The paper reports the results of some laboratory and in field tests aimed at assessing the acceleration levels transmitted to the hand-arm system by an electric shaker for olive harvesting. One flap type olive harvester was applied to three bars, different for diameter (35 and 40 mm) and material (aluminium and carbon fibre) and the vibrations were measured in two points, next to the hand positions in working conditions. The laboratory tests allowed the evaluation of the acceleration levels in standard controlled conditions, while the in field tests allowed the assessing of the effects of the tree canopy with respect to the idle running.The results showed that in reducing the vibration total value, expressed as the root mean squares (RMS) of three component values, plays a major role the bar material: the average RMS value was about 12 m/s2 for the carbon fibre bar and about 21 m/s2 for the aluminium ones, without significant differences between the two diameters. The in field tests proved that the tree canopy had on average a negative effect on the vibration transmitted to the hand-arm system: in fact, the average RMS values increased from 16 (laboratory) up to 20 m/s2 (in field).
|Titolo:||Vibrations transmitted to the hand-arm system by electric shakers during olive harvesting|
|Data di pubblicazione:||2011|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|