Appreciation Ergonomics of Cabin of the Agricultural Tractors - Visibility

Abstract

This work to present a study of the visual loss of the operator of agricultural tractor during its work in the field being compared a tractor with cabin and without cabin. The used methodology was going defined by Standard ISO 5721/81: Agricultural tractors – Operator’s field of vision. They were going determined the visual fields A, B and C starting from the position of the eyes of the operator in the plans 0°, +30° and -20°. In that plans they were going calculates the effect-mask caused by each one of the obstacles. In the plan at the level of the soil. the visual loss was determined by the projection of the shade in each visual field. The obtained results demonstrated that the use of the cabin decreases the field of vision of the operator in the fields B and C in all the plans 0°, +30° and -20° and that in the field A they stay the same values in each plan. At the level of the soil, the visibility loss is very larger in the visual field B and minimum in A and C. Key-words: visibility, visual fields, visual loss.