FIELD: measuring equipment.
SUBSTANCE: placing a product on a table with standard rotation without precise centring, determining coordinates of section profile points relative to rotation axis by means of a sensor by iterative method, according to amplitude minimisation criterion of a first harmonic of next approximation of section profile in its angular coordinates, determining by taking into account known displacement of sensor measuring axis relative to rotation axis the center eccentricity of medial circumference section and its phase, calculating the radii connecting the section profile points with center of its medial circumference in function of table turn angle, brining obtained radii to angular coordinates of cross-section profile points. The coordinates of section profile points relative to rotation axis are determined for three different locations of the product relative to the table. For each arrangement of the product by iterative method, according to amplitude minimisation criterion of a first harmonic of next approximation of section profile in its angular coordinates, their phases and amplitudes of selected harmonic of profile spectrum with different combinations of displacements of sensor measuring axis and its base relative to rotation axis, selected from specified ranges of possible values of said displacements, by iterative method from obtained set of combinations of selected harmonic amplitudes for profile spectrum and possible values of displacements by equality criterion of their respective values for one section in three different locations of specified displacements are determined. The corresponding eccentricity values of center medial circumference are determined from found displacements for any of said locations, its phases and radii describing section profile in its angular coordinates.
EFFECT: increased cross-section measurement accuracy on roundness measurement instruments at high effectiveness, decreased requirements for fabrication accuracy of elements of roundness measurement instrument design, increased accuracy for adjustment of instrument measuring axes, decreased requirements for its operating conditions.
1 dwg
