Nova tecnica de processamento de sinais no dominio do tempo de giroscopios interferometricos de Sagnac a fibra optica

AUTOR(ES)

Jose Carlos Juliano de Almeida

DATA DE PUBLICAÇÃO

2001

RESUMO

This work focuses on the study of a new time domain signal processing technique of Sagnac interferometric fiber optic gyroscopes. The technique consists in demodulating the output signal of the interferometer to obtain the rotation rate W and to monitor both the optical phase modulation depth m f and the incident power level 0 P , by measuring the dc value and the ac negative peak values of the photocurrent generated in the photodetector. A signal processor was developed to test the signal processing scheme in the demodulation of the rotation rate measured by a laboratory model of a high grade gyroscope. The experimental results showed a resolution and scale factor stability performance comparable to those of a comercial high resolution lock-in amplifier. This work has greatly contributed to the development of future advanced processors of the output signal of this kind of sensor for application in strapdown inertial navigation system at IEAv.

ASSUNTO(S)

detectores optoeletronica giroscopios oticos processamento de sinais demodulação (eletronica) interferometros

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