Calibrating 3D Coordinate Apparatus for Sub-Area Precision
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Solution Overview
Problem
Current apparatuses for pointing spatial coordinates lack accuracy in calibration, particularly when only a subset of the 3D working area is utilized for measurements, leading to suboptimal performance and the need for unnecessary recalibration of the entire working area.
Innovation Solution
The method involves calibrating the apparatus specifically within the actual 3D working area relevant to the particular measurement, using sensors and user input to determine and correct spatial coordinates, allowing for improved accuracy without recalibrating the entire domain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the apparatus is calibrated in the entire predefined 3D working area, then the calibration covers all possible measurement locations, but the calibration process becomes time-consuming and redundant when only a subset of the working area is actually used
Solution Approach 1:
The patent divides the predefined 3D working area into multiple calibration zones based on where measurements are actually performed. Instead of calibrating the entire working area, the system segments the calibration process to focus only on the relevant sub-region, thereby reducing calibration time while maintaining accuracy where it matters.
Solution Approach 2:
The patent applies local quality by performing calibration with higher density and precision in the actual measurement area where the hand-held probe is frequently used, rather than uniformly calibrating the entire working area. This ensures optimal measurement precision in the critical zone while reducing unnecessary calibration efforts elsewhere.
2Adaptability or versatility
If the apparatus performs calibration across the full predefined 3D working area, then all spatial coordinates are covered, but the complexity of the calibration process increases unnecessarily when measurements are confined to a smaller region
Solution Approach 1:
The patent makes the calibration area dynamic by automatically determining the actual measurement area based on where the hand-held probe is used. The calibration region adapts to the specific measurement task, expanding or contracting as needed, which reduces complexity while maintaining versatility across different measurement scenarios.
Solution Approach 2:
The system performs self-calibration by automatically determining the actual measurement area and adjusting the calibration scope accordingly. This self-adapting mechanism reduces the need for manual configuration and simplifies the calibration process while maintaining coverage of the relevant area.
3Loss of time
If the apparatus uses a reduced calibration area based on actual measurement needs, then calibration time is reduced, but the risk increases that the calibration area may not sufficiently cover all measurement points
Solution Approach 1:
The patent implements feedback mechanisms where the system continuously monitors measurement points and automatically adjusts the calibration area to ensure all actual measurement locations are covered. This feedback loop guarantees that the reduced calibration area still provides sufficient coverage reliability by adapting to the actual measurement needs.
Solution Approach 2:
The system performs preliminary determination of the actual measurement area before calibration, using information about where measurements will be taken. This preliminary action ensures that the calibration area is pre-adjusted to cover all necessary points, preventing coverage gaps while maintaining efficiency.
Data Source
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AI summary
A method of calibrating an apparatus for pointing spatial coordinates, wherein said apparatus comprises a moveable hand-held probe, having a pointing tip for pointing at said spatial coordinates, and a portable base unit, wherein said portable base unit is provided with sensors for measuring, in a predefined three dimensional, 3D, working area surrounding said portable base unit, a relative position of said pointed spatial coordinates with respect to said portable base unit, wherein said method comprises the steps of determining an actual 3D working area for a particular measurement, wherein said actual 3D working area is a sub-area of said predefined 3D working area, calibrating said apparatus in said actual 3D working area.