Blueberries present a grading challenge that goes far beyond simple defect removal — subtle quality variations in color, size, softness, and dehydration directly determine which market channel each berry serves. From premium fresh-pack berries destined for supermarket shelves to IQF fruit and processing-grade raw material, the difference between top-tier revenue and lower-value applications often comes down to sorting precision. For processors serving multiple market channels, intelligent multi-spectral sorting is the key to optimally allocating every berry to its highest-value destination — not just removing defects, but unlocking the full commercial potential of every batch.
The Demeter B Series is an intelligent multi-spectral sorting system custom-designed for premium blueberry industrial grading and quality control. Featuring 360° on-roller inspection and multi-array (4 or 8) sorting through cutting-edge hyper-spectral imaging (HSI) and high-resolution RGB (HR-RGB) imaging technology powered by proprietary AI algorithms, the system delivers up to 16 distinct grade classifications based on color, size, softness, and dehydration in a single pass — maximizing processing efficiency without compromising sorting precision.
AI-driven surface defect recognition algorithms — trained on real-world production data using deep learning, with sorting precision refined continuously — ensure consistently high classification accuracy across diverse blueberry conditions — helping processors maximize the value of every berry, minimize costly misgrading, and deliver premium-grade blueberries with unmatched confidence.
Applications
Technical Features
● Custom-Designed Optical Grading System for Premium Blueberry
✦ Engineered exclusively for gentle handling of delicate blueberries, custom rollers optimize both bloom protection and processing capacity
✦ Conveyor roller system performs individual scanning and analysis of each blueberry for precision grading based on preset standards and parameters
✦ High-capacity feeding system ensures uniform and stable blueberry distribution, precisely positioning each fruit onto the roller sorting system to eliminate inspection interference while reducing bloom loss and maintaining grading accuracy
● AI Powered Ultra-High-Precision Defect Inspection System
✦ Proprietary AI algorithms enhance defect detection, with models retrainable on real-world production data via deep learning.
✦ Hyper-Spectral Imaging System captures spectral signatures for each pixel, detecting bruising, decay, unripe fruit, and foreign materials invisible to standard cameras.
✦ High-Stability Halogen Lighting System provides consistent, full-spectrum illumination for the hyper-spectral sensor, with air-cooling ensuring stable output and extended lamp life.
✦ High-Resolution RGB Camera System delivers precise surface imagery, detecting size irregularities, stem scars, blemishes, and color deviations.
✦ Ring Lighting Shadow-free Illumination System delivers uniform, shadow-free lighting from all directions, eliminating dark spots caused by fruit contours and ensuring consistent image quality.
✦ Unprecedented ultra-high-precision detection of a wide range of defects in blueberries based on surface features:
✩ Color grading: Separation by ripeness (dark/light blue/unripe) for uniform appearance
✩ Size grading: Sorting by diameter (e.g., 12mm+ for premium berries)
✩ Defect detection: Mold, shriveled, cracked, or scarred berries
✩ Soft berry detection: Internal water/sugar analysis
● High-Performance Air Ejector System
✦ Engineered for enhanced durability, optimized speed and air consumption
✦ Accurate rejection and reliable performance at high-capacity sorting
✦ Significant reduction in false rejection rate and total cost of ownership
● 15-Inch Industrial Touchscreen Control Panel
✦ Intuitive HMI with multilingual support
✦ Instant switching between product profiles
✦ Comprehensive remote support system
✩ Remote Access and Monitoring
✩ Real-time Performance Dashboard
✩ Live Expert Diagnosis
✩ Interactive Troubleshooting
