Reduction of wire numbers in a paper scanner power track

G - Physics – 01 – D

Patent

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G01D 11/00 (2006.01) D21G 9/00 (2006.01) G01N 33/34 (2006.01) G05B 11/32 (2006.01)

Patent

CA 2701971

The performance of scanning systems can be significantly enhanced by replacing the traditional power track with preferably just two wires or transmission channels for effecting communication between (i) the sensors on the mobile carnage of the scanning system and (ii) the controls, power sources, and related devices that are typically located in a compartment or module which is a significant distance away. This can be implemented by employing selected multiplexer and complementary de-multiplexer combinations in the scanner head and in the module. This technique reduces EMI noise, power loss, drag on the moving scanner heads carrying the sensors, and cost of construction.

La performance des systèmes de balayage peut être améliorée de manière significative par le remplacement du porte-câbles classique par, de préférence, seulement deux câbles ou deux canaux de transmission permettant d'établir une communication entre (i) les capteurs situés sur le chariot mobile du système de balayage et (ii) les commandes, les sources d'alimentation et les dispositifs associés qui sont typiquement situés dans un compartiment ou un module se trouvant à une distance significative. Cela peut être mis en uvre par l'utilisation de combinaisons sélectionnées d'un multiplexeur et d'un démultiplexeur complémentaire dans la tête du scanner et dans le module. Cette technique réduit le bruit parasite électromagnétique (EMI), la perte de puissance, la résistance de frottement exercée sur les têtes de scanner mobiles portant les capteurs et les coûts de fabrication.

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