Calibration Standard for Coordinate Measuring Machines
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Solution Overview
Problem
Existing calibration standards for coordinate measuring machines are not optimal, particularly in terms of positioning and suitability for different magnifications and optical sensors, as per international standard ISO/FDIS 10360-7.
Innovation Solution
A calibration standard with a permanent calibration structure featuring multiple intersecting axes, each running over identically configured portions with varying optical properties, allowing for universal usability and high accuracy calibration, suitable for different magnifications and capable of being positioned easily with respect to a coordinate measuring machine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a calibration standard with multiple intersecting axes and identically configured portions is used, then measurement precision and adaptability are improved, but device complexity increases
Solution Approach 1:
The calibration standard is divided into multiple identical portions (first portions) arranged along intersecting axes. Each portion contains the same calibration features (circles, lines, or other geometric elements), allowing the system to provide multiple measurement opportunities without increasing the complexity of individual portions. This segmentation enables comprehensive calibration while maintaining simple, repeatable structures.
Solution Approach 2:
The calibration standard uses identically configured portions that can serve multiple functions: calibration at different magnifications, calibration of different optical sensors, and verification of measurement consistency across multiple axes. The same structural design serves universal calibration purposes, reducing the need for multiple different calibration artifacts.
2Adaptability or versatility
If a calibration standard suitable for different magnifications is used, then adaptability is improved, but positioning difficulty increases
Solution Approach 1:
Each portion of the calibration standard contains calibration features (such as circles or lines) with specific local characteristics that can be clearly identified and positioned. The identical configuration across portions ensures that the same positioning methods work consistently at different magnifications, making the system adaptable while maintaining ease of positioning.
Solution Approach 2:
The calibration standard is pre-configured with multiple identically arranged portions along intersecting axes, so that when positioned once, it automatically provides calibration references for multiple magnifications and orientations. This preliminary arrangement eliminates the need for repeated positioning adjustments when changing magnifications.
3Measurement precision
If multiple adjacent zones with different optical properties are included, then measurement precision is improved, but device complexity increases
Solution Approach 1:
Each calibration portion is segmented into multiple adjacent zones with different optical properties (reflective, absorptive, transparent). This segmentation within each portion provides multiple reference points for probing deviation testing, improving measurement precision while keeping the overall structure modular and manageable.
Solution Approach 2:
Different zones within each portion have specific local optical properties tailored for different measurement aspects. The reflective zones provide clear edge detection, absorptive zones provide contrast references, and transparent zones allow transmission measurements. This local differentiation improves precision without requiring complex overall design.
Data Source
AI summary
A standard for calibrating a coordinate measuring machine includes a main body with a permanent calibration structure. The calibration structure includes a first arrangement. The first arrangement is configured in such a way that three axes of a projection of the first arrangement on a plane, the axes intersecting at a common point, each run over an identically configured first portion. The first portions are each delimited by the common point on one side. The identically configured first portions each have n zones. Directly adjacent zones differ in one optical property. In various implementations, n is greater than or equal to 3.