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  • Analysis of sonic waves generated during laser engraving of printed circuits
    Gorkič, Aleš ; Kovačič, Drago ; Diaci, Janez
    We present an experiment where sonic waves generated during the laser engraving of printed circuit boards (PCB) were acquired and analyzed. The sonic waves were detected simultaneously using a ... microphone and a laser beam deflection probe. An efficient windowed peak-to-peak signal processing algorithm was developed to examine the relation between the detected signals and the engraving quality. The results of signal analysis were compared to the engraving surface topography, measured by means of optical microscopy with extended depth-of-field digital photography. The results show that it is possible to distinguish between shallow, good, and burnt engravings by examination of the acquired sonic signals. This observation opens the possibility of automated monitoring or even control of the process of laser engraving PCBs using sonic wave detection.
    Vir: International journal of advanced manufacturing technology. - ISSN 0268-3768 (Vol. 42, no. 1-2, 2009, str. 138-144)
    Vrsta gradiva - članek, sestavni del ; neleposlovje za odrasle
    Leto - 2009
    Jezik - angleški
    COBISS.SI-ID - 10530843

    Povezava(-e):

    http://dx.doi.org/10.1007/s00170-008-1581-7
    DOI

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