The assessment of uncertainty of the measurement system of bullet contour geometric dimension

In this paper, a method of assessing uncertainty of measurement system of bullet contour geometric dimension is introduced. The measurement system is used to measure multiple projectile body and multiple caliber bullet contour geometric dimension. In the system a non-contact 3-axis measuring coordinate is adopted. The assessment of uncertainty of the measurement system is conducted in order to improve its accuracy and reliability in this paper. As a result, the standard uncertainty is composed and final report of uncertainty in measurement is given. The conclusions of the report indicate that the measuring result is accurate.