Ferramenta para avaliação de excentricidade em motores de indução utilizando sensores a fribra ótica

Abstract

The present work consists in the development and presentation of an acquisition and computational treatment system of data for spectral evaluation of harmonic components in the motor vibration that emerges from the dynamic eccentricity presence in the rotor axis, due to unbalance load. To achieve this goal, this work made use of the optical sensing technique called Fiber Bragg Grating. Two single-mode optical wires were engraved with four sensors each, the first one monitoring the vibration in the stator’s teeth, and the second one the vibration in the coil’s head. The signals were acquired by an optical interrogator connected to a computer via Ethernet communication, and processed by the software LabView. From the developed software, it is possible to expound and manipulate the data, exhibiting both the response in the time domain and vibration frequency to define the specific machine’s characteristics. The software shows malleability to different instrumentations, and adaptability for future studies, requiring few alterations to make other analysis functions.