A magnetohydrodynamic angular rate sensor for measuring...

G - Physics – 01 – P

Patent

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G01P 3/46 (2006.01) G01P 3/44 (2006.01) G01P 7/00 (2006.01)

Patent

CA 2070628

An electronic motion sensor is described; wherein in a cavity (20) formed in a case (11) of high flux density material supports a permanent magnet (28) at the bottom. The permanent magnet (28) has a north/south pole orientation in line with the cavity axis. A circular channel (20) is located above, having an axis coincident with the cavity axis and which is filled with mercury. A center contact post (21) is located long the cavity axis in contact with the mercury, extending upwards through the top of the channel. An amplifier circuit (29) supported on a header (27) of high flux density material is placed on top of the channel. The amplifier (27) amplifies the potential difference between the center contact post (21) and the case (11). The header (27) effectively seals the cavity of the case.

L'invention concerne un détecteur de mouvement électronique dans lequel une cavité (20) formée dans un boîtier (11) de matière de densité de flux élevée supporte un aimant permanent (28) au fond. L'aimant permanent (28) possède une orientation polaire nord/sud en ligne avec l'axe de la cavité. Un canal circulaire (20) se situe au-dessus dont l'axe coïncide avec l'axe de la cavité, ce canal étant rempli de mercure. Un plot de contact central (21) est situé le long de l'axe de la cavité en contact avec le mercure, et s'étend vers le haut au travers de la partie supérieure du canal. Un circuit amplificateur (29) supporté sur un collecteur (27) de matière de densité de flux élevée est placé sur la partie supérieure du canal. L'amplificateur (27) amplifie la différence de potentiel entre le plot de contact central (21) et le boîtier (11). Le collecteur (27) étanchéifie efficacement la cavité du boîtier.

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