Suspendable scale for weighing a bundle and a forest machine

A suspendable scale for weighing a bundle, comprising:

• a first part for suspending the scale from a structure supporting the scale;
• a second part for suspending an implement from the scale;
• a third part joining the first part and second part, arranged to change shape from an effect of the implement acting on the first part and second part and caused by a bundle to be hoisted by the implement, the first part, second part, and third part being at least partly radially nesting relative to one another, wherein the third part is, in a direction perpendicular to a plane of the scale, at least partly thinner in thickness than the first part and second part, and the third part includes two annular grooves at a distance from each other radially, to increase deflection of the third part;
• at least two strain gauges connected to the third part to form measurement data on forces acting on each strain gauge, on basis of deformation of the third part, wherein at least one strain gauge is fitted to the third part on an opposite side of the third part relative to the annular grooves, aligned with the annular grooves on both sides of the first part, to measure the elongation at a relevant point in the third part;
• a wireless transmitter for sending the measurement data to an operator;
• a self-powered power supply for feeding an electric current to the strain gauges and the wireless transmitter;
• a first space is formed in the scale to integrate the wireless transmitter inside the scale and a second space to integrate the self-powered power supply inside the scale.

A suspendable scale for weighing a bundle, comprising:

• a first part for suspending the scale from a structure supporting the scale;
• a second part for suspending an implement from the scale;
• a third part joining the first part and second part, arranged to change shape from an effect of the implement acting on the first part and second part and caused by a bundle to be hoisted by the implement, the first part, second part, and third part being at least partly radially nesting relative to one another;
• at least two strain gauges connected to the third part to form measurement data on forces acting on each strain gauge, on basis of deformation of the third part;
• a wireless transmitter for sending the measurement data to an operator;
• a self-powered power supply for feeding an electric current to the strain gauges and the wireless transmitter;
• a first space is formed in the scale to integrate the wireless transmitter inside the scale and
• a second space to integrate the self-powered power supply inside the scale, wherein the first space and second space are identical in surface area and shape in direction of a plane of the scale.

A suspendable scale for weighing a bundle, comprising:

• a first part for suspending the scale from a structure supporting the scale;
• a second part for suspending an implement from the scale;
• a third part joining the first part and second part, arranged to change shape from an effect of the implement acting on the first part and second part and caused by a bundle to be hoisted by the implement, the first part, second part, and third part being at least partly radially nesting relative to one another;
• four or eight strain gauges connected to the third part to form measurement data on forces acting on each strain gauge, on basis of deformation of the third part, wherein said strain gauges are situated on a first segment running through a center point of the first part symmetrically on either side belonging to the first part's center point, in such a way that on each side of the first part a number of strain gauges is half of a total number of strain gauges;
• a wireless transmitter for sending the measurement data to an operator;
• a self-powered power supply for feeding an electric current to the strain gauges and the wireless transmitter;
• a first space is formed in the scale to integrate the wireless transmitter inside the scale and
• a second space to integrate the self-powered power supply inside the scale, wherein the first space and the second space are identical in surface area and shape in a direction of a plane of the scale and the strain gauges are situated only on the first segment.