Legende HDF Plus Series AI Optical Sorting System

IQF (Individually Quick Frozen) vegetables and fruit face a unique set of sorting challenges that set them apart from fresh produce. Products are handled in low-temperature environments, where prolonged manual work leads to physical exhaustion and high missed defect rates. Frost accumulation and sticking obscure discoloration, black spots, and mold are nearly impossible to detect by conventional methods. Frozen clumps and poorly separated defective pieces, issues unique to the IQF scenario, further compound the difficulty. Traditional approaches fall short: manual sorting is labor-intensive and quality-unstable in cold environments; air screening and specific gravity separation rely solely on size, weight, and density, completely unable to identify color abnormalities, surface defects, or foreign materials.

The Legende HDF Plus Series is an intelligent, vision-based sorting system custom-designed for premium IQF vegetables and fruit industrial sorting and quality control, engineered to the highest hygiene standards. Leveraging ultra-high-resolution RGB imaging technology powered by proprietary AI algorithms, the system adapts to the unique characteristics of IQF bulk materials — effectively identifying defects even under frost coverage through deep learning, distinguishing same-color contaminants through shape, texture, and edge analysis, and intelligently identifying frozen clumps and poorly separated defective pieces. Using high-speed visual inspection and precise ejection, the system efficiently sorts color variations, surface defects, foreign materials, and frozen clumps, improving finished-product consistency and providing a more efficient, reliable, and quantifiable solution for IQF vegetables and fruit sorting.

AI-driven surface defect recognition algorithms — trained on real-world production data using deep learning, with sorting precision refined continuously — help processors enhance product quality, increase throughput, reduce labor costs and deliver premium-quality frozen produce to market.

Applications

Technical Features

● Custom-Designed Optical Sorting System for Premium IQF Vegetables and Fruit

✦ Compact dual-belt sorting system with quick-install and simultaneous re-sorting design

✩ Primary sorting occurs on higher-level belt and aggressively removes all potential defects (may include false rejects)

✩ Secondary sorting on lower-level belt receives rejects from primary sorting for false-reject recovery

✦ Multiple high-capacity waterproof vibratory feeding systems are available, customizable for different IQF vegetables and fruit to ensure single-layer distribution and minimize overlapping

✦ Reinforced food-grade stainless steel structure and sealed scanning/control enclosures withstand frequent high-pressure washing and sterilization

✦ Design of quick belt change and round tube frame minimizes sanitation dead zones and ensures convenient routine maintenance and cleaning, meeting higher food safety and hygiene standards

✦ Integrated humidity control system maintains consistent performance and minimizes downtime

✦ Available in two models with belt widths of 1200mm and 1800mm, providing processors greater flexibility to match different throughput requirements

● 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

✦ Ultra-High-Resolution RGB (UHR-RGB) imaging technology reveals subtle defects invisible to human eyes

✦ High-Intensity LED Illumination System ensures clear and stable imaging

✦ Ultra-high-precision detection of a wide range of defects in IQF vegetables and fruit based on surface features:

✩ Color Defects: Discoloration, mold, rot

✩ Shape Defects: Misshapen, deformed, oversized, undersized, broken

✩ Surface Damage: Bruises, cuts, abrasions, crushing, scars, cracks, shriveling

✩ Biological Contaminants: Insect damage, leaf/stem residues, other vegetable debris, soil clumps

✩ Foreign Materials: Stones, plastic/rubber fragments, wood chips

● 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

✦ Superior Product Quality

Ultra-high-resolution RGB imaging combined with AI-driven defect recognition detects subtle color variations, shape irregularities, and surface defects that are difficult to identify through manual inspection, ensuring only premium-grade IQF vegetables and fruit reach the market.

✦ Enhanced Food Safety

Reliably identifies and removes foreign materials — including plastic, glass, metal, stones, and extraneous vegetable matter — safeguarding product integrity and reducing contamination risks.

✦ Significantly Higher Throughput

Automated high-speed sorting operates continuously at capacities far exceeding manual sorting, enabling processors to meet demanding production schedules without compromising quality.

✦ Reduced Labor Dependency

Replaces labor-intensive manual sorting stations, lowering operational costs and addressing workforce shortages common in food processing facilities.

✦ Lower Product Loss

AI-optimized detection algorithms minimize false rejection rates, preserving more saleable product and maximizing yield compared to conventional sorting methods.

✦ Consistent Batch-to-Batch Quality

Deep learning models trained on real-world production data deliver repeatable sorting performance, eliminating human variability and ensuring uniform quality across every production run.

✦ Flexible Product Handling

Recipe-driven configuration allows instant switching between different IQF product types — sliced, diced, or mixed — without lengthy recalibration, supporting high-changeover production environments.

✦ Hygienic Design for Demanding Environments

Food-grade construction and sealed components meet the stringent hygiene standards required in IQF vegetables and fruit processing, minimizing contamination risks and simplifying cleaning procedures.

Specifications