Stochastic modeling of granular flow in seed sorting

Balascio, Carmine C.; Misra, Manjit K.; Johnson, H. P.

doi:10.1016/0895-7177(88)90548-1

Cited by 4 publications

(1 citation statement)

References 10 publications

(3 reference statements)

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“…Most modern separation devices use a layer-by-layer seed recognition algorithm, which allows for "the reduction of the total execution time" [22] but can lead to "extremely unstable results" [23]. Therefore, for the processing of small volumes of forest seeds it is necessary to orient seeds on one [20] and to provide accurate and fast coordinated actions of optoelectronic [24,25] and mechanical systems [26] with use of a stochastic algorithm [27,28]. At the same time, for precision seed feeding, it is possible to use rollers rotating in opposite directions [29], a pneumatic single dispenser [30], or a robotic arm [22].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Motion Time of a Scots Pine Single Seed on Mobile Optoelectronic Grader Efficiency: A Mathematical Patterning

et al. 2019

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Research Highlights: Forest owners will be able to solve the problem of testing and selection of viable forest seeds on location and save financial, time, and material resources. The possibility of integrating non-destructive quality control and separation functions in a single portable apparatus is extremely promising. The speed of the contemporary optoelectronic grader is limited by the speed of the slowest component—the mechanical system. Background and Objectives: The technological process of forest seed establishment and design of optoelectronic graders is based on a priori mathematical modeling of structural characteristics, taking into account these criteria. Known models of industrial photoseparators are expensive and have a high energy and material consumption not applicable in the field. Laboratory seed analyzers are characterized by a long time exposure, and the overall size and level of climatic performance do not allow them to be used in the field. Consequently, for small amounts of seed treatment, it is necessary to orient the seeds one by one and ensure clear and rapid coordinated actions of optoelectronic and mechanical systems. The main goal of this research is to increase the efficiency of grading forest seeds by patterning the speed of the mobile device. We will answer the following questions. What are effective geometric parameters for the seed pipe? What factors affect the speed of a single seed’s movement? Materials and Methods: This study is based on mathematical modeling, taking into account the basic principles of mechanics, using MatLab software. Results: A mechanical model of a single Scots pine seed’s motion in different zones of the seed pipe is designed, taking into account air resistance. The effective height of the seed pipe, taking into account the response time of optoelectronic grader systems, is determined. Conclusions: The time and speed of single seed movement through grader systems depends on the seed pipe’s height and radius of curvature. Other things being equal, through the use of the same optical scheme with a microprocessor to solve various problems, the compactness of the photodetector scheme allows, if necessary, to upgrade the grader to solve research problems and for use in forestry.

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Section: Introductionmentioning

confidence: 99%

The Effect of Motion Time of a Scots Pine Single Seed on Mobile Optoelectronic Grader Efficiency: A Mathematical Patterning

et al. 2019

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Trier separator of seed material of small seed oil crops

Aliiev¹,

Lupko²,

Belka³

et al. 2021

Sci-Tech Bul IOC

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The purpose of the research is to analyze the terrier separators of seed seeds of small-seeded crops and to develop an appropriate mechatronic control system, the use of which will perform the separation process with lower specific operating costs and higher productivity. The presented analysis of the technical support of the process of separation of seed material of small-seeded crops allows to assert the need to improve trier separators based on automated control of their parameters using photo or video recording of the process of separation of seed material with further processing. It is established that the definition of formal performance indicators of a cylindrical honeycomb trier is not trivial. The article develops a structural and technological scheme of a mechatronic system of a trier separator. The difference between the proposed system and the traditional one is that the camera fixes the trajectory of the seed flight. This information is processed in the control unit, which in turn changes the speed of the gear motor and, as a consequence, the drum with cells, the tilt angle of the tray, the angle of rotation of the damper with the stepping motor of the metering hopper. These manipulations with the operating parameters of the indented separator make it possible to adjust it to changes in the composition of the seed mixture, thereby increasing the quality of separation. In addition, due to the automatic adjustment of the operating parameters of the indented separator, the participation of the plant operator in the separation process is practically leveled, which reduces labor costs.

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Processing and evaluation of the results of a psychological experiment using PPP Statistica in the study of the seed separator of oil seeds

Bakardzhiev¹,

Patsula²

2021

Sci-Tech Bul IOC

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As a result of the analysis of technological methods of seed material separation and their technical support it is established that the main trends in the development of precision seed cleaning equipment are the creation of adaptive control systems that allow dynamic optimization of working modes without operator intervention. The process of separation of oilseeds is a complex system that is influenced by a large number of independent variables, and only some of them significantly affect the original parameter studied. Therefore, starting to find the optimal parameters or conditions of the studied phenomenon, it is necessary to determine in advance which independent variables are to be studied. The article presents the definition of the Kendall concordance coefficient and its statistical assessment with a priori ranking of the estimates of the influence of independent variables in a psychological experiment for a multivariate active experiment using Friedman's nonparametric analysis of variance with the use of PPP Statistica in the study of an oilseed separator. A method is proposed for determining the number of significant factors for obtaining the response function by resolving the exponential equations of transgression into areas of fast and slow fall using the proportionality coefficient of the linear equation. It was found that the assessment of the results of the psychological experiment by Friedman's analysis of variance using the PPP Statistica allows us to determine the Kendall concordance coefficient and perform its statistical assessment. To obtain a determination of the number of significant factors of the response function, it is proposed to use the exponential and linear equations of transgression together. So, for the case under consideration with a significance level of p = 0.000001, it can be argued that experts with a concordance coefficient W = 0.66967 argue that four factors - the length of the working chamber of the separator, the air flow speed, the height of the fan and the number of intake chambers most of all affect the performance of the oilseed separator. cultures.

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Stochastic modeling of granular flow in seed sorting

Cited by 4 publications

References 10 publications

The Effect of Motion Time of a Scots Pine Single Seed on Mobile Optoelectronic Grader Efficiency: A Mathematical Patterning

The Effect of Motion Time of a Scots Pine Single Seed on Mobile Optoelectronic Grader Efficiency: A Mathematical Patterning

Trier separator of seed material of small seed oil crops

Processing and evaluation of the results of a psychological experiment using PPP Statistica in the study of the seed separator of oil seeds

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