Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Electromechanical System for Basing Projection Optical-Electronic Measuring Converters A.N. SHILIN, D.G. SNITSARUK, N.S. KUZNETSOV Relevance of the problem: the accuracy of projection measurements with the help of optoelectronic measuring transducers is most infl uenced by the accuracy of positioning the transducer relative to the object. The values of the basic methodological errors depend on the accuracy of the basing: the discretization error, the error of the radial distortion of the objective, the error of perspective distortions and the error of eccentricity. Currently, in projection measurements, the transmitter is set manually. An example of manual referencing are measurements with a theodolite, or referencing with a coordinate table. The disadvantages of manual basing are obvious: the infl uence of the human factor, the impossibility of automating the control process, low productivity of the measurement process. To solve this problem, “smart” electromechanical systems are perfect, allowing you to get rid of all the disadvantages of manual basing, as well as to expand the functionality of the measuring system. Purpose of the work: development of an electromechanical system that allows for the basing of a projection opticalelectronic measuring transducer (for example, a digital camera) with high accuracy in automatic mode, providing guidance to the center of the measurement object. The proposed system consists of two groups of electromechanical drives. The first group provides the basing of the center of the registered projection relative to the center of the measured object. The second group is necessary for the planar basing of the measuring transducer, ensuring the parallelism of the plane of the recorded projection and the frontal plane of the measured object. Practical application: the use of the proposed electromechanical system is possible in industries that require automatic control of the geometric parameters of symmetric parts in a noncontact manner, for example, in the production of large-sized shells of revolution. Keywords: control of geometric parameters, projection measurement, electromechanical system, basing algorithm, SEMS. DOI: 10.25791/pribor.3.2021.1249 Pp. 47-54.