Method and device for the detection of recording media
AssigneePepperl + Fuchs GmbH
InventorDierk Schoen
Life of this patent
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Abstract
The invention relates to a method and a device for the contactless detection of laminated, flat objects, particularly sheet-like recording media. There is a galvanic separation and mechanical decoupling between the transmitter and receiver to improve detection. These measures can be further improved with correction characteristic methods.
Claims38
Method for the contactless detection of laminated, flat objects, particularly sheet-like recording media, relative to separated single, multiple or missing sheets of recording media, the recording media intersecting a radiation path of at least one transmitter and an associated receiver of an ultrasonic sensor device and in which radiation transmitted by the recording media or radiation received in a case of a missing sheet by the receiver is received as a measuring signal, which is supplied to a following evaluation for generating a corresponding detection signal, at least the transmitting signal on the transmitter side is generated in a galvanically separated manner from the receiver by eliminating any voltage signal paths and any current signal paths between the transmitter and the receiver, and the transmitter and receiver are vibrationally decoupled from one another.
Device for the contactless detection of laminated, flat objects, particularly sheet-like recording media, with respect to separated single, multiple or missing sheets of the recording media, with at least one ultrasonic sensor device having at least one transmitter and associated receiver, the recording media to be detected intersecting a radiation path between the transmitter and the receiver, the receiver receiving radiation transmitted by the recording media or radiation received in a case of a missing sheet as a measuring signal, with a downstream evaluating device, to which is supplied the measuring signal for generating a detection signal, wherein the transmitter is galvanically separated and vibrationally decoupled from the receiver of the ultrasonic sensor device, or at least the transmitting signal is generated in a galvanically separated manner decoupled from the receiver, wherein the galvanic separation is provided by eliminating any voltage signal paths or current signal paths between the transmitter and the receiver.
Dependencies are inferred from the claim text.