METHOD OF LASER 3D SCANNING OF OPERATIVE DEFINITION OF DEFORMATION DEGREE OF STRUCTURE HAVING COMPLEX STRUCTURAL SHAPE Russian patent published in 2015 - IPC G01B11/00 G02B26/10 

Abstract RU 2572055 C1

FIELD: construction.

SUBSTANCE: method includes performance of measurements with high speed (from several thousands to million points per second) of the distance from a scanner to the structure surface, having a complex structural shape, and registration of appropriate directions (vertical and horizontal angles) with subsequent generation of a 3D image of a 3D model of the structure having complex structural shape, representing a swarm of points {Xi, Yi, Zi, i=1, n}. To detect deformations by the swarm of points, some horizontal and vertical sections of the 3D model are built, a map of deviations is built, as well as schedules of wall deviation from the perfect wall vertical plane, according to the formed numerical map of deviations, they build a map of isolines, a colour tone map, surface charts, a shadow chart; to build colour tone maps of deviations they use a scale of indents colouring - from dark blue to blue, bulges - from yellow to dark brown. Vertical scale of deviation charts is selected such that microirregularities of the wall may be visually represented, and cross section of the map of isolines of deviations is selected in the model building error of 3 mm. If the structure has complex shape with curves, then the surface, relative to which deviation from the vertical line is explored, is the tangent to the curve, the vertical plane with azimuth 0°. At the same time detection of defects in construction and initial phase of deformation process is carried out by results of comparison of actual deviations and relative bending deformations with regulatory deviations and critical values of deformations of the structure having complex structural shape.

EFFECT: expansion of operational capabilities of the method for efficient detection of degree of deformation in a structure having complex structural shape.

4 dwg

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RU 2 572 055 C1

Authors

Medvedev Oleg Anatol'Evich

Tarakanov Andrej Jur'Evich

Dates

2015-12-27Published

2014-10-27Filed