Method for check measurement of a log processed with tree-handling device, corresponding measurement system, forest machine and hardware

A measurement system for a check measurement of a log processed with a tree-handling device, which is arranged to be performed with a measurement device for measuring a diameter of the log processed with the tree-handling device at one or more longitudinal (L) measuring points of the log, the measurement system comprising:

• the tree-handling device arranged to process the log;
• at least one sensor configured to create measurement data in connection with the processing of the log, the measurement data including a lengthwise position and a diameter of the log;
• at least one processor and a memory connected to the at least one processor, the at least one processor arranged to compare the diameter of the log based on the measurement data to the diameter of the log measured with the measurement device;
• and
• wherein the at least one processor is configured to:
• create a measuring instruction for the log based on the measurement data created in connection with the processing of the log with the tree-handling device;
• compare at least one diameter measured with the measurement device to the diameter determined in connection with the processing of the log with the tree-handling device;
• determine, based on the comparison, an accuracy of the diameter determined in connection with the processing of the log with the tree-handling device;
• and
• control a diameter determination performed in connection with the processing of the log with the tree-handling device based on the determined accuracy or create information concerning the diameter determination based on the determined accuracy, and the measurement device is configured to measure the diameter of the log processed with the tree-handling device according to the measuring instruction created for the log.