External Sensor Feedback for Drift-Corrected Machine Positioning
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Solution Overview
Problem
Machining systems face challenges with positional accuracy over time due to drift and mechanical limitations, requiring frequent recalibration and replacement of tracking devices, which is costly and disruptive to operations.
Innovation Solution
A real-time enhanced positioning system utilizing multiple sensors such as inertial measurement units, laser trackers, and cameras to provide precise positional corrections through a feedback loop, allowing continuous operation without the need for frequent recalibration by integrating and synchronizing data streams for improved accuracy across seven degrees of freedom.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional tracking devices are used in machining systems, then the machine can perform positioning operations, but the precision drifts over time and requires frequent recalibration
Solution Approach 1:
The system continuously measures the actual position of the machine tool using external tracking devices and compares it with the programmed position, then automatically applies correction values to compensate for drift. This real-time feedback mechanism eliminates the need for manual recalibration interruptions while maintaining positioning precision throughout operation.
Solution Approach 2:
The machining system performs self-correction by automatically applying position compensation based on measured deviations. The system monitors its own positioning accuracy and adjusts its operations without external intervention, eliminating the need for operator involvement in recalibration processes.
2Measurement precision
If integrated tracking devices are used to improve precision, then positioning accuracy is enhanced, but the cost of replacing aging equipment increases
Solution Approach 1:
Instead of integrating expensive tracking devices into the machine tool itself, the system uses external tracking devices that monitor the machine's position from outside. These intermediary devices provide the necessary measurement precision without requiring costly integration or modification of the machine tool, reducing replacement costs when tracking devices age.
Solution Approach 2:
The system creates a virtual model of the machine tool's position through external tracking and uses this copied position information to calculate corrections. This approach allows precise positioning measurement without physically integrating tracking components into the machine, avoiding the high costs associated with integrated device replacement.
3Manufacturing precision
If manual calibration procedures are performed to correct positioning drift, then precision is restored, but operational productivity decreases
Solution Approach 1:
The system maintains continuous positioning correction throughout the machining operation without interruption. The real-time measurement and automatic compensation enable the machine to maintain precision throughout continuous operation, eliminating the stop-start nature of manual calibration and maximizing productivity.
Solution Approach 2:
The continuous feedback loop automatically detects and corrects positioning drift during operation, eliminating the need to stop production for recalibration. This maintains both precision and productivity simultaneously by making correction an uninterrupted background process.
Data Source
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AI summary
Systems and methods for machine positioning are provided herein. Exemplary embodiments include systems and methods using external positional information of an object under observation to compare to a programmed position of the object under observation. The comparison may be used in different manners including, for example, course correction, future path planning, object avoidance, etc.