METHOD FOR TRANSMITTING UNIT OF PLANE ANGLE TO GEODESIC ANGLE MEASURING INSTRUMENTS Russian patent published in 2022 - IPC G01B5/24 

FIELD: metrology.

SUBSTANCE: proposed invention relates to the field of ensuring the uniformity of measurements of a plane angle, specifically to geometric measurements; it can be used to determine metrological characteristics of geodesic angle measuring instruments (hereinafter - GAMI), which include theodolites and electronic total stations. A method for transmitting a unit of a plane angle to geodesic angle measuring devices (GAMI) is proposed, in which the measurement error of horizontal and vertical angles to verified GAMI is determined in accordance with the methodology of its verification by successive multiple measurements of control horizontal and vertical plane angles reproduced by collimator telescopes with internal or external focusing, located in horizontal and vertical planes, sighting axes of which intersect at a point coinciding with the intersection of sighting and horizontal axes of verified GAMI. At the same time, to reproduce control horizontal and vertical plane angles, a telescope of the working standard of a plane angle (hereinafter – WSPA) is used, a grid of threads of which is illuminated by a light source through a matte screen, as well as a system of flat mirrors arranged in pairs in horizontal and vertical planes parallel to each other, wherein geometric centers of flat mirrors are equidistant from the intersection line of horizontal and vertical planes, which is a continuation of sighting axes of WSPA and GAMI telescopes.

EFFECT: increase in the accuracy of the transmission of the unit of the plane angle of GAMI in places of their operation, and expansion of the scope of the proposed method.

1 cl, 4 dwg