Official Journal of the Japan Wood Research Society
From: Smart increment borer: a portable device for automated sampling of tree-ring cores
References | Core diameter (mm) | Total weight (kg) | Gear ratio | Max core length (cm) | Penetration speed (cm/min) | Reaction support | Remarks |
---|---|---|---|---|---|---|---|
This study | 5 | 6.0a | 1:24 | More than 80 | 50 | Leg and arms of the operator | One battery can sample 5.5 cores of 50 cm length (Cedrus deodara) and 36 cores of 14 cm length (Larix kaempferi) |
Hall and Bloomberg [12] | 11 | 1:10-1:11 | More than 80 | n.a. | Arms | There is a risk of wrist injury | |
Johansen [7] | More than 18 | 1:5 | n.a. | 98 | Arms | Electric drill (4.5 A) is used | |
This study | 12 | 9.5a | 1:24-1:118 | More than 80 | 12-50 | Leg and arms | One battery can sample 4.0 cores of 40 cm length (C. deodara) and 26 cores of 14 cm length (L. kaempferi) |
Krottenthaler et al. [3] | 23 | None | 270 | 1.5 | Support frame | Sawing increment borer is used | |
More than 6 | 1:20 | n.a. | 37.5 | Arms | Tanaka engine drill is used, but it is “slightly underpowered” [5] |