In speciality reference material from our country and in the countries with an advanced agricultu... more In speciality reference material from our country and in the countries with an advanced agriculture it hasn't appeared yet a calculation methodology with a view to projection's optimization of these mouldboards and on this line, the current paper, tries to bring a contribution in this field, benefiting by the advantages on which it presents the application of the analysis method with finite elements respectable programme of computer "COSMOS/M". By means of "Finite Elements Method" (FEM) respectively of "COSMOS/M" programme it could be performed the stress and deformation state's modelling in lamellar mouldboard, finally the authors achieving two subprogrammes of calculus. On the basis of this subprogrammes, a complete study of the stress and deformation state was effected, using the "Finite Elements Method" (FEM). Following the analysis with finite elements were calculated all the component parts of the stress and deformation tenso...
In this paper is presented an advanced methodology for the analysis of stress and strain distribu... more In this paper is presented an advanced methodology for the analysis of stress and strain distribution (statical structural analysis using the finite element method) in the working bodies of agricultural cultivators for seedbed preparation in order to optimize them. The geometrical model of soil working body was develoepd in SolidWorks format before being taken and transferred to the program of analysis with finite elenets (ANSYS), in order to perform the necessary resistance calculations made in linear static domain. The obtained results provide valuable information on proper geometric dimensioning of the working bodies of agricultural cultivators.
Medicinal and aromatic plants in our country is a great natural wealth and an important factor th... more Medicinal and aromatic plants in our country is a great natural wealth and an important factor that can contribute to the restructuring of rural space by creating opportunities for jobs in the new non-farm rural economy and increase competitiveness of ...
The paper presents the results of the author's researches on the line of pointing out the differe... more The paper presents the results of the author's researches on the line of pointing out the differences of behaviour at the requirements of the stratified composite materials used in the moldboard's engineering of mechanic ploughs and pointing out the advantages in using the stratified composite materials in comparison with the traditional materials. Rezumat: În lucrare se prezintă rezultatele cercetărilor autorului pe linia evidenţierii diferenţelor de comportament la solicitări a materialelor compozite stratificate folosite în construcţia cormanelor plugurilor mecanice şi evidenţierea avantajelor acestora în comparaţie cu materialele tradiţionale.
Abstract. Precision agriculture (AP) – is a model that will be applied in all developed countries... more Abstract. Precision agriculture (AP) – is a model that will be applied in all developed countries and aims an input modulate management (seeds, irrigation water, fertilizer, herbicide, insecticide) through soil tillage adaptation to the parcel heterogeneity characteristics. Precision agriculture, as a mecatronics application, leaves room for a new methodology (that aims towards a new agricultural system) that can be the key to many issues. Crop quality and yield increase is necessary in modern agricultural systems. A necessary requirement for production costs is that they must be lowered as much as possible in order to guarantee market copetitivity. This implies the use of complex management and the control of systems in order to regulate, efficiently a large quantity of physical interactive variables. Recent progress in hardware and software like microprocessors and microcontrollers, lead to complex control and task management integration in agricultural exploitations. Productivity...
Abstract. Electro-osmosys principle consists of the application of a direct current voltage to an... more Abstract. Electro-osmosys principle consists of the application of a direct current voltage to an anode-cathode system introduced into soil. The effect of this system consists of the mobilization of water particles from soil and their transport, in a very short period of time, from the anode to cathode. For the tilling machinery the anode may be a disc-knife and the cathode may be the working part (trash board, coulter knife, furrowers, etc). The soil water transported from the anode to cathode, on the tool-soil contact surface, in consequence, will produce a lubrication of an active surface and through this a great decreasing of the friction forces and implicit of the energy needed for displacing the tool through the soil. The energy needed for tilling the soil represents a great part of a total energy consumed for plants crop. When the soil is tilled by pulling or pushing of the tools for farming, a great part of the tilling energy is consumed for defeating the friction forces fro...
În lucrare s-a urmărit realizarea unui model matematic care caracterizează procesul de treier şi ... more În lucrare s-a urmărit realizarea unui model matematic care caracterizează procesul de treier şi separare dintr-un aparat de treier cu flux axial (batoză B 90), luându-se în consideraţie 7 din cei mai importanţi parametri de intrare: Q (kg/s), n (rot/min), δ (m), ρ (kg/m 3), v a (m/s), L (m) şi S (m 2). Pentru a controla procesul de modelare au fost stabiliţi şi parametrii de ieşire, respectiv: S s-funcţia de repartiţie a seminţelor separate, S d-funcţia densitate de repartiţie a seminţelor separate, S l-funcţia de repartiţie a seminţelor libere în spaţiul de treier şi S n-funcţia de repartiţie a seminţelor netreierate, p ev-valoarea pierderilor la evacuare. The aim of this paper was to obtain a mathematical model for characterizing the threshing and separating process within the axial flow of the threshing apparatus (B90 thresher), taking into consideration only 7 of the most important input parameters: Q (kg/s), n (rpm), δ (m), ρ (kg/ m 3), v a (m/s), L (m) and S (m 2). In order t...
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture
Electro-osmosys principle consists of the application of a direct current voltage to an anode-cat... more Electro-osmosys principle consists of the application of a direct current voltage to an anode-cathode system introduced into soil. The effect of this system consists of the mobilization of water particles from soil and their transport, in a very short period of time, from the anode to cathode. For the tilling machinery the anode may be a disc-knife and the cathode may be the working part (trash board, coulter knife, furrowers, etc). The soil water transported from the anode to cathode, on the tool-soil contact surface, in consequence, will produce a lubrication of an active surface and through this a great decreasing of the friction forces and implicit of the energy needed for displacing the tool through the soil. The energy needed for tilling the soil represents a great part of a total energy consumed for plants crop. When the soil is tilled by pulling or pushing of the tools for farming, a great part of the tilling energy is consumed for defeating the friction forces from the tool...
Within the article there are presented models of agricultural production maps made from the data ... more Within the article there are presented models of agricultural production maps made from the data obtained by a monitoring system for grain production MICRO TRAK type mounted on different types of harvesters (combines), used in the locations where the experiments were performed. Thus, in the first part of the article the concept of precision agriculture and its usefulness in the current economic situation is presented. In "Materials and methods" there is a description of the technical equipment used to make further experiments, as well as the choice of locations for their achievement. As a result of the conducted experiments, there were experimental yield map models obtained; their analysis and utility of the used system are presented in the concluding part of the paper.
Această lucrare prezintă un model pentru estimarea stării de tensiune din solul agricol sub acţiu... more Această lucrare prezintă un model pentru estimarea stării de tensiune din solul agricol sub acţiunea pneurilor agricole, după direcţia longitudinală şi după direcţia laterală, diferită una de alta, utilizând metoda elementelor finite. În prezent, una dintre cele mai avansate metodologii pentru modelarea fenomenului de propagare a tensiunilor în solul agricol este metoda elementelor finite, care este o metodă numerică ce permite obţinerea soluţiilor aproximative ale ecuaţiilor diferenţiale ce descriu această distribuţie. În această lucrare solul agricol a fost idealizat ca un material elasto-plastic conform criteriului Drucker-Prager.
Maize (Zea mays) is one of the most important crop plants, with multiple uses in human nutrition,... more Maize (Zea mays) is one of the most important crop plants, with multiple uses in human nutrition, animal feed and in the industry. High corn yields can be obtained by the use of high yield hybrids by using optimal technologies of cultivation of maize and of modern technology of mechanized works. With minimum losses for the harvesting grains, their main objectives are the use of modern requirements and adjusted on the optimum harvesting. The experience was located on an area of 5 hectares on land of Cărpinis, jud. Timis. They are 19 varieties of hybrid corn cultivated. The combine harvester was John Deere W550 with corn header for 6 rows. For the determination of samples harvested corn hybrids, are used performance apparatus for measuring and monitoring. Most major productions were obtained from drought-resistant varieties.Cereal harvesting is the fulfillment and the end of the agricultural production process as it is the meeting point of all man's doings, of all spiritual and ma...
Digital control made by using PLC's (Programmable Logic Controllers) is today the most common... more Digital control made by using PLC's (Programmable Logic Controllers) is today the most common technical solution applied to industrial command circuits, due to some obvious advantages like simplicity, flexibility, liability and no maintenance. This paper presents an original technical solution concerning that type of command used for all electrical equipment used on a classic conveyor sequence in agriculture, based on a Moeller PS4 industrial PLC. Rezumat:La ora actuală, cea mai utilizată soluţie tehnică pentru realizarea circuitelor de comandă digitale ale aplicaţiilor industriale se bazează pe implementarea la scară largă a automatelor programabile-PLC (Programmable Logic Controllers), din cauza unor avantaje evidente, cum ar fi simplicitate, flexibilitate, fiabilitate si intreţinere redusă. Această lucrare prezintă o soluţie tehnică originală pentru comanda unei benzi rulante pentru aplicaţii in agricultură, bazată pe automate programabile Moeller PS4.
Agriculture is a basic economic branch through its impact on social life and the environment. We ... more Agriculture is a basic economic branch through its impact on social life and the environment. We can speak of agriculture without having to refer to environmental consequences. Super intensive agriculture practiced due to technological level reached, has led to increased degradation of the environment and human life, requiring the concept of sustainable agriculture, in which the resource conservation is a fundamental condition. System of sustainable agriculture is increasingly accepted as an alternative to conventional agriculture, rational use of resources ensuring productivity, profitability and environmental protection. Agricultural productivity is influenced by the applied work technology, phyto- sanitary protection occupying an important place in these technologies. Combating pests and diseases is an important link in the process of growing plants. Use of new plant varieties and applying new technologies in preparation of germinative bed would not give the desired results witho...
The paper proposes an analysis of vibrations within many Romanian and foreign harvesters provided... more The paper proposes an analysis of vibrations within many Romanian and foreign harvesters provided with tangential threshing unit, watching the influence which these ones have on the human operator's health. The determination of vibrations has been performed on the basis of accelerations measured at various frequencies, on the three directions: x, y and z (by means of the accelerometers mounted on the main working parts of the harvester), tracing the nomographs representing the limits up to which, these are not dangerous for the operator's health. Key words: vibrations, harvester, accelerations, nomogram, frequency.
In speciality reference material from our country and in the countries with an advanced agricultu... more In speciality reference material from our country and in the countries with an advanced agriculture it hasn't appeared yet a calculation methodology with a view to projection's optimization of these mouldboards and on this line, the current paper, tries to bring a contribution in this field, benefiting by the advantages on which it presents the application of the analysis method with finite elements respectable programme of computer "COSMOS/M". By means of "Finite Elements Method" (FEM) respectively of "COSMOS/M" programme it could be performed the stress and deformation state's modelling in lamellar mouldboard, finally the authors achieving two subprogrammes of calculus. On the basis of this subprogrammes, a complete study of the stress and deformation state was effected, using the "Finite Elements Method" (FEM). Following the analysis with finite elements were calculated all the component parts of the stress and deformation tenso...
In this paper is presented an advanced methodology for the analysis of stress and strain distribu... more In this paper is presented an advanced methodology for the analysis of stress and strain distribution (statical structural analysis using the finite element method) in the working bodies of agricultural cultivators for seedbed preparation in order to optimize them. The geometrical model of soil working body was develoepd in SolidWorks format before being taken and transferred to the program of analysis with finite elenets (ANSYS), in order to perform the necessary resistance calculations made in linear static domain. The obtained results provide valuable information on proper geometric dimensioning of the working bodies of agricultural cultivators.
Medicinal and aromatic plants in our country is a great natural wealth and an important factor th... more Medicinal and aromatic plants in our country is a great natural wealth and an important factor that can contribute to the restructuring of rural space by creating opportunities for jobs in the new non-farm rural economy and increase competitiveness of ...
The paper presents the results of the author's researches on the line of pointing out the differe... more The paper presents the results of the author's researches on the line of pointing out the differences of behaviour at the requirements of the stratified composite materials used in the moldboard's engineering of mechanic ploughs and pointing out the advantages in using the stratified composite materials in comparison with the traditional materials. Rezumat: În lucrare se prezintă rezultatele cercetărilor autorului pe linia evidenţierii diferenţelor de comportament la solicitări a materialelor compozite stratificate folosite în construcţia cormanelor plugurilor mecanice şi evidenţierea avantajelor acestora în comparaţie cu materialele tradiţionale.
Abstract. Precision agriculture (AP) – is a model that will be applied in all developed countries... more Abstract. Precision agriculture (AP) – is a model that will be applied in all developed countries and aims an input modulate management (seeds, irrigation water, fertilizer, herbicide, insecticide) through soil tillage adaptation to the parcel heterogeneity characteristics. Precision agriculture, as a mecatronics application, leaves room for a new methodology (that aims towards a new agricultural system) that can be the key to many issues. Crop quality and yield increase is necessary in modern agricultural systems. A necessary requirement for production costs is that they must be lowered as much as possible in order to guarantee market copetitivity. This implies the use of complex management and the control of systems in order to regulate, efficiently a large quantity of physical interactive variables. Recent progress in hardware and software like microprocessors and microcontrollers, lead to complex control and task management integration in agricultural exploitations. Productivity...
Abstract. Electro-osmosys principle consists of the application of a direct current voltage to an... more Abstract. Electro-osmosys principle consists of the application of a direct current voltage to an anode-cathode system introduced into soil. The effect of this system consists of the mobilization of water particles from soil and their transport, in a very short period of time, from the anode to cathode. For the tilling machinery the anode may be a disc-knife and the cathode may be the working part (trash board, coulter knife, furrowers, etc). The soil water transported from the anode to cathode, on the tool-soil contact surface, in consequence, will produce a lubrication of an active surface and through this a great decreasing of the friction forces and implicit of the energy needed for displacing the tool through the soil. The energy needed for tilling the soil represents a great part of a total energy consumed for plants crop. When the soil is tilled by pulling or pushing of the tools for farming, a great part of the tilling energy is consumed for defeating the friction forces fro...
În lucrare s-a urmărit realizarea unui model matematic care caracterizează procesul de treier şi ... more În lucrare s-a urmărit realizarea unui model matematic care caracterizează procesul de treier şi separare dintr-un aparat de treier cu flux axial (batoză B 90), luându-se în consideraţie 7 din cei mai importanţi parametri de intrare: Q (kg/s), n (rot/min), δ (m), ρ (kg/m 3), v a (m/s), L (m) şi S (m 2). Pentru a controla procesul de modelare au fost stabiliţi şi parametrii de ieşire, respectiv: S s-funcţia de repartiţie a seminţelor separate, S d-funcţia densitate de repartiţie a seminţelor separate, S l-funcţia de repartiţie a seminţelor libere în spaţiul de treier şi S n-funcţia de repartiţie a seminţelor netreierate, p ev-valoarea pierderilor la evacuare. The aim of this paper was to obtain a mathematical model for characterizing the threshing and separating process within the axial flow of the threshing apparatus (B90 thresher), taking into consideration only 7 of the most important input parameters: Q (kg/s), n (rpm), δ (m), ρ (kg/ m 3), v a (m/s), L (m) and S (m 2). In order t...
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture
Electro-osmosys principle consists of the application of a direct current voltage to an anode-cat... more Electro-osmosys principle consists of the application of a direct current voltage to an anode-cathode system introduced into soil. The effect of this system consists of the mobilization of water particles from soil and their transport, in a very short period of time, from the anode to cathode. For the tilling machinery the anode may be a disc-knife and the cathode may be the working part (trash board, coulter knife, furrowers, etc). The soil water transported from the anode to cathode, on the tool-soil contact surface, in consequence, will produce a lubrication of an active surface and through this a great decreasing of the friction forces and implicit of the energy needed for displacing the tool through the soil. The energy needed for tilling the soil represents a great part of a total energy consumed for plants crop. When the soil is tilled by pulling or pushing of the tools for farming, a great part of the tilling energy is consumed for defeating the friction forces from the tool...
Within the article there are presented models of agricultural production maps made from the data ... more Within the article there are presented models of agricultural production maps made from the data obtained by a monitoring system for grain production MICRO TRAK type mounted on different types of harvesters (combines), used in the locations where the experiments were performed. Thus, in the first part of the article the concept of precision agriculture and its usefulness in the current economic situation is presented. In "Materials and methods" there is a description of the technical equipment used to make further experiments, as well as the choice of locations for their achievement. As a result of the conducted experiments, there were experimental yield map models obtained; their analysis and utility of the used system are presented in the concluding part of the paper.
Această lucrare prezintă un model pentru estimarea stării de tensiune din solul agricol sub acţiu... more Această lucrare prezintă un model pentru estimarea stării de tensiune din solul agricol sub acţiunea pneurilor agricole, după direcţia longitudinală şi după direcţia laterală, diferită una de alta, utilizând metoda elementelor finite. În prezent, una dintre cele mai avansate metodologii pentru modelarea fenomenului de propagare a tensiunilor în solul agricol este metoda elementelor finite, care este o metodă numerică ce permite obţinerea soluţiilor aproximative ale ecuaţiilor diferenţiale ce descriu această distribuţie. În această lucrare solul agricol a fost idealizat ca un material elasto-plastic conform criteriului Drucker-Prager.
Maize (Zea mays) is one of the most important crop plants, with multiple uses in human nutrition,... more Maize (Zea mays) is one of the most important crop plants, with multiple uses in human nutrition, animal feed and in the industry. High corn yields can be obtained by the use of high yield hybrids by using optimal technologies of cultivation of maize and of modern technology of mechanized works. With minimum losses for the harvesting grains, their main objectives are the use of modern requirements and adjusted on the optimum harvesting. The experience was located on an area of 5 hectares on land of Cărpinis, jud. Timis. They are 19 varieties of hybrid corn cultivated. The combine harvester was John Deere W550 with corn header for 6 rows. For the determination of samples harvested corn hybrids, are used performance apparatus for measuring and monitoring. Most major productions were obtained from drought-resistant varieties.Cereal harvesting is the fulfillment and the end of the agricultural production process as it is the meeting point of all man's doings, of all spiritual and ma...
Digital control made by using PLC's (Programmable Logic Controllers) is today the most common... more Digital control made by using PLC's (Programmable Logic Controllers) is today the most common technical solution applied to industrial command circuits, due to some obvious advantages like simplicity, flexibility, liability and no maintenance. This paper presents an original technical solution concerning that type of command used for all electrical equipment used on a classic conveyor sequence in agriculture, based on a Moeller PS4 industrial PLC. Rezumat:La ora actuală, cea mai utilizată soluţie tehnică pentru realizarea circuitelor de comandă digitale ale aplicaţiilor industriale se bazează pe implementarea la scară largă a automatelor programabile-PLC (Programmable Logic Controllers), din cauza unor avantaje evidente, cum ar fi simplicitate, flexibilitate, fiabilitate si intreţinere redusă. Această lucrare prezintă o soluţie tehnică originală pentru comanda unei benzi rulante pentru aplicaţii in agricultură, bazată pe automate programabile Moeller PS4.
Agriculture is a basic economic branch through its impact on social life and the environment. We ... more Agriculture is a basic economic branch through its impact on social life and the environment. We can speak of agriculture without having to refer to environmental consequences. Super intensive agriculture practiced due to technological level reached, has led to increased degradation of the environment and human life, requiring the concept of sustainable agriculture, in which the resource conservation is a fundamental condition. System of sustainable agriculture is increasingly accepted as an alternative to conventional agriculture, rational use of resources ensuring productivity, profitability and environmental protection. Agricultural productivity is influenced by the applied work technology, phyto- sanitary protection occupying an important place in these technologies. Combating pests and diseases is an important link in the process of growing plants. Use of new plant varieties and applying new technologies in preparation of germinative bed would not give the desired results witho...
The paper proposes an analysis of vibrations within many Romanian and foreign harvesters provided... more The paper proposes an analysis of vibrations within many Romanian and foreign harvesters provided with tangential threshing unit, watching the influence which these ones have on the human operator's health. The determination of vibrations has been performed on the basis of accelerations measured at various frequencies, on the three directions: x, y and z (by means of the accelerometers mounted on the main working parts of the harvester), tracing the nomographs representing the limits up to which, these are not dangerous for the operator's health. Key words: vibrations, harvester, accelerations, nomogram, frequency.
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