METHOD OF DETERMINATION OF DISPLACEMENTS OF SECTIONS OF LARGE-SIZE STRUCTURES Russian patent published in 1995 - IPC

FIELD: measurement technology. SUBSTANCE: method of measurement of displacement of sections of large-size structures includes installation of radiation source on tested section of structure, positioning of screen with coordinate grid outside of structure and measurement of displacements by position of source images in plane of creen. Source of crusiform shape which radiation is projected on to plane of screen can also be used, straight lines presenting image of source are continued up to crossing with sides of coordinate grid and displacement is determined by translation of image of source center. Torsion angle is judged by angle of inclination of straight lines continuing source image relative to initial position of coordinate grid. EFFECT: provision for simultaneous determination of displacement and torsion angle. 2 dwg