NIR spectroscopy for in-situ wood characterization
Non-destructive fiber optic solutions for in-situ wood characterization
European forestry operations have deployed field-portable NIR systems to evaluate wood quality directly in plantations, enabling selective harvesting based on objective criteria rather than visual inspection alone. IDIL provides portable NIR spectroscopy solutions enabling non-destructive, in-field assessment of wood properties for forestry management, timber quality control, and sustainable resource optimization. IDIL solutions include:
- Backpack-integrated NIR spectrometer systems
- Custom fiber optic probes for surface and core sampling
- Longitudinal measurement probes with depth graduation
- NIR-optimized fiber assemblies
The forestry assessment challenge
Traditional wood quality analysis requires destructive sampling—felling trees, extracting sections, and preparing laboratory samples (powder, chips, or planks). This approach is time-consuming, costly, and prevents real-time decision-making in forest management. Key technical challenges include:
- Sample preparation requirements: Laboratory methods demand processed samples incompatible with standing trees
- Destructive testing: Traditional analysis requires tree felling, preventing quality assessment of growing stock
- Limited spatial data: Point measurements provide no information on growth patterns or historical climate events
- Field deployment: Laboratory equipment cannot operate in outdoor forestry environments
Without portable, non-destructive methods, forestry managers cannot optimize tree selection, predict disease resistance, or assess timber value before harvest.
Probe configuration: 90° measurement geometry with depth graduation
IDIL developed a backpack-portable NIR system combining a compact spectrometer, halogen light source, and custom fiber optic probes enabled in-field measurements on standing trees. The system delivered immediate spectral data correlating with moisture, terpene, and pinosylvine levels, allowing growers to optimize harvest timing and pricing based on measurable quality metrics. Two probe configurations were developed:
- Surface probe: Non-invasive measurements through bark removal, providing instant chemical profiling
- Longitudinal probe: 90° measurement geometry with depth graduation, enabling growth ring analysis similar to dendrochronology—correlating wood chemistry with historical climate data
