Highly sensitive cross axis accelerometer

G - Physics – 01 – P

Patent

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Details

G01P 15/02 (2006.01) G01B 11/16 (2006.01) G01V 1/18 (2006.01)

Patent

CA 2436753

A highly sensitive accelerometer for determining the acceleration of a structure includes a mass within a housing rotationally supported by a hinge and opposing support members. The support members are alternately wound around a fixed mandrel and the mass in a pendulum arrangement. At least a portion of one of the support members comprises a transducer capable measuring the rotation of the mass within the housing. An embodiment of the invention employs optical fiber coils as support members for use in interferometric sensing processes. Arrays of such interferometer based accelerometers maybe multiplexed using WDM or similar methods.

L'invention concerne un accéléromètre à haute sensibilité servant à déterminer l'accélération d'une structure, qui comprend une masse dans un logement supporté de manière rotative par un pivot et des éléments support opposés. Ces derniers sont enroulés de façon alternée autour d'un mandrin fixe et la masse est disposée à la façon d'un pendule. Au moins une partie d'un des éléments support comprend un transducteur capable de mesurer la rotation de la masse à l'intérieur du logement. Dans un mode de réalisation, des bobines de fibres optiques sont utilisées comme éléments support, dans des processus de détection interférométrique. Des réseaux d'accéléromètres basés sur un interféromètre peuvent être multiplexés par MRL ou des procédés analogues.

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