Coordinate Measuring Machine Probe Displacement Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Coordinate measuring machines face increased measurement errors when measurement conditions change, as they struggle to properly correct probe displacements due to differences in push amount and measurement direction during profiling and calibration.
Innovation Solution
Incorporating a correction parameter calculator that calculates and applies correction parameters based on real-time measurement conditions, including push amount and measurement direction, to accurately correct probe displacements in three orthogonal planes, thereby reducing measurement errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If predetermined correction parameters are used to correct probe displacement, then measurement error is reduced under specific measurement conditions, but measurement error increases when measurement conditions change
Solution Approach 1:
The correction parameters are made dynamic by calculating them in real-time based on current measurement conditions (push amount and measurement direction) rather than using fixed predetermined values. The correction parameter calculator continuously adapts the correction parameters to match the actual measurement conditions, ensuring accurate probe displacement correction across varying conditions.
Solution Approach 2:
The system changes the parameters used for correction by calculating correction parameters based on real-time measurement conditions (push amount and measurement direction) rather than using fixed predetermined parameters. This allows the correction model to adapt to different measurement scenarios and maintain accuracy across diverse conditions.
2Measurement precision
If correction parameters are calculated based on specific measurement conditions, then probe displacement is accurately corrected under those conditions, but the system becomes more complex
Solution Approach 1:
The correction parameter calculator automatically calculates correction parameters based on real-time measurement conditions without requiring manual intervention or complex external calibration procedures. The system self-adjusts by using the current push amount and measurement direction to compute appropriate correction parameters, simplifying the overall process while maintaining accuracy.
Solution Approach 2:
The system implements feedback by continuously monitoring measurement conditions (push amount and measurement direction) and using this information to calculate and update correction parameters in real-time. This closed-loop approach ensures that the correction parameters always reflect the current measurement state, improving accuracy while keeping the system manageable through automated feedback mechanisms.
Data Source
AI summary
A coordinate measuring machine includes: a probe that has a contact point capable of movement within a predetermined range; a movement mechanism for moving the probe; and a controller for controlling the movement mechanism. The controller has a measurement value calculating unit for calculating a position of the contact point based on a displacement of the movement mechanism and a displacement of the probe. The measurement value calculating unit includes: a correction parameter calculator for calculating a correction parameter for correcting the displacement of the probe based on a measurement condition in measuring an object; a corrector for correcting the displacement of the probe based on the correction parameter; and a displacement synthesizing unit that synthesizes the displacement of the movement mechanism and the displacement of the probe corrected by the corrector to calculate the position of the contact point.