Detachment efficiency of fruits from coffee plants subjected to mechanical vibrations

Detachment efficiency of fruits from coffee plants subjected to mechanical vibrations

Blog Article

The development of efficient machines for the mechanical harvesting of coffee plants requires the use of appropriate vibrational parameters.Thus, in order to detach less unripe fruits and decrease reharvesting, branch breakage and defoliation, it is important to choose the appropriate frequency, amplitude and vibration time.This study aimed at analyzing the detachment efficiency of fruits from COMBAT WHITE CHOCO RASPBERRY coffee plants according to vibrational parameters and ripening stage.Fruit bunches were sampled at the green and mature stages and subjected to vibration, using a system composed by a signal generator, an amplifier and an electromagnetic vibrating machine.Tests combined different frequencies Conductivity Gels (16.

4 Hz, 20.3 Hz, 24 Hz, 25.6 Hz, 30.0 Hz and 33.0 Hz), amplitudes (5.

0 mm, 7.0 mm and 9.0 mm) and vibration times (10.0 s and 20.0 s).

The vibration times did not affect the detachment efficiency.There was a trend for higher detachment efficiency in mature fruits than in green fruits.The detachment efficiency increased with increasing vibration frequency and amplitude.