الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
 |  | from | 121 |  |  |
| | | from | 121 | | |
Abstract
This research developed and manufactured an automated grading prototype which is able to incorporate flexibility and separate selected orange and at the same time move objects automatically to the defined places by the regulation of the integrated load cells sensors, microcontroller and relay switch circuit (RSC). The prototype consists of feeding unit and grading unit as two major components. The automatic grading prototype was tested and evaluated at Rice Mechanization Center (RMC) (Meet El Dyba, Kafrelsheikh governorate) during the year of 2014-2016. The performance evaluation was conducted at two distances between spoons (182 and 364 mm), four different surfaces of the belt that connect feeding unit (wood, cotton, linen and leather), grading with and without infrared control unit and three sensing time (3, 6 and 9 sec) for Valencia orange fruits. The result obtained showed that the optimum operational conditions for maximizing the grading efficiency were 182 mm distance between spoons, 3 sec for sensing the weight and using infrared unit to control the feeding rate. Technical evaluation also showed that maximum productivity value of the grading prototype was 0.47 Mg/h for Valencia orange with the optimum operational parameters.