一种空间多自由度位姿视觉超精密测量系统与方法

By using a spatial multi-degree-of-freedom pose vision ultra-precision measurement system, and employing binocular stereo vision and related algorithms, the contradiction between measurement accuracy, degrees of freedom, and range in existing technologies has been resolved, and six-degree-of-freedom ultra-precision measurement has been achieved.

CN121163371BActive Publication Date: 2026-07-17SOUTH CHINA UNIV OF TECH

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Filing Date
2025-09-11
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing visual measurement methods suffer from a contradiction between measurement accuracy, measurement degrees of freedom, and measurement range in ultra-precision measurement, especially in achieving complete six degrees of freedom and a large measurement space.

Method used

A spatial multi-degree-of-freedom pose vision ultra-precision measurement system is adopted, including a main industrial camera, multiple auxiliary industrial cameras, a lens fixing bracket, a marking device, and a precision motion device. Through binocular stereo vision and related algorithms, in-plane measurement under the telecentric lens is extended to achieve six-degree-of-freedom ultra-precision measurement.

Benefits of technology

It achieves a larger common measurement range and depth of field, and can complete a full six-degree-of-freedom ultra-precision measurement, improving measurement accuracy and degrees of freedom.

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Abstract

本发明公开了一种空间多自由度位姿视觉超精密测量系统与方法,该系统主要由多目成像系统和位姿测量算法组成,在多目成像系统中,镜头选择低畸变的远心镜头,辅助工业相机分布在主工业相机周围,从而差分成多组双目系统,以扩大测量范围,在位姿测量算法中,将印有任意标记图案的标记板固定于目标平面上,并通过与观测到的标记图案相对应的位姿测量算法提取位姿。由于远心镜头的平行投影特性,至多实现五自由度的位姿测量,因此最后还需再利用双目系统提供的互补的信息得到第六个自由度,从而实现空间六自由度的超精密测量。本发明可用于精密测量与机器人领域,通过选配合适的相机与镜头并结合所提算法,可实现空间多自由度位姿的视觉超精密测量。
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