Baffled Geological Sample Holder for Field Scanner Calibration
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Solution Overview
Problem
Existing geological sample calibration methods using known reflectance targets are costly, difficult to deploy in non-laboratory conditions due to dust accumulation, and only calibrate sensor characteristics without validating atmospheric correction algorithms.
Innovation Solution
A geological sample holder with baffles and a container that maintains the sample upright, mimicking a rock wall, allowing for improved calibration and validation of mobile scanners in the field, including a system with a scanner and light source for scanning at various angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If known reflectance targets (Spectralon) are used for calibration, then sensor characteristics can be calibrated, but the cost to manufacture is high and they are difficult to deploy in non-laboratory conditions
Solution Approach 1:
The patent replaces expensive, fragile Spectralon panels with inexpensive, robust geological samples that can be easily deployed in field conditions. The samples are contained in simple holders with baffles, creating a disposable or easily replaceable calibration target that does not require laboratory conditions or careful handling.
Solution Approach 2:
The patent creates a simplified copy of real mining conditions by using geological samples in upright holders with baffles that mimic rock walls. This allows field calibration that replicates actual operating conditions rather than using idealized laboratory targets.
2Measurement precision
If known reflectance targets are used, then sensor calibration is possible, but atmospheric correction algorithms cannot be validated
Solution Approach 1:
The geological sample holder system serves multiple functions: it calibrates sensor characteristics and simultaneously validates atmospheric correction algorithms. The upright configuration with baffles creates realistic mining conditions that enable comprehensive algorithm validation beyond what flat Spectralon panels can provide.
3Measurement precision
If flat calibration panels are used, then sensor calibration is achieved, but the results do not validate atmospheric correction algorithms for field scanning
Solution Approach 1:
The patent introduces local quality variations through the baffle structure and upright sample configuration, creating realistic shadows, reflections, and geometric conditions that match field scanning. This local complexity enables validation of atmospheric correction algorithms under conditions that replicate actual mining environments.
Solution Approach 2:
Instead of using flat panels on the ground, the patent inverts the approach by placing samples upright with baffles, mimicking vertical rock walls. This inversion creates realistic scanning geometry and light interactions that validate algorithms for field conditions rather than laboratory conditions.
Data Source
AI summary
The present invention relates to a geological sample holder. The holder includes a container for containing a geological sample and for orienting in an upright configuration. One or more baffles extend across the container and baffle the geological sample. Advantageously, the sample holder may be angled to the horizontal for scanning, and the baffles baffle the geological sample from shifting downwards.