Proc.1457, 405–415 (Year: 2012). Copyright 2012 American Institute of Physics.

Image of FIG. 14.
FIG. 14.

Typical vibration signal during a test. The run-up (0-12 s), the steady state (12-36 s) and the coast down at the end of the signal can be recognized.

Image of FIG. 15.
FIG. 15.

Images acquired during the on line test: the system recognizes the different washing units of two different models and determines the correct position of the laser beam of the vibrometer.

Image of FIG. 16.
FIG. 16.

Vibration velocity signal acquired from different models of washing machine: each model is identified by the a numerical code.

Image of FIG. 17.
FIG. 17.

Comparison among 3 most relevant cases: on top a non-optimized signal, in the centre an optimized signal with no defect on the WM, and at the bottom an optimized signal of a defected WM.

Image of FIG. 18.
FIG. 18.

Comparison among transient measurement with and without signal optimization.

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/content/aip/journal/rsi/84/12/10.1063/1.4845475
2013-12-18
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Agent-based station for on-line diagnostics by self-adaptive laser Doppler vibrometry
http://aip.metastore.ingenta.com/content/aip/journal/rsi/84/12/10.1063/1.4845475
10.1063/1.4845475
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