نوع مقاله : مقاله پژوهشی
نویسنده
گروه مکانیک بیوسیستم،واحد تبریز، دانشگاه آزاد اسلامی، تبریز، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسنده [English]
The depth control systems used in Iranian tractors are mechanical and they produce variable tillage depth in uneven field surface. In this research a rotary type electronic control valve was designed and constructed. By using this valve, electro-hydraulic tillage depth control system was developed and installed on the tractor. The control system was composed of: a depth sensor, a Programmable Logic Controller (PLC), a stepper motor with deriver, a control valve and a Programmable Terminal (control panel). In this system, the tillage depth was measured by utilizing a depth sensor and the control valve which is controlled by the stepper motor was used to 3-point linkage control. The laboratory results showed that the depth variations were controlled well by the developed system within ±2 cm in the steady state. Also the field data indicated that the mean tillage depth of electro-hydraulic depth control system was greater than that of the mechanical depth control system with significance difference.
کلیدواژهها [English]