Mapeamento do Deslocamento das Hastes Derriçadoras de uma Colhedora de Café (Displacement Tracking of Harvester Rods of a Coffee Harvester)

Luiz de Gonzaga Ferreira Júnior (luizdgfj@gmail.com)1, Fábio Moreira da Siva (famsilva@ufla.br)1, Danton Diego Ferreira (danton@deg.ufla.br)1


1Universidade Federal de Lavras (UFLA)

This paper appears in: Revista IEEE América Latina

Publication Date: Dec. 2016
Volume: 14,   Issue: 12 
ISSN: 1548-0992


Abstract:
There is a certain difficulty by grower to properly regulate the coffee harvester for a specific condition of each harvest. To know the vibratory motion of the harvester rods during harvesting is the first step to find the best machine settings. This study aimed to track the trajectory performed by the rods in terms of amplitude and vibration frequency using instrumentation and signal processing techniques. For this, a low cost system composed of an open-source electronic prototyping platform Arduino and an accelerometer was proposed. With the proposed system, vibration signals were collected and processed via MatLab. The results showed the complete two-dimensional trajectory performed by the rods in different settings. From the achieved trajectories it is possible to better understand the harvesting rods behavior and extract important features like the maximum displacement in both vertical and horizontal motion, which can be very useful to define the best harvesting settings.

Index Terms:
coffee harvesting, signal processing, vibration   


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