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Harano Y.,Pipoly Machinery Corporation | Ozima M.,Pipoly Machinery Corporation | Araya K.,Senshu University | Teramoto C.,Senshu University | And 4 more authors.
Engineering in Agriculture, Environment and Food | Year: 2012

When haskaop berries were harvested by vacuum suction, trash such as leaves was collected together. In order to separate haskaop berries from other materials during harvest, a vertical separation column (mean air velocity was 4 ms -1) was designed and built, as described earlier. In this paper, a portable and prototypical haskaop harvester was designed and built with this separation column. The results showed that the average harvest speed by handpicking was 0.45 berries/s (1 kg/h) and that by the harvester was 2.5 berries/s (6 kg/h). A soft plastic sheet (2 mm thick) was the most feasible as a material for rake fingers. The best shape for the harvester collection scoop employed a pitch of fingers at 12 mm and height 5 mm. The percentage of damaged berries by handpicking was nearly 0%, but that by the harvester was generally acceptable at 4%. Berries never found their way into the exhaust (dust) hopper. Source


Konno S.,Senshu University | Araya K.,Senshu University | Teramoto C.,Senshu University | Wakita Y.,Hokkaido Forestry Research Institute | And 3 more authors.
Engineering in Agriculture, Environment and Food | Year: 2010

In order to separate haskaop berry and leaf during harvest, a vertical separation column was envisaged. The air drag coefficients of berry and leaf were measured to determine the proper air velocity in the separation column. The results show that the air drag coefficient of a berry set horizontally in the air flow was 0.959-2.21, and that of a berry set vertically was 0.322-0.977. The air drag coefficient of the leaves was 0.622-2.36. The minimum terminal velocity of berries (horizontally, 9.1 ms -1 and vertically, 11.0 ms -1) was significantly different from the maximum terminal velocity of the leaves (2.35 ms -1). Therefore, it should be possible to separate the berries and leaves using the air velocity from trial experiments in the separation column. Source


Konno S.,Senshu University | Araya K.,Senshu University | Teramoto C.,Senshu University | Wakita Y.,Hokkaido Forestry Research Institute | And 3 more authors.
Engineering in Agriculture, Environment and Food | Year: 2011

In order to separate haskaop berries from other materials during harvest by vacuum suction, a vertical separation column was built where specific weight separation would take place. The results showed that the most suitable configuration of the separation column without damage to berries was one with an inlet pipe through the berry bin. This generated vertical air flow throughout the separation column. Thus, leaves were always suspended in the column. When berries entered the column, air velocity decreased, and berries fell into the berry bin. The required air velocity in the transportation pipe was more than 22 ms-1 to move the heaviest berries. The required air velocity in the separation column was more than 4 ms-1 where the heaviest leaves could remain aloft and be separated from the berries. Source

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