Resumo -Este artigo apresenta o desenvolvimento de uma nova técnica de interrogação de sensores à fibra óptica baseados em redes de período longo (LPG). A técnica é um modelo matemático simples e robusto, que considera todos os parâmetros espectrais da LPG, como largura de banda, comprimento de onda de ressonância e profundidade de atenuação. A validação dessa técnica é feita por resultados experimentais obtidos de medidas do índice de refração, com erro relativo inferior a 0,15%. Foi verificada uma faixa dinâmica de operação para a obtenção do deslocamento do comprimento de onda de ressonância da LPG em torno de 18 nm. period grating (LPG). The technique is a simple and robust mathematical model, that considers all the LPG's spectral parameters, such as the bandwidth, the resonance wavelength, and the attenuation depth. The validation of this technique is done by experimental results obtained from measurements of the refractive index, with relative error less than 0.15%. A dynamic operating range to obtain the resonance wavelength shift of the LPG around 18 nm was verified.
Palavras-Chave-Técnica de Interrogação, Redes de Período Longo (LPG), Índice de Refração.
Abstract-This paper presents the development of a new interrogation technique for optical fiber sensors based on long
Convolutional neural network 1d-CNN CNN using 1d input data ANN Artificial neural network DFT Discrete Fourier transform Seasonal persistent model 2 Turbidity to discharge linear model MLP Multilayer perceptron CNN-Q 1d-CNN with discharge input CNN-QT 1d-CNN with discharge and turbidity input ReLU Rectified linear unit function MSE Mean squared error NMSE Normalized mean squared error MAPE Mean absolute percentage error Date of publication xxxx 00, 0000, date of current version xxxx 00, 0000.
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