Determination of Detachment Frequencies of Ripe Coffee Fruits (Coffea Arabica var. Colombia) by means of a Numerical and Experimental Approach

Kód výsledku v IS VaVaI

RIV/00216305:26620/17:PU140313 - isvavai.cz

Výsledek na webu

http://doi.org/10.31224/osf.io/qgkew

DOI - Digital Object Identifier

10.31224/osf.io/qgkew

Jazyk výsledku

angličtina

Název v původním jazyce

Determination of Detachment Frequencies of Ripe Coffee Fruits (Coffea Arabica var. Colombia) by means of a Numerical and Experimental Approach

Popis výsledku v původním jazyce

In this study, it is proposed an experimental and numerical approach to identify a bandwidth of harmonic frequencies where ripe fruits of Coffea arabica L. var. Colombia can be selectively stimulated. For this purpose, a geometric model was designed computationally to represent the topology of the coffee fruit-peduncle system in all ripening stages. Using analytical models and pseudo experimental data, the mechanical properties were estimated to carry out a finite element analysis of the system. It was verified with a detachment model that a fruit can be detached when a specific harmonic force (mechanical vibrations) is applied on the fruits in determined frequencies which correspond to the second vibration mode of the fruits. Results indicate that dynamic excitations between 130 to 150 Hz could detach only ripe fruits, since fruits that were in other ripening stages were not stimulated until detachment in that bandwidth.

Název v anglickém jazyce

Determination of Detachment Frequencies of Ripe Coffee Fruits (Coffea Arabica var. Colombia) by means of a Numerical and Experimental Approach

Popis výsledku anglicky

In this study, it is proposed an experimental and numerical approach to identify a bandwidth of harmonic frequencies where ripe fruits of Coffea arabica L. var. Colombia can be selectively stimulated. For this purpose, a geometric model was designed computationally to represent the topology of the coffee fruit-peduncle system in all ripening stages. Using analytical models and pseudo experimental data, the mechanical properties were estimated to carry out a finite element analysis of the system. It was verified with a detachment model that a fruit can be detached when a specific harmonic force (mechanical vibrations) is applied on the fruits in determined frequencies which correspond to the second vibration mode of the fruits. Results indicate that dynamic excitations between 130 to 150 Hz could detach only ripe fruits, since fruits that were in other ripening stages were not stimulated until detachment in that bandwidth.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10307 - Acoustics

Projekt

LQ1601: CEITEC 2020

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Applied Mechanics 2017 Conference Proceedings

ISBN

978-80-87434-08-6

ISSN

—

e-ISSN

—

Počet stran výsledku

4

Strana od-do

1-4

Název nakladatele

Ustav Fysiky Materialu AV CR

Místo vydání

Brno

Místo konání akce

Brno

Datum konání akce

25. 4. 2017

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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