Cengiz Özarslan

Vibration and noise characteristics of flap type olive harvesters.

The object of this study was to measure and evaluate the vibration and noise characteristics of five flap type portable harvesters using for olive harvesting and their effect on operator health during harvesting time. The vibration and sound pressure levels of different harvesters were measured at both idling and full load conditions. The vibration values of harvesters were measured and analyzed for both right and left hands and the sound pressure level was measured at ear level of the operator. The vibration total value was expressed as the root-mean-squares (rms) of three component values. The results indicated that in 10% of the exposed population traumatic vasospastic disease (TVD) appeared after 0.7-7.1 years for the left hand, 1.0-4.7 years for the right hand of the operator in continuous use of these harvesters, under usual working conditions. The sound pressure values at operators ear level of harvesters were found below risk levels when compared with ILO standards.

Vibration and noise characteristics of hook type olive harvesters

The objective of this study was to obtain and evaluate the vibration and noise characteristics of portable hook type mechanical olive harvesters. Experiments included five hook type olive harvesters. In this study, the vibration and sound pressure levels of different harvesters were measured at idling and full load condition. The vibration levels on the handle grip of harvesters were measured and analyzed for both operator’s right and left hand, respectively. The sound pressure level was measured at ear level of the operator. The frequency weighting acceleration was calculated. The vibration total value was expressed as the root-mean-square (rms) of three component values. The acceleration values vary between 5.52 and 39.15 ms -2 for right hand and 4.18 and 61.01 ms -2 for left hand. The equivalent noise pressure levels of the harvesters were measured between 91 and 103 dB (A) in the full loading conditions and between 67 and 80 dB (A) idling working conditions. Key words: Olive harvester, vibration, noise, hav

Selected Geometric Characteristics, Hydrodynamic Properties, and Impact Parameters of Quince Fruit (Cydonia vulgaris Pers.)

In this study, selected geometric properties, including linear dimensions; sphericity; mass of fruit; projected area; surface area; true density; volume; static coefficient of friction against different materials; hydrodynamic properties in water, such as terminal velocity, drag force, and buoyant force; and impact parameters, such as coefficient of restitution, absorbed energy, bruise area, and bruise volume, of two varieties of quince fruit were determined. The selected geometric and hydrodynamic properties were found to be considerably similar with both varieties in quince. The smallest values of bruise area and bruise volume were obtained with the corrugated board. The coefficient of restitution decreased with the increase in the drop height for each variety.