Optoelectronic information-measuring systems for determining the absolute position of an object

Abstract

Background. Currently, during the modernization of domestic rocket, space and aviation equipment (RS and AE), special attention is paid to the accuracy of manufacturing large-sized body parts that are part of responsible products. The accuracy of manufacturing large-sized parts is determined by minimizing dimensional tolerances, as well as the measuring instruments used for this. The object of the study is optical-electronic informationmeasuring systems (OEIMS) for determining the linear dimensions of large-sized parts of objects of RS and AE and determining the absolute position of the measured object in space. The subject of the research is scientific and technical solutions for determining the design parameters and connections of optical and electrical circuits, providing the creation of OEIMS with the determination of the absolute position of the measured object in space when measuring the linear dimensions of large-sized products. The purpose of the research is to increase the measurement accuracy and reliability of the linear dimensions of largesized body parts of RS and AE products by improving the optical system of OEIMS and developing new methods for determining the absolute position of the measured object in space. Materials and methods. During the research, the theory of accuracy of measuring systems, mathematical analysis, integral and differential calculus, methods of geometric optics, mathematical processing of the results obtained, modeling and graphical constructions in the programs Microsoft Office, Libre Office, MathCAD, SolidWorks, the provisions of the theory of measurements were used. Results. A method for determining spatial points has been developed that reduces the accumulated measurement error, characterized in that the optical beams are separated by polarization and frequency, with one optical beam passing along vertical and the other along horizontal polarization, the absolute value of the phase difference of the two optical measuring signals determines the absolute position of the object in space. The structure of OEIMS with acousto-optic conversion of optical signals implementing the proposed method is determined. Conclusions. Based on the proposed method for determining spatial points, an OEIMS with increased accuracy of measurement results has been developed to determine the absolute position of the measured object in space when measuring linear displacements during the manufacture of large-sized body parts of aircraft.

Keywords

• information-measuring system
• optoelectronic device
• error
• large-sized part
• absolute position
• spatial point
• acousto-optic modulator