Coordinate Measuring Trajectory Adaptation for Workpiece Misalignment
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Solution Overview
Problem
Coordinate measuring machines often fail to accurately measure work pieces when they are not in the expected orientation, leading to potential damage to the machine or the work piece, as they blindly execute pre-defined trajectories without adjusting for misalignment.
Innovation Solution
A system that includes a trajectory module to store and control a measuring probe along an established measurement trajectory, analyzes actual trajectories relative to the pre-defined one, and generates a revised trajectory by shifting target points to match the work piece's orientation, allowing the machine to continue measuring without restarting the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the coordinate measuring machine executes a pre-defined measurement trajectory, then the measurement process is efficient and optimized, but the machine cannot adapt to work pieces that are not in the expected orientation, leading to measurement failure or damage
Solution Approach 1:
The patent implements dynamic trajectory adaptation by continuously monitoring actual measurements against expected trajectory points and automatically adjusting subsequent measurement points in real-time. This allows the measurement system to transition from a static, pre-defined trajectory to a dynamic, adaptive trajectory that responds to actual work piece orientation, resolving the contradiction between maintaining measurement efficiency and adapting to orientation variations.
Solution Approach 2:
The system employs feedback mechanisms by comparing actual measurements with expected trajectory points and using this information to generate corrected trajectory points. This closed-loop feedback process enables the machine to detect orientation deviations and automatically compensate by adjusting the measurement trajectory, thereby maintaining both measurement efficiency and adaptability to different work piece orientations.
2Loss of time
If the coordinate measuring machine blindly executes moves and measurements according to a pre-defined trajectory, then the measurement process is simple and fast, but the machine risks contacting the work piece in undesirable ways, potentially causing damage
Solution Approach 1:
The patent applies preliminary anti-action by proactively detecting trajectory deviations through continuous monitoring of actual measurements and preemptively correcting the measurement trajectory before harmful contact occurs. The system calculates corrected trajectory points that steer the measuring probe away from potential collision paths while maintaining measurement objectives, thus preventing damage before it can happen.
Solution Approach 2:
The feedback mechanism continuously monitors the actual trajectory against the expected trajectory and automatically generates corrective actions. This real-time feedback loop enables the system to detect when the work piece orientation deviates from expectations and adjust the measurement path accordingly, preventing harmful contact while maintaining measurement efficiency.
3Measurement precision
If the coordinate measuring machine detects work piece misalignment and restarts the measurement process, then measurement accuracy is maintained, but significant time is lost due to re-execution of the entire trajectory
Solution Approach 1:
The patent segments the measurement trajectory into individual measurement points and corrects them individually based on detected deviations. Instead of restarting the entire measurement process, the system identifies which specific trajectory points need correction and adjusts only those segments, thereby maintaining measurement accuracy while minimizing time loss by preserving the portions of the trajectory that remain valid.
Solution Approach 2:
The system performs preliminary correction calculations on the trajectory points based on detected work piece orientation deviations. By pre-calculating corrected trajectory points before executing the measurement, the system ensures measurement accuracy is maintained without needing to restart the process, as the corrections are already incorporated into the measurement path.
Data Source
AI summary
A coordinate measuring machine revises its original measurement trajectory, prior to completing its measurement of a work piece, upon detecting misalignment between its original measurement trajectory and the orientation of the work piece.