Mechanical Harvesting of Apricots

Erdoğan, Doğan; Güner, Metin; Dursun, Ergin; Gezer, İ.

doi:10.1016/s1537-5110(03)00024-2

Cited by 92 publications

(55 citation statements)

References 12 publications

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“…Atualmente, as máquinas empregadas para a colheita mecanizada de culturas, como café, damasco, laranja, pistache, oliva e uva, utilizam o princípio de vibrações mecânicas (Erdogan et al, 2003;Sanders, 2005;Sessiz & Ozcan, 2006;Souza et al, 2006;Polat et al, 2007;Pezzi & Caprava, 2009;Santos et al, 2010a). Por meio de fontes de potência elétrica, pneumática, hidráulica ou mecânica, a energia cinética é transmitida à planta ou a uma parte dela, promovendo o desprendimento dos frutos.…”

Section: Introductionunclassified

Determinação das propriedades geométricas, físicas e mecânicas do sistema fruto-pedúnculo-ramo do cafeeiro

Coelho¹,

Santos²,

Pinto³

et al. 2015

Rev. bras. eng. agríc. ambient.

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R E S U M OO método de elementos finitos tem sido empregado no projeto de máquinas e para o estudo do comportamento dinâmico do cafeeiro. Objetivou-se, neste trabalho, determinar as propriedades geométricas, físicas e mecânicas do sistema fruto-pedúnculo-ramo do cafeeiro. As dimensões foram determinadas por meio de processamento de imagens, as massas e os volumes mensurados utilizando-se balança e proveta, respectivamente. Os módulos de elasticidade foram determinados por meio de ensaios mecânicos de compressão, tração e flexão, para os frutos, pedúnculos e ramos, respectivamente. Os coeficientes de Poisson foram determinados a partir das deformações longitudinais e transversais dos frutos e pedúnculos. A razão de amortecimento foi determinada por meio das curvas de decaimento utilizando-se o método de decremento logaritmo. Concluiu-se que as dimensões e a massa dos frutos apresentaram tendência de aumento na medida em que seu estádio de maturação evoluiu. Os módulos de elasticidade dos frutos e dos pedúnculos no estádio de maturação verde foram superiores aos valores para o estádio de maturação cereja. Determination of geometric, physical and mechanical properties of coffee fruit-stem-branch system A B S T R A C TThe finite element method has been employed in the machine design, as well as to study the dynamic behavior of the coffee plant or its parts. The objective of this study was to determine the geometric, physical and mechanical properties of coffee fruit-stem-branch system. The dimensions were determined by image processing, the masses and volumes measured using weighing-machine and graduated cylinder, respectively. The modulus of elasticity was determined by compression, tension and bending mechanical tests for fruits, stems and branches, respectively. The Poisson's ratio was determined using the longitudinal and transversal deformation of the fruits and stems. The damping ratio was determined by the decay curves using the logarithmic decrement method. It was concluded that the fruit dimensions and mass showed a tendency to increase with mature stage evolution. The modulus of elasticity for fruit and stems in green (cherry) stage was higher than the values for the mature stage.

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Section: Introductionunclassified

Determinação das propriedades geométricas, físicas e mecânicas do sistema fruto-pedúnculo-ramo do cafeeiro

Coelho¹,

Santos²,

Pinto³

et al. 2015

Rev. bras. eng. agríc. ambient.

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“…Geometric properties: The dimensional characteristics are important for designing mechanism for harvesting storage and transportation. (Erdoˇgan et al, 2003). The geometric properties such as diameter, equatorial length and length, geometric mean diameter (GMD), arithmetic mean diameter (AMD), harmonic mean diameter (HMD), surface area and specific surface area are tabulated in Table 1.…”

Section: Resultsmentioning

confidence: 99%

Studies on physico-mechanical properties of W. Murcott mandarin

Rehal

Kaur

Bons

2017

JANS

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Abstract:The post-harvest physico-mechanical properties of fruits is important in adoption and design of various handling, packaging, storage and transportation systems. These are important for sizing and grading the fruit before marketing as well as demarcate their end use. Geometric, gravimetric and textural properties were determined for the fresh samples of W. Murcott mandarin. The results show that W. Murcott fruit diameter varies from 81.82-68.97 mm, equatorial length varies from 86.51-68.43 mm, and length varies from 61.33-52.08 mm. The specific mean area is 57.591 with the sphericity of 0.90. The L, a, b values were 53.37, 42.9 and 49.68 respectively. The firmness varied from 1.351-1.650 kgf. These physical attributes can be taken into consideration while designing the grading and processing equipment.

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“…In recent years, harvesting technologies for the mechanical fruit detachment process have been intensively studied, particularly for fruit trees such as oil olive trees whose production is destined for industrial transformation. Initially, branch shakers and shaker combs facilitated fruit detachment by selecting the bearing branches without modifying the tree structure in crops that were traditionally manually harvested such as olive [2] , apricot [3] or cherry trees [4] . Later, trunk shakers enabled detachment of the fruit from the whole tree after modifications had been made in tree structure, such as in olive [5] or almond trees [6] .…”

Section: Introductionmentioning

confidence: 99%

An innovative circular path harvester for mechanical harvesting of irregular, large-canopy olive trees

Sola-Guirado

Blanco-Roldán

García

et al. 2018

International Journal of Agricultural and Biological Engineering

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Abstract:The harvesting process of the olive tree is mainly performed by manual means, because traditional olive orchards (the main planting typology) are formed of irregular, large-canopy trees that are very difficult to harvest mechanically. For that reason, the cost of harvesting is very high, and it threatens the future of these plantations whose conversion to other more modern layouts is not always possible due to several limitations. The introduction of a harvester may represent the technological change that is the key factor for improved competitiveness. The main purpose of this work was to develop a harvester based on canopy shaker technology for work on irregular, large trees in a circular path. The design of the harvester was based on a determination of tree geometry, together with tree training. Field tests were used to determine machine-tree interaction, and to evaluate the removal, catch frame and driven systems. The proposed innovation allowed the fully mechanical harvest of previously planted trees with a removal efficiency of over 84%, achieving an effective field capacity of 0.21 hm 2 /h. Although the results so far have been promising, further improvements are advisable in machine and tree

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Mechanical Harvesting of Apricots

Cited by 92 publications

References 12 publications

Determinação das propriedades geométricas, físicas e mecânicas do sistema fruto-pedúnculo-ramo do cafeeiro

Determinação das propriedades geométricas, físicas e mecânicas do sistema fruto-pedúnculo-ramo do cafeeiro

Studies on physico-mechanical properties of W. Murcott mandarin

An innovative circular path harvester for mechanical harvesting of irregular, large-canopy olive trees

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