Plataforma de ensaio e caracterização de amostras de liga com memória de forma.

Abstract

This work was developed as part of requirements to obtain a title of Electrical Engineer trough the Center of Electric Engineering and Computer Science - CEEI (Centro de Engenharia Elétrica e Informática) of the Federal University of Campina Grande - UFCG (Universidade Federal de Campina Grande). The project subject idea has come of necessity to have more information about Shape Memory Alloy (SMA) samples, used as actuators in the Laboratory of Electronic Instrumentation and Control - LIEC (Laboratório de Instrumentação Eletrônica e Controle), part of the Academic Unit of Electric Engineering - UAEE (Unidade Acadêmica de Engenharia Elétrica). The platform was constructed using the knowledge acquired throughout the course of graduation, in special those directed toward the electronic instrumentation, with the functioning and use of sensors and actuators, microcontrollers and programming. In text our intention is to show all creation process of a platform capable to extract necessary parameters to adequate use of SMA, displaying our used methods, materials and the form as everything was made. In Chapter Two, we tried to provide the platform general vision, showing all its component elements and the way we put all devices together It’s in this part of the text where reader must have an platform general functioning idea, but not entering project details. In following Chapter we expose detailed functioning of each sensor and each actuator by itself, showing in details the use of each platform part individually; this Chapter contains project’s most time and work demanded stage. Forth Chapter is written in order to demonstrate how the system-user interface was made. In that Chapter we explain functions of the ADuC microcontroller and programming software LabVIEW. Reading that section will bring to reader the understanding on how to communication between user and platform itself. How to increase or decrease temperature, how to apply or reduce stress applied on the wire; everything must be clarified at this reading end. Finally, we finish showing what conclusions we take off of this work, displaying the biggest difficulties, commenting some aspects of the project and leaving suggestions for future works.