A moving line-source laser beam was used to scan the entire surface of a rectangular plate, pursuant to locating defects. The laser generates a point beam of laser energy, which is transformed into a line-heating source using sheet-forming optical components. The heat source is then scanned across the sample by placing the sample in a vertical position on a moving servo table, which moves horizontally at a prescribed speed. A relatively small overall temperature rise of 10° is desired to allow the heat transfer to be modeled mathematically assuming constant thermal properties. A thermal camera was employed for recording the temperature distribution on the nonheated side of the sample. Once a mathematical model or other smoothing technique is fitted to the experimental data, the calculated temperature is subtracted from the measured temperature, and a residual temperature field is created. Additional features of this research include the use of simple spline fits, Bayesian techniques, and the mollification method. The results are provided, which allow for a comparison of the effectiveness of each technique.


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    Titel :

    Detecting Material Defects Using a Scanning Laser Beam


    Beteiligte:
    McMasters, Robert L. (Autor:in) / Brooke, George M. (Autor:in) / David, John A. (Autor:in) / Taylor, Ryan P. (Autor:in) / Chang, Yi-Han (Autor:in) / LaRock, Grant (Autor:in) / Valencia, Keifer (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2018-10-12


    Format / Umfang :

    6 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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