Development of a Clod Separator for Potato Packing Houses

Feller, Ron; Margolin, E.; Zacharin, A.; Pasternak, Hartmut

doi:10.13031/2013.32380

Cited by 13 publications

(6 citation statements)

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“…This study was focused on developing an on-line segregation procedure for soft olives based on differences in rebound trajectory already applied to other cases such as potato versus clod segregation (Feller et al, 1985(Feller et al, , 1987. There was special interest in comparing the performance of this method against other available reference techniques such as at-line mechanical and optical properties and colour measurements.…”

Section: Separación De Aceitunas Blandas Con Durofel Y En Línea Emplementioning

confidence: 99%

Segregation of soft olives using Durofel and on-line rebound

Elorza

Altisent

Moya

et al. 2004

Span. j. agric. res.

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Traditional table olive fermentation processing produces variable proportions of defective olives that must be eliminated before final packaging. Defects include fish eye ("alambradas"), compact ("compactas") and over-ripe olives. For two testing periods during the 2001 season, different batches were graded by size, colour parameters, hardness, density and rebound distance (total number tested was 760 olives). The latter was determined using a specially designed prototype made by an on-line rotating drum covered with a commercial rubber material to avoid damage (13.3 cm total diameter and 6.81 rad s-1 rotation speed). Results showed that 96% of measured variance could be explained by the four Principal Components Analysis of extracted factors. Moreover, hardness measured as Durofel- 25 units is closely related to rebound distance. Softness thresholds have been addressed for both hardness parameters with devoted logistic models, permitting correct segregation (with 95% of well-classified individuals) of all soft olives (over-ripe and fish eye) using the rebound drum.

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Section: Separación De Aceitunas Blandas Con Durofel Y En Línea Emplementioning

confidence: 99%

Segregation of soft olives using Durofel and on-line rebound

Elorza

Altisent

Moya

et al. 2004

Span. j. agric. res.

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“…The physical properties of weeds are used to design harvesters that separate weeds according to their dimensions, weight, bulk density, shape and aerodynamic properties (Hauhouot-O'Hara et al, 2000). In potato harvesters, product properties are used to separate clods from potatoes using the difference in their rebound trajectories (Feller et al, 1985).…”

Section: Product Propertiesmentioning

confidence: 99%

Review. Technologies for robot grippers in pick and place operations for fresh fruits and vegetables

Blanes

Mellado

Ortíz

et al. 1970

Span. j. agric. res.

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Robotics has been introduced in industry to replace humans in arduous and repetitive tasks, to reduce labour costs and to ensure consistent quality control of the process. Nowadays robots are cheaper, can work in hostile and dirty environments and they are able to manipulate products at high speed. High speed and reliability and low robot gripper costs are necessary for a profitable pick and place (P&P) process. However, current grippers are not able to handle these products properly because they have uneven shapes, are flexible and irregular, have different textures and are very sensitive to being damaged. This review brings together the requirements and phases used in the process of manipulation, summarises and analyses of the existing, potential and emerging techniques and their possibilities for the manipulation of fresh horticultural products from a detailed study of their characteristics. It considers the difficulties and the lack of engineers to conceive of and implement solutions. Contact grippers with underactuated mechanism and suction cups could be a promising approach for the manipulation of fresh fruit and vegetables. Ongoing study is still necessary on the characteristics and handling requirements of fresh fruit and vegetables in order to design grippers which are suitable for correct manipulation, at high speed, in profitable P&P processes for industrial applications.Additional key words: food manipulation; horticulture grasp; postharvest science and technology; robotic product handling. ResumenRevisión. Tecnologías en garras robotizadas para operaciones de coger y dejar productos hortofrutícolas frescos La robótica ha sido introducida en la industria para reemplazar a los humanos en tareas arduas y repetitivas, reducir mano de obra y para asegurar una calidad constante de los procesos. Actualmente los robos son más baratos, capaces de manipular productos a alta velocidad y de trabajar en ambientes hostiles. Por tanto, los robots pueden trabajar en operaciones de "coger y dejar" (pick & place, P&P) con frutas y hortalizas frescas. Para un proceso rentable de P&P, son necesarias una alta velocidad y fiabilidad, así como un bajo coste de los sistemas de agarre. Este artículo de revisión recopila las necesidades y fases empleadas en el proceso de manipulación, reuniendo y analizando las técnicas existentes, potenciales y emergentes y sus posibilidades de aplicación para la manipulación de productos hortofrutícolas frescos a partir del estudio detallado de sus características. Considera las dificultades y la falta de ingenieros para concebir e implementar soluciones. Los autores proponen las alternativas más prometedoras para acometer este difícil problema y consideran la necesidad de seguir estudiando las características de frutas y vegetales frescos y las necesidades de manipulación. Las garras de contacto con mecanismos infra-actuados y ventosas o agarrar el producto sin contacto pueden ser las alternativas más prometedoras para manipular frutas y vegetales frescos. Es necesario continuar e...

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“…However, due to friction between chain (bed) or soil and potatoes, the potatoes were greatly damaged. A simple mechanical separator was developed by Feller et al(1985) . The machine utilizes the difference in the restitution coefficient between potatoes and soil clods.Both potatoes and clods are dropped from a feed conveyor onto a revolving steel roller where the resulting trajectories cause the potatoes to end up at a more remote location than the clods.…”

Section: Introductionmentioning

confidence: 99%

“…The machine utilizes the difference in the restitution coefficient between potatoes and soil clods.Both potatoes and clods are dropped from a feed conveyor onto a revolving steel roller where the resulting trajectories cause the potatoes to end up at a more remote location than the clods. The separator can not be used to separate stones from the potatoes [6]. Gan-Mor et al(1986) used a appropriate elastic plate for reducing the restitution coefficient of stones without changing that of the potatoes or clods so that the stones were separated [7].…”

Section: Introductionmentioning

confidence: 99%

Design of a New Soil-Tuber Separation Device on Potato Harvesters

Gao

Zhang

2011

Computer and Computing Technologies in Agriculture IV

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Abstract.A new soil-tuber separation device on potato harvesters has been developed. It mainly comprises a linear motor, a rectangular screen, a frame, four supporting springs and four dampers. It is the first time to propose that the soil-tuber separation device is driven by the linear motor. Forces acting on the rectangular screen are found. A differential equation for describing the forces is set up. An equation for evaluating exciting force of the linear motor has been derived from the solution to the differential equation. An equation of the factors affecting on the device resonance has also been obtained. Additionally, an equation for evaluating the deformed magnitude of the damping springs in the dampers has been derived. And finally a motion simulation experiment for the rectangular screen on a potato harvester has been done with the Matlab/Simulink module. The experiment expressed that the method is feasible.

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Development of a Clod Separator for Potato Packing Houses

Cited by 13 publications

References 0 publications

Segregation of soft olives using Durofel and on-line rebound

Segregation of soft olives using Durofel and on-line rebound

Review. Technologies for robot grippers in pick and place operations for fresh fruits and vegetables

Design of a New Soil-Tuber Separation Device on Potato Harvesters

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