ERROR ANALYSIS METHOD BASED ON INDOOR VIRTUAL BASELINE FIELD

In order to effectively carry out indoor verification of long-distance photoelectric distance measuring instruments, an indoor virtual baseline field is built based on the principle of folding optical path with plane mirrors, and error analysis of the indoor baseline field is performed. First, on a 50m high-precision guide rail, three sets of plane mirrors are used to achieve a fourfold optical path multiplication, so a 200m indoor baseline is established. Second, a theoretical model for error analysis is built, and then main sources of measurement error are determined. Next, under different situations, the effects of each error angle on both the deviation of the light spot on each component in the baseline system and the baseline length are analyzed.