Mechanical Harvesting of Citrus Fruits for Fresh Market With a Trunk Shaker and a Hand-Held Petrol Shaker

Torregrosa, A.; Ortiz, C.; Martín, B.; Moreno, R.; Moltó, Enrique; Chueca, Patricia

doi:10.17660/actahortic.2012.965.3

Cited by 2 publications

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“…Previous studies showed the effectiveness of vibration systems for mechanical citrus harvesting [7,8]. Vibrational limb and trunk shaking systems have been tested for mechanical citrus harvesting [3,[9][10][11][12]. Trunk shakers can be used to harvest citrus fruits; frequencies around 15 to 25 Hz and amplitudes around 0.02 m have shown promising results.…”

Section: Introductionmentioning

confidence: 99%

Citrus Fruit Movement Assessment Related to Fruit Damage during Harvesting with an Experimental Low-Frequency–High-Amplitude Device

2022

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The profitability of fresh citrus crops outlines the possibility of using mechanical systems to reduce the high cost of the manual harvesting operation. In this line, an experimental light shaker with low frequency and high amplitude and a hydraulic arm was developed. This device had been successfully used for harvesting ornamental citrus trees. In previous studies, it was proven that the removal percentage was adequate, but the percentage of slightly damaged fruit increased compared to a traditional fruit trunk shaker. Visualizing the fruit movements in high-speed video recording images during harvesting, a higher impact level was observed due to the higher amplitude. The aim of this study was to analyze the fruit movement during the vibration with the experimental shaker compared to the movement when vibrating with an orchard tractor mounted trunk shaker related to the increase of slightly damaged fruit when using the experimental shaker. Fruit movement parameters (fruit distance, fruit displacement, speed and acceleration) when using the two harvesting systems (experimental shaker and trunk shaker) were compared analyzing the high-speed video recordings. Results showed that the higher vibration amplitude produced a maximum distance experienced by the fruits (maximum displacement of 0.135 m with the experimental shaker compared to 0.078 m with the trunk shaker) that could cause a higher damage level (74% of slightly damaged fruits using the experiemntal shaker compared to 14% using the trunk shaker).

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Section: Introductionmentioning

confidence: 99%

Citrus Fruit Movement Assessment Related to Fruit Damage during Harvesting with an Experimental Low-Frequency–High-Amplitude Device

2022

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“…Besides, it has been confirmed that fruits receive impacts with other fruit, branches, or machine elements when using canopy shaker systems [26]. Limb and trunk shaking devices have also been studied as vibration systems for mechanical citrus harvesting [9,[27][28][29][30][31]. Trunk shakers used to harvest citrus registered frequencies around 15 Hz to 25 Hz and amplitudes around 0.02 to 0.03 m. According to [31], total tree removal percentages registered with the limb shakers (around 50 percent) were lower than with the trunk shakers (between 70 percent and 80 percent).…”

Section: Introductionmentioning

confidence: 99%

Comparison of a Lightweight Experimental Shaker and an Orchard Tractor Mounted Trunk Shaker for Fresh Market Citrus Harvesting

2021

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A designed lightweight experimental shaker successfully used to collect ornamental oranges has been tested to harvest fresh market citrus. The aim of this study was to evaluate the removal efficiency and operational times of this experimental device compared to an orchard trunk shaker. Three different collecting systems were studied. ‘Caracara’ citrus trees were tested. Removal efficiency, vibration parameters, fruit and tree damages, and fruit quality were measured. A high-speed camera was used to record operational times and determine cumulative removal percentage over vibration time. The canvases on the ground reduced the severe fruit damages but were not useful to protect against light damages. The experimental shaker produced a higher percentage of slightly damaged oranges. No significant differences in removal efficiency were found between the two harvesting systems. However, removal efficiency using the experimental device could be reduced by 40 percent and working time increase by more than 50 percent when access to the main branches was difficult. In agreement with previous results, the curve representing the branch cumulative removal percentage in time followed a sigmoidal pattern. A model was built showing that during the first 5 s more than 50 percent of the fruits were detached.

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Mechanical Harvesting of Citrus Fruits for Fresh Market With a Trunk Shaker and a Hand-Held Petrol Shaker

Cited by 2 publications

References 0 publications

Citrus Fruit Movement Assessment Related to Fruit Damage during Harvesting with an Experimental Low-Frequency–High-Amplitude Device

Citrus Fruit Movement Assessment Related to Fruit Damage during Harvesting with an Experimental Low-Frequency–High-Amplitude Device

Comparison of a Lightweight Experimental Shaker and an Orchard Tractor Mounted Trunk Shaker for Fresh Market Citrus Harvesting

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