Estudo de viabilidade e projeto de um sistema de controle de carga de um elevador de grãos

Abstract

Through this paper will be showed the steps used to develop a solution based on industrial automation, to solve the problem with disarm by overload in grain elevators, type mug elevators, equipment which are very common in processing or receiving grain industries. The paper approaches the problem with the disconnection of elevators by overload, in an industry type processing grains. It analyzes the present industrial automation structure installed, and shows the strategies used to develop the solution to solve the problem. The methods used on the developing of the solution were previous analyzes of the specific needs that should be attended followed by the controller theory study, and industrial automation equipment available on the market, in order to find a viable solution. Defined the required equipment to the new system operation, it was assembled in a laboratory, that way it was possible to test all the subsystems which compounded it. The main system is compounded by an opening control of a pneumatic cylinder subsystem, and a current control of a three-phase induction engine subsystem. All the monitoring and the operation of the main system were done by an interface man machine. All the tests performed in laboratory provided satisfactory results, in the opening control of a pneumatic cylinder subsystem. The answer followed the reference with the error in the allowed tolerance. Also in the current control of the engine subsystem, the trials showed that the answer matches with what was expected.