Determination of wheel sensor position using shock sensors...

B - Operations – Transporting – 60 – C

Patent

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B60C 23/04 (2006.01) B60C 23/00 (2006.01)

Patent

CA 2553349

A remote tire monitor system (102) includes a control unit (112) and a plurality of tire monitors (124, 126, 128, 130) mountable on respective wheels (104, 106, 108, 110) of a vehicle (100) to transmit radio signals to the control unit. The tire monitors each include a pair of motion sensors such as shock sensors (210, 212) and a control circuit (202) configured to determine position information for the respective tire monitor based on first and second shock sensor signals from the pair of shock sensors. The shock sensors produce an output voltage proportional to a change in applied force. Therefore, the offset created by centrifugal force in previously used accelerometers is absent, simplifying design of the tire monitors.

Un système de surveillance éloigné (102) pour de pneus comprend une unité de commande (112) et une pluralité de dispositifs de surveillance de pneus (124, 126, 128, 130) pouvant être montés sur des roues respectives (104, 106, 108, 110) d'un véhicule (100) pour transmettre des signaux radioélectriques à l'unité de commande. Les dispositifs de surveillance de pneus comprennent chacun une paire de capteurs de mouvement tels que des capteurs de chocs (210, 212) ainsi qu'un circuit de commande (202) configuré pour déterminer des informations de position concernant le dispositif de surveillance respectif en fonction d'un premier et d'un second signal provenant de la paire de capteurs de chocs. Ces derniers génèrent une tension de sortie proportionnelle à la variation d'une force appliquée. En conséquence, le décalage engendré par la force centrifuge dans les accéléromètres précédemment utilisés est évité, ce qui simplifie la conception des dispositifs de surveillance.

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