PLC Based Sorting System Using Metal Detection


PLC Based Sorting System Using Metal Detection report

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PLC Based Sorting System Using Metal Detection

PLC Based Sorting System Using Metal Detection


Abstract: In today’s world of technology and due to speed running industries, the production rate has increased tremendously. Generally, manufacturing industries keep manufacturing same models with little variation in height, colour, weight, shape. And here sorting plays an important role. In such cases industries can’t bare human errors for sorting these products. Thus it become necessary to develop Low Cost Automation (LCA) for sorting these products in accurate manner. Industrial automation mainly focuses on developing automations having low cost, low maintenance, long durability and to make systems user friendly as possible. Finally, here we have developed a LCA system for sorting the light weight objects on the basis of height variation using DC geared motors which is controlled by Programmable Logic Controller (PLC) and the conveyor in the system passes the object in front of sensors and thus sorting logicis decided.


The development of manufacturing industries is dependent upon research in manufacturing process and innovation in new products. The countries that have higher manufacturing rate are known to be developed whereas those with little manufacturing are considered underdevelopedDuring processing, the raw material gets transformed into product. Once this product gets processed it earns a value for sale. Therefore, manufacturing is ‘adding value’ to the material. The value that is earned by the product should have more cost allowing the organization to make money out of it[1]. Generally, manufacturing industries keep manufacturing same models with little variation in height, color, weight, shape and thus sorting plays an important role here. In old days it was possible to implement manual labor for sorting similar objects. But nowadays due to increased production and for minimizing the labor expenditure for such unskilled task, industries can’t afford human errors for sorting these products. This forced industry to tend towards atomizing the sorting process. As economy has always been a considerable factor in developing industry, thus it become necessary to develop Low Cost Automation (LCA) for sorting these products in accurate manner. In automation industry, continuous innovation, finding effective ways to enhance productivity and cut-cost out of operations is the key to success. Burgeoning demand of the automation systemsnecessitates strategic re-evaluation in the value chain and improving market awareness. Industrial automation mainly focuses on developing automations having low cost, low maintenance, long durability and to make systems user friendly as possible.

In this project, we have developed a Low Cost Automation System for sorting the light weight objects on the basis of height variation. The project mainly focuses on sorting 3 different height objects using photo-electric sensors and DC geared motors interfaced with Programmable Logic Controller (PLC). This DC motor used for pushing the object from conveyor to sorted bin. The system consists of conveyor belt which takes the objects like bottles, small boxes or packages in front of sensors and thus sorting logic is decided by PLC. PLC is programmed with three different logics, each for sorting different height product. The system consists of total 4proximity optical sensors or photo-electric sensors, used to detect the presence of object and height of boxes. Now, in our project we have two conveyors which are pre-feed conveyor and main conveyor. The function of pre-conveyor is just to feed with different height boxes to main conveyor randomly. The function of main conveyor belt is to take the boxes in front of height measuring station. Our complete focus is on designing main conveyor. Main conveyor is powered by 3 phase AC induction motor controlled by Variable Frequency drive interfaced with PLC.