Study On Posture Of Chainsaw Operator During Felling Operation Based On Ergonomics

At present, the forestry job environment is very bad, besides the necessary control duty, the operators need to overcome many situations, such as the long-time standing, the heavy-tool's holding, the long-time's maintaining, the waist's bending, the vibration, the noise of the machine, and so on. These influences will not only create the worker comfortableness and the working efficiency drops, moreover, they may immediately influence theirs physical and moral integrity. Therefore, by using precise and reliable measuring tool with the theory methodology to study correct felling operation posture and carries on the effective appraisal, then adopts the effective measure prevention and reduces the damage occurrence, has become one of the most important topics domestic and even the international forestry expert studies. Under this background, based on the man-machine engineering, this article develops chain saw felling operation posture research, based on the man-machine engineering, biological mechanics and the mathematical statistics, the chain saw work posture appraisal questions are systematically studied. The whole research work is as flows:By using the human body biology mechanics and statistics principle, in view of the chain saw operator long carry on the chain saw in plane woods operation time work posture human body's mechanics characteristic description and the stress analysis, the woods operation posture human body statics equation was constructed, the chain saw standing position woods operation the human body simplifies the statics model is inferred. Then, the analysis standing position woods operation human body center of gravity displacement tendency and condition was described. Take affects the human body balanced mechanics factor as the foundation, with the aid of the sawing process's in empirical datum, calculates and analyzes when the woods operation under the different operation scope the center of gravity displacement to the human body stability and the working efficiency influence.Based on man-machine engineering, the attention of influence chain saw felling operation posture control is studied. Firstly, the attention the movement psychology narration to determine the disturbance attention the primary factor is determined; Next, attention influence work own stable degree appraisal criterion and appraisal plan is established; Furthermore, carried on scene modeling to study, under key research attention influence chain saw operator heart rate change; Finally, the chain saw operator wearily to its attention centralized influence is studied via the HSP brain breath training method.The body compatibility and the load change to the chain saw felling operation posture control influence were studied via the mathematical statistic method. Firstly, the bodily compatibility and the load change based on the physiology of exercise to the posture control influence was outlined; Next, the bodily compatibility and the load change influence posture control appraisal criterion and the appraisal plan were established. Finally the experimental study was carried out. Through the empirical datum reorganization statistical analysis, the chain saw operator work achievements analysis was obtained.For the issue of chain saw logging security work and the felling operation reasonable posture choice, the application analytic hierarchy process and the fuzzy evaluation law carry on the multi-objective quality synthetic evaluations were established. It was avoided, causes The occurrence of the weight forecast and the actual situation contradictory phenomenon caused by person's subjectivity was avoided. From the practice investigation,6 kind of daily felling operations and study the common work posture were summarized. The analytic hierarchy model was established by analytic hierarchy theory. Then the detailed science to various criteria was carried out, the target value measurement division, has planned the reasonable plan weight value scope. Finally, the fuzzy comprehensive judgment was used to obtain various postures plan to the target stratum total weight value. Through the selection of optimal posture plans, the most reasonable posture plan was given.The effect quality synthetic evaluation model of chain saw logging was constructed using machine learning's in SVM algorithm. In order to enhance the model's test precision, the blending inheritance algorithm achievement was used to optimize the model. Through the simulation experiment, the comparison was carried out to obtain the more reliable model of chain saw logging effect evaluation.This research may provide the theory reference for determination of worker's working strength for the different forestry operation, it may also has the important theory instruction value in the area of the quantitative investigation in the different forestry work worker's waist back muscle and the spinal column undertake, regarding prevents and reduces the forestry work worker to provide the labor safety and the protection, the diagnosis and the correction bad work posture, carries on work skill training, the instruction to design and to improve the forestry production tool, occupational disease's prevention and the treatment and so on.