Performance Comparison and Evaluation of Two Small Chili Pepper Harvester Prototypes That Attach to Walking Cultivators

Kim, Tae-Hyeong; Kim, Dae–Cheol; Cho, Yong Jin

doi:10.3390/app10072570

Cited by 7 publications

(6 citation statements)

References 4 publications

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“…Furthermore, most damaged hot peppers were recorded during transportation to the loading bay; thus, we suspect that too much force was applied to the hot pepper, resulting in the peppers being chopped and ripped out. Compared with a previous study on mechanical harvesting experiments, the damaged ratio observed in this study was much lower (8.37%) because the broader and blockier structure of the hot pepper ridges, characterized by the different planting distances, was more acceptable in managing the mechanical damage [10]. Furthermore, additional studies with fruit damage measurement in each harvester unit are required and would be done in the future.…”

Section: Damaged Hot Peppermentioning

confidence: 60%

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Effect of Planting Distance on the Mechanical Harvesting of Hot Pepper

et al. 2021

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Hot peppers are well known for being spicy and also have a high nutrient content. Human resources have formerly been used to harvest hot peppers; however, a high level of musculoskeletal risk to the human workforce has been reported. Therefore, to reduce the risk to farmers and replace the human workforce, the mechanical harvesting of hot pepper and steps to improve the harvesting efficiency of farmers were conducted. To achieve this, the effect of planting distance on the mechanical harvesting of hot peppers was analyzed at three planting distances (30, 40, and 50 cm) with several cultivars. Subsequently, machine-harvested hot peppers were classified into five groups (marketable, damaged, lost, unharvested, and twigged hot pepper), depending on their postharvest status. The average weight ratio of each group was then calculated, after which statistical analyses were conducted. The effect of planting distance on mechanical harvesting was then analyzed by comparing the differences between each group’s average weight ratio and the total weight of hot pepper, which was simultaneously harvested mechanically at each planting distance. Results showed that the average weight ratio of marketable, unharvested, and twigged hot pepper improved as the planting distance increased. However, no effect on the average weight ratio of damaged and lost hot pepper was observed. The highest yield of marketable hot pepper was found at a planting distance of 40 cm, and the average weight ratio to the whole was lower than at 50 cm of planting distance. Thus, the most suitable planting distance for mechanical harvesting was 40 cm.

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Section: Damaged Hot Peppermentioning

confidence: 60%

“…As reported, the harvesting efficiency increased with an increase in the speed of the helix; however, pepper with twigs and damage rates also increased. Thus, successfully harvesting rates require improvements in all rotational speeds of the helix [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Planting Distance on the Mechanical Harvesting of Hot Pepper

et al. 2021

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“…Kim et al [31] and Choi et al [40] measured the weights of harvested peppers, peppers without twigs, stem-attached peppers, damaged peppers, unharvested peppers, and damaged peppers. The performance of each pepper harvester was evaluated based on these measured weights.…”

Section: Analysis Methodsmentioning

confidence: 99%

“…When bigger particles, such as stemmed chili peppers, flow in from the picking part, the development of additional separating and sorting devices are required. Kim et al [31] obtained a PTR of 24.2-37.8% in a chili harvester comparison test, and suggested the need for a stem-separation and sorting device to reduce the input of additional manpower for sorting work after the chili harvest.…”

Section: Introductionmentioning

confidence: 99%

Performance Testing and Evaluation of Drum-Type Stem-Separation Device for Pepper Harvester

et al. 2021

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The chili pepper harvester has shown potential problems of low pepper stem separation and a high pepper damage rate. The low pepper stem separation has required additional labor, which consists of separating the pepper and stem after pepper harvesting. To improve the stem separation and sorting function of pepper harvesters, three-shaft and four-shaft drum-type stem-separation devices were manufactured, and performance tests were conducted to assess these devices. In an attempt to reduce the damage rate, a brush was used as the teeth in the drum-type stem-separation device. In the factor test, the rotational speeds of shaft 1(A), shaft 2(B), shaft 3(C), and the conveyor for the three-shaft drum were 0.9, 2.7, 1.3, and 0.5 m/s, respectively. The rotational speed of the four-shaft drum was the same as that of the three-shaft drum except for shaft 4(D), and the rotational speed of this additional D was set to 1.3 m/s, which was the same as that of C. In the non-moving status during the non-picking operation of the pepper harvester, the average stem-separation efficiency (SSE) of the four-shaft drum increased by 1.2%, the average pepper with twig rate (PTR) decreased by 5.9%, and the average damage rate (DR) increased by 3.7% compared to the three-shaft drum. In the moving status during the picking operation of the pepper harvester, the SSE of the four-shaft drum increased by 3.6%, the PTR decreased by 9.1%, and the DR increased by 3.8% compared to the three-shaft drum, so an improvement in the pepper stem-separation capacity was observed.

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“…Kim et al of the National Institute of Agricultural Engineering and Chonbuk National University, Korea, designed and fabricated two prototypes of an unfolded double-helix-type pepper harvester attached to a walk-behind cultivator. These two prototypes were designed and built with different frame materials, dividers, picking rollers, and auger speeds to compare the two pepper harvester field harvests [5]. The rod comb tooth type [6]: Palau et al developed a hydraulically driven single-row pepper harvester mounted on a three-point suspension of a 35 to 45 kW tractor, which brushes the pepper from the plant by the counter-rotation of the brush drums and brushes the pepper fruits onto conveyor belts on both sides, which convey the pepper with a fan that scavenges for the magazines remaining in them.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Collision Damage Mechanisms and Reduction Methods for Pod Pepper

Wang,

He,

Han

et al. 2024

Agriculture

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This study aims to address the current situation of the late start of mechanized harvesting technology for the pod pepper, the high damage rate of existing pod pepper harvesters, and the lack of theoretical support for key harvesting components. The Hertz theory is employed to investigate the damage mechanism of collisions between pod pepper and comb fingers. The study analyzes the maximum deformation of pod pepper and the critical speed at which damage occurs during the collision process. Furthermore, it explores the critical relative speed that leads to damage in pod pepper. Orthogonal tests are conducted to analyze the effects of rotational speed, hose thickness, and moisture content on the efficiency of pod pepper picking. The experimental results are then subjected to multifactorial ANOVA to identify the optimal test parameters. The structural and motion parameters of the picking device are optimized based on these conditions. It is determined that the critical relative velocity for damage to pod pepper during a collision with the comb finger is V0 = 11.487 m s−1. The collision velocities of pod pepper with different hose thicknesses are analyzed using the i-SPEED TR endoscopic high-speed dynamic analysis system to obtain the corresponding collision velocities for different hose thicknesses. The study finds that rotational speed, hose thickness, and the water content of pod pepper affect the damage rate and stem shedding rate. The optimal experimental parameters are determined to be a rotational speed of 705.04 rpm, hose thickness of 3 mm, and water content of the pepper of 71.27%.

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Performance Comparison and Evaluation of Two Small Chili Pepper Harvester Prototypes That Attach to Walking Cultivators

Cited by 7 publications

References 4 publications

Effect of Planting Distance on the Mechanical Harvesting of Hot Pepper

Effect of Planting Distance on the Mechanical Harvesting of Hot Pepper

Performance Testing and Evaluation of Drum-Type Stem-Separation Device for Pepper Harvester

Investigation of Collision Damage Mechanisms and Reduction Methods for Pod Pepper

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