3D Calibration Field for Error Calibration of Portable Articulated Coordinate Measuring Machine

Abstract

The invention discloses a 3D calibration field for portable articulated coordinate measuring machine error calibration. The 3D calibration field includes a granite base, the top of the granite base is provided with a connecting seat, the top of the granite base is vertically provided with four first rod members, four second rod members and six third rod members, the four first rod members are distributed in a square form to form a first square, the four second rod members are distributed in a square form to form a second square, the six third rod members are distributed in a regular hexagonal form to form a regular hexagon, the first square, the second square, and the regular hexagon take the center of the connecting seat as the center, and one of the diagonal lines of the regular hexagon is superposed with one of the diagonal lines of the first square. When the 3D calibration field evaluates the measurement performance of a portable articulated coordinate measuring machine without the need for changing the attitude of the length standard amount, and the fitting error can be prevented from being introduced into the measurement process.

Description

Technical field [0001] The invention relates to the field of calibration devices for portable articulated coordinate measuring machines, in particular to a 3D calibration field for error calibration of portable articulated coordinate measuring machines. Background technique [0002] The portable articulated coordinate measuring machine is a non-orthogonal three-coordinate measuring instrument composed of 3 pairs of mutually perpendicular rotary joints connected in series via rods. In the actual use process, the measurement performance of the portable articulated coordinate measuring machine needs to be periodically verified by a third-party measurement agency to evaluate whether the reliability of the measurement results can meet the needs of the measurement task. The current portable articulated coordinate measuring machine performance standards mainly include ASME B89.4.22-2004, VDI / VDE 2617-9, ISO1010360-2:2009 and ISO 10360-12. The standard uses gauge block groups, step gauge...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a 3D calibration field for error calibration of a portable joint-type coordinate measuring machine, so as to solve the problem that the standard parts in the prior art calibration need to change the pose of the standard parts in its measurement space and the pose distribution has a certain randomness. There are too few standard quantities of different lengths, the problem of easy introduction of fitting errors, and the problem of not being able to evaluate the measurement performance of the portable articulated coordinate measuring machine in its measurement space

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