Phase based sensing

Details Phase based sensing Phase based sensing

G - Physics

01

D

G01D 5/247 (2006.01)

Patent

CA 2692469

A method of interrogating a phase based transducer by providing a pulsed input including two different wavelengths. The different wavelength components can be used to derive a phase change experienced by a synthetic wavelength, and by arranging for the synthetic wavelength to be significantly greater that the component wavelengths, the phase so detected has a reduced sensitivity, and is less susceptible to overscaling effects.

L'invention porte sur un procédé consistant à interroger un transducteur basé sur la phase par la fourniture d'une entrée pulsée comprenant deux longueurs d'onde différentes. Les composantes de longueurs d'onde différentes peuvent être utilisés pour déduire un changement de phase subi par une longueur d'onde synthétique, et par agencement pour que la longueur d'onde synthétique soit significativement supérieure aux longueurs d'onde de composantes, la phase ainsi détectée a une sensibilité réduite, et est moins sensible à des effets d'agrandissement d'échelle.

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