Material testing device for determining internal condition and density of wood using drilling resistance measurement e.g. with three parallel drill drives

摘要

The device includes at least two or three drill drives, preferably in parallel, one beside the other in a drilling machine. Simultaneous measurements are made in the material under test using the different drill drives. An electronic control device monitors and controls all the drives in the drilling machine. In the case of delicate drill tools, a support is used which holds all contained tools.