Reading unit and marking card for optical mark reader

G - Physics – 06 – K

Patent

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Details

G06K 7/10 (2006.01) G06K 7/14 (2006.01)

Patent

CA 2454308

The present invention relates to a reading unit and a marking card for optical mark reader. The reading unit comprises a plurality of optical sensing devices (R1, R2, R3, R4 ...) corresponding to a plurality of marks (M1, M2, M3, M4 ...); and a plurality of counters (CT1, CT2, CT3, CT4 ...) for converting output signals to output values corresponding to an amount of light sensed, and for sending the output values to a central processing unit (CPU). The CPU performs an answer checking process by a logical calculation based on the output values from the counters (CT1, CT2, CT3, CT4 ...).

La présente invention concerne une unité de lecture et une carte de marquage pour lecteur optique de marque. Cette unité de lecture comprend une pluralité de dispositifs de détection optiques (R1, R2, R3, R4 ...) correspondant à une pluralité de marques (M1, M2, M3, M4 ...) et une pluralité de compteurs (CT1, CT2, CT3, CT4 ...) destinés à transformer des signaux de sortie en valeurs de sortie correspondant à une quantité de lumière captée et destinés à envoyer ces valeurs de sorties à une unité centrale (UC) de traitement. Cette UC effectue un processus de vérification de réponse par un calcul logique fondé sur les valeurs de sortie des compteurs (CT1, CT2, CT3, CT4 ...).

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