On-the-go Caliper and Counter Device for Shade and Fruit Tree Nursery Inventory Management

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  • 83 to 87% accuracy
  • On-the-go Caliper and Counter Device for Shade and Fruit Tree Nursery Inventory Management

    1. 1. On-the-go Caliper andCounter Device for Shade andFruit Tree Nursery Inventory Management J.S. Owen Jr., W. Shi, S. Singh, H.M. Stoven, K. Lewis
    2. 2. Seasonal Counts for Inventory Images by Jim Robbins
    3. 3. Automation of InventoryProcesses for Nurseries Dr. James Robbins – Extension Specialist Image by Jim Robbins
    4. 4. Caliper as an Estimate of Grade Tallymaster – 2003
    5. 5. On-the-Fly Tree CaliperMeasurement 2 Class 3 lasers, 60 Hertz camera
    6. 6. On-the-Fly Tree CaliperMeasurement Capture multiple frames per tree at varying angles
    7. 7. Caliper 2 Class 3 lasers Caliper estimation at 60 times per second (60 Hz)  Filtered from light Algorithm incorporated to process staked trees Caliper measured at:  distance of 10 to 20” from tree  6” (±2”) above the graft union or soil travelling 3 mph
    8. 8. Field Caliper GUI User can specify if stakes are used and diameter of stake Reports optimum measuring distance range and maximum allowed traveling speed to ensure adequate estimates per tree (approx. 12)
    9. 9. Unstaked Tree Accuracy +/- 2.5mm
    10. 10. Unstaked Tree Accuracy 200 Caliper Ests Manual Utool 180 160Number of trees 140 120 100 80 60 40 20 0 4 5 6 7 More Nursery tree grade
    11. 11. Staked Tree Accuracy
    12. 12. Staked Tree Accuracy
    13. 13. Staked Tree Accuracy Limitation for staked trees  Need to know the caliper of the stake  Caliper of stake and tree must be significantly different (ratio of stake caliper to tree caliper)  Left figure shows stakes deemed acceptable, right figure shows stakes that are not viable.
    14. 14. Counter Software Graphic User Interface to include user input, pausing and saving data
    15. 15. On-the-Fly Tree Counter J frank Schmidt, OR - 45 Sergeant crabapples travelling < 3 mph. Trees were counted 5 times with an average accuracy of 97% Willow Drive Nursery, WA - 20 apple small caliper seedlings travelling approx 2 mph. Trees were counted 10 times with an average accuracy of 95%. At Dave Wilson Nursery, CA - 50 cherries trees travelling approx 2.5 mph. Each of the tree cultivars were counted 10 to 20 times with an average accuracy of 97% At J frank Schmidt, OR - 45 Gymnocladus seedlings travelling approx 2.5 mph. Each of the tree cultivars were counted 4 times with an average accuracy of 97% At J frank Schmidt, OR on 708 Staked 2 year old red pointe maple (½ - 1 ¼ caliper, 12 inch spacing) 91 to 90% accuracy. Low accuracy was result of a dust film on lens.
    16. 16. Localization Post-processed Device: U-blox 6T Cost: $300 to $400 Sub-meter accuracy Field tested ○ Spring (WA) ○ Fall (OR)
    17. 17. Localization Tractor track: raw data in red Processed data in green.
    18. 18. Localization Tractor’s speed plot: during travel at ~3.0 mph
    19. 19. http://www.cascrop.com/

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