Experimental Research on Grape Cluster Vibration Signals during Transportation and Placing for Harvest and Post-Harvest Handling

Berry dropping or shattering is an important factor during the harvest and post-harvest handling of fresh eating grapes until they reach supermarkets. There are a lot methods to measure placing damage detachment force for single fruits. However, now, there has been no objective method observe analyze berry mechanism cluster fruits robotic handling. Therefore, in this paper, effect cluster’s vibration on drop vertical transportation impact different packaging materials grape clusters were analyzed. For purpose, lead screw lathe, along with attached actuator, three samples (0.48, 0.50, 0.53 kg), (rigid plastic box, corrugated fiberboard expandable polystyrene box), four speeds (0.4, 0.6, 0.8, 1.0 m/s), acceleration excitations (6, 8, 10, 12 m/s2) that given mechanical system (actuator) studied. In order before after material, sensor high-speed video camera used. It was concluded from test increase speed excitations, change hanging increased positively (R2 = 0.92). Additionally, striking decreased negatively 0.97), corresponding index deflection increased. also observed images rigid boxes caused maximum berries, highest 8.6 N impact. Experimental results showed negative correlation between signals cluster, goodness fit R2 0.95 at speeds. Overall, proposed findings can be used as reference study improving handling, providing useful visual technical understanding fall susceptibility fruits, develop tool avoiding both industrial farm levels.