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Uncertainty Analysis of Dimension Calibration for Line Laser Scanning Measurement System

Line laser measurement technology has been widely used in the field of modern measurement due to quickly and efficiently collect the three-dimensional information of entities. In order to evaluate the measurement results of line laser, a measurement system based on line laser scanning is established in this paper. The sources of uncertainty of the measurement system are analyzed from two aspects: error traceability and value statistics. The measurement results are modeled by value statistics, the dimension of the standard gauge block is used as the evaluation object, the uncertainty of the measurement results is evaluated by GUM method and MCM method. The experimental results show that the uncertainty results obtained by the two methods are consistent, the distribution of the dimension calibration measurement results follows the trapezoidal distribution, and the uncertainty component introduced by temperature compensation is small, which can be ignored.