Calibration method of standard cylinder curved surface point measurement equipment

Abstract

The invention provides a calibration method of standard cylinder curved surface point measurement equipment, which includes: based on pose tracking and distance measurement, measuring a point on the upper surface of a cylinder under the condition that the pose of a reference ball and distance sensor assembly is not changed, and performing point measurement by moving a large angle along the side surface of the cylinder; enabling the measuring points to respectively fit a plane and a circumference, and calculating an optical axis direction U of the distance sensor under a reference spherical coordinate system TaCS and a coordinate Q of a coordinate system TCS original point of the distance sensor in the coordinate system TaCS, so that a subsequent calibration calculation process is simpler;the problem that the relative position relation between the distance sensor and the calibration reference ball is accurately obtained when manufacturing and assembling errors exist is solved. According to the invention, the standard cylinder with low price is adopted to acquire the position of the positioning device and the distance of the distance sensor, thereby saving the calibration cost; theassembly size relation of the two sensors is accurately calculated, the universality is enough, and the factory machining efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of space point precision measurement, and in particular relates to a calibration method of a standard cylinder curved surface point measurement device. Background technique [0002] Modern processing tends to be large-scale integration and high automation, and the shape of products is more diverse, which has higher requirements for the accuracy and automation of measuring equipment. [0003] Traditional measurement techniques are mainly divided into contact measurement and non-contact measurement. In contact measurement, three-coordinate measuring machines are widely used, mainly through direct contact between the measuring element and the surface to be measured to obtain measurement data, but there are disadvantages such as slow measurement speed, low measurement data density, easy wear of the probe, and easy damage to the surface of the workpiece. Non-contact measurement mostly uses machine vision technol...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a calibration method for standard cylinder surface point measurement equipment, which is used to solve the problem of accurately obtaining the relative positional relationship between the distance sensor and the fixed reference sphere when there are manufacturing and assembly errors

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