Method for measuring space rotating curved surface with microdelta barycentric coordinates as objective point

Abstract

The invention discloses a space rotation surface measurement method by using a micro triangle gravity coordinate as an object point. The method comprises the steps of: constructing a coordinate system according to the space rotation surface; determining the measurement range of the space rotation surface; and selecting a plurality of polar radii Rs in the range; aiming at each polar radius R, constructing a plurality of micro triangles to calculate the plane normal vector, and calculating the gravity coordinates, and the gravity is regarded as an object point, using sub-degree method to measure each curve in the space rotation surface; generating datum file consistent with the professional software to read; and analyzing the value range of the equilateral triangle height d through the standard ball experiment. Adopting the method that the gravity coordinates are regarded as the object point can measure the space rotation surface, and the measuring precision is high.

Description

technical field [0001] The invention relates to the field of automatic measurement of curved surfaces in space, in particular to a method for measuring curved surfaces of rotation in space. The present invention is applicable to the measurement and reverse engineering of space rotating curved surfaces contained in parts of tobacco machinery such as space cams and blades; it is also applicable to the measurement and reverse engineering of impeller and blade contour surfaces in the fields of aerospace, automobile manufacturing and machinery manufacturing in my country. engineering etc. Background technique [0002] It is difficult to complete the precise measurement of the spatial surface contour with the trigger probe on the three-coordinate measuring machine. The manual measurement mode must be designed, and the measurement program must be designed. line for compensation measurement. [0003] In real production and life, spatial rotating surfaces have a wide range of applic...

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Problems solved by technology

[0005] In the three-coordinate measurement technology, if the radius compensation of the stylus is activated, the measurement theory requires the stylus to approach the measurement along the normal vector of the measured point, otherwise measurement errors or wrong measurement results will occur

[0006] To sum up, the measurement of spatial rotating surfaces is difficult in the field of three-coordinate measurement, and it is called one of the key technologies in geometric quantity testing. As a three-coordinate measurement commodity software, no relevant applications have been found in China at present. or report

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