Chain saw, chain saw work evaluation system and chain saw work evaluation method

摘要

PROBLEM TO BE SOLVED: To provide a chain saw capable of correctly grasping a recording of a work using the chain saw, preventing occurrence of disaster, and being useful for safety management of a work.SOLUTION: A chain saw work evaluation system comprises: a work information acquisition part for acquiring work information in use time of a chain saw at a work site; a transition probability matrix creation part for, on the basis of the work information acquired by the work information acquisition part, creating an element work transition probability matrix which indicates a probability in which each element work included in plural element works occurs in a next step of one element work; and an abnormality determination part for comparing reference data stored in advance, and the element work transition probability matrix, for determining presence/absence of abnormality.SELECTED DRAWING: Figure 3