Construção de um módulo de aquisição de dados para aplicações didáticas de controle digital

Abstract

Students in the Digital Control discipline at the Federal University of Technology - Paraná aim to develop the ability to analyze and design digital controllers for various applications. Therefore, for the development of a controller, it is necessary to identify the parameters that describe the process or physical phenomenon to be controlled. In this context, it is necessary a device, called Data Acquisition System (SAD), which is capable of digitizing, recording and storing analog signals, functioning as an interpreter of the physical world through the reading of sensors, and monitored some process by through a computer. The problems with this tool are related to the significant financial investment for the purchase of the equipment, the absence of technical documentation for carrying out any repairs at the university, and because it is a commercial product, the lack of safety circuits for misuse of the product.Thus, the objective of this project is centered on the construction and documents of a low cost and easy maintenance SAD, offering students of the discipline itself, the opportunity to consolidate their knowledge in the various areas of electrical and computer engineering. For the development of SAD, isolation, filtering, adjustment of offset and gain, saturation and protection were implemented. In addition to the programming of the embedded system and the creation of a man machine interface (MMI). As a result, the developed SAD obtained satisfactory responses, being able to perform readings, recordings, analyzes and graphical representations of analog signals acquired by several sensors, supporting the proposals of this work.