Determining Hand-harvest Parameters and Postharvest Marketability Impacts of Fresh-market Blackberries to Develop a Soft-robotic Gripper for Robotic Harvesting

Author:

Myers Andrea1,Gunderman Anthony2,Threlfall Renee1,Chen Yue2

Affiliation:

1. Food Science Department, University of Arkansas, 2650 N. Young Avenue, Fayetteville, AR 72704

2. Biomedical Engineering Department, Georgia Institute of Technology/Emory, 313 Ferst Drive NW, Atlanta, GA 30332

Abstract

Hand-harvesting parameters and postharvest marketability attributes of fresh-market blackberries (Rubus L. subgenus Rubus Watson) were characterized to develop a prototype for a soft-robotic gripper for robotic harvesting. A custom-made, force-sensing apparatus attached to the thumb and fingers of a person hand-harvesting blackberries was developed to quantify forces used to harvest and to identify appendages for harvesting. Four cultivars of blackberries grown in Arkansas were harvested at optimal ripeness and stored at 2 °C for 21 days to determine the impact on marketability attributes (leakage, decay, and red drupelet reversion). The forces during harvest imparted by the thumb and middle finger were greatest (0.77 N and 0.37 N, respectively), whereas the index and ring fingers used lower forces (0.16 N and 0.06 N, respectively), primarily to stabilize the blackberry. The forces applied to grab, stabilize, and harvest blackberries caused minimal marketability damage (leakage, <10%; decay, <2%; and red drupelet reversion, <8%) after postharvest storage. This project quantified harvest and postharvest parameters, allowing data-driven design of a three-prong soft-robotic gripper for harvest of fresh-market blackberries.

Publisher

American Society for Horticultural Science

Subject

Horticulture

Reference7 articles.

1. Effects of harvest time (7:00 AM and 12:00 PM) on postharvest quality of Arkansas fresh-market blackberries;Felts,,2020

2. Tendon-driven soft robotic gripper for berry harvesting;Gunderman,,2021

3. Tendon-driven soft robotic gripper for blackberry harvesting;Gunderman,,2022

4. Changes in fresh-market and sensory attributes of blackberry genotypes after postharvest storage;Segantini,,2017

5. Soft robotic grippers;Shintake,,2018

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1. Compliant Robotic Gripper with Integrated Ripeness Sensing for Blackberry Harvesting;2024 IEEE International Conference on Robotics and Automation (ICRA);2024-05-13

2. Field-evaluated Closed Structure Soft Gripper Enhances the Shelf Life of Harvested Blackberries;2024 IEEE International Conference on Robotics and Automation (ICRA);2024-05-13

3. Tendon-Driven Soft Robotic Gripper with Integrated Ripeness Sensing for Blackberry Harvesting;2023 IEEE International Conference on Robotics and Automation (ICRA);2023-05-29

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