English to Russian Tech/Engineering Metallurgy / Casting Неразрушающий контроль

0030] Desirable characteristics of the scanner laser system 20 include time precision in order to provide desired levels of range accuracy, angular measurement precision, and beam sizes that will provide the desired overall precision as noted above. The minimum detectable feature size is dependent on the scanner's ability to spatially resolve an individual scanned point. Scanner uncertainty may be thought of as a sphere around a point with radius QScanner. Using cscanner as the first standard deviation of the measurement uncertainty means there is 86% probability that the measured point is within the uncertainty sphere. Using this metric and heuristic data, the minimum feature size attainable, i.e., that can be seen, is twice the scanner uncertainty. This assertion is subject to the measurement resolution being less than or equal to the scanner uncertainty. The measurement resolution is the spatial separation of points on a measured surface. The measurement or scanner uncertainty is dominated by at least three terms, i.e., the range uncertainty (< R), the angular measurement uncertainty (aAngie), and the beam diameter uncertainty (σβ). Assuming these are random variables, one can estimate the scanner uncertainty as the sum of the squares of range and angular uncertainties. Range uncertainty is dependent on the scanner's ability to measure range, hence a timing uncertainty (or 5t).

WO 2016/010635

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