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| Refigh, Alireza; Kalantari, Davood; Mashhadimeyghani, Hamid. |
| Abstract: This paper presents design and construction of an autonomous robot for using in greenhouse condition. The robot designed to prevent human hazards involved in spraying potentially toxic chemicals in the confined space of a hot and steamy glasshouse. In order to navigate the robot, hot water piping rails along the rows were used as a method of guidance for autonomous robot. The robot is able to force and back along the hot water piping rails of rows in greenhouse avoiding the expensive and complicated navigation systems. Power was transmitted from two DC motors to two driving wheels through a gearbox and shaft system. The AVR microcontroller controls all of the inputs and outputs of the system. To program the micro used from BASCOM-AVR... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2606 |
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| Sedighi, Shahryar; Kalantari, Davood; Shiukhy, Saeid; Rédl, Jozef. |
| Leaf spot disease is one of the most common fungal diseases that cause immense and sometimes irreparable damage to poplar trees. Therefore, in order to prevent the development of this fungal disease and to reduce its losses, identification and elimination of its pathogen (Septoria fungi) is very important. In this regard, conventional methods for detection of fungal contamination are time-consuming, costly and difficult. Therefore in this study, in order to distinguish healthy leaves from infected ones, as well as determining the rate of infection progress, a modified image processing algorithm by using the Laplacian threshold was used. Based on the results obtained in this study, the effect of illumination wavelength on the percentage of disease... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Image Processing; Machine Vision; Poplar Tree; Wavelength. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6601 |
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| hasantabar, saeed; Mousavi Seyedi, Seyed Reza; Kalantari, Davood. |
| In this research, a new rubbing threshing machine was designed, constructed and evaluated based on the equations, tables and standards of machine components design, and its performance was analyzed and compared theoretical and practical. It is made with electric motor, inverter, husking roller, mechanical jack, belt and etc. This built-in machine has a width of 300 mm, working height of 100 mm, speed between 110 to 210 rpm and a maximum power of 2 hp. The practical test was carried out on two products (soybean and mung bean). Moisture content varies between 12% and 17%, speed and the distance between drum and concave vary in three levels (110, 170 and 210 rpm) and (7, 8, 9 mm) for soybean and (6, 7, 8 mm) for mung bean, respectively. The experiments were... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2019 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4866 |
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| Dehghan Hesar, Hadi; Kalantari, Davood. |
| This study presents a numerical investigation regarding the stress distribution on the new designed disc harrow using the ANSYS software. A conventional disc, notched disc, and a biomimetic design inspired by the claw of the leatherwing were analyzed in two conventional plowed and unplowed soils and three tillage depths (4, 7 and 10 cm). Stress analysis for all treatments showed that the highest stress was imposed at the disc-stem junction. Meanwhile the highest deformation occurred at the lowest and the most external part of the discs (land line). The results obtained in this study indicated that the maximum stress exerted from tilling soil to discs increases linearly with tillage depth in both plowed and unplowed soils. Given these results, the maximum... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stress; Disk harrow; Finite element; Resistance; Biomimetic. |
| Ano: 2016 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3561 |
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