Projeto e análise de um sistema de aquisição de dados distribuído para aplicações em tempo real.

Abstract

In this dissertation is presented the project and analysis of a Distributed Acquisition Data System that it was development to acquire in real time the information converted for some distributed sensors into the Laboratory of Thermoelectrical Generation which is installed in the Department of Electric Engineering in the Federal University of Campina Grande. The main component of this Laboratory is an electromechanical system consisting by an motor of the cycle diesel of 250 HP connected to an electric generator to capacity of 150 kW. The acquisition data system is composed by eight sensor nodes and one supervisor node. All sensor nodes have been projected and development in accordance with the requirement of the application. Each in sensor node is responsible for the acquisition and transmission of the information collected for its respective sensors to the supervisor node, as the requirements of time demanded by the system. These no descommunicate via a bus with 25 meters in length with a transmission rate of 1 Mbps in accordance with the CAN (Controller Area Network) protocol. A version time-triggered of the CAN protocol was implemented by software in the CAN chip, having used an algorithm of synchronization based on specification TTCAN (Time-Triggered CAN) level 1.