DEVICE AND METHOD FOR DETECTING AND COUNTING ARTICLES, RELEASED BY A FEEDER DEVICE, IN PARTICULAR SHEET ARTICLES RELEASED BY A SHEET FEEDER

摘要

A method and device for detecting and counting articles released by a feeder device, in particular sheet articles released by a sheet feeder are described. The device comprises: an electromagnetic resonator (11 ) fed by a signal generator (12), to generate an electromagnetic field in a passage region (9) of said sheet articles (3); a sensor (13) connected to the electromagnetic resonator (11 ) for detecting the induced disturbances in the electromagnetic field following the passage of one or more superimposed sheet articles (3); and a control unit (14) connected to the sensor (13) for calculating the number of sheet articles (3), which pass from time to time across the passage region (9). In particular, the electromagnetic resonator (11) is of recess type and in it an aperture (7) is made which makes said recess (8) communicating with the outside; whereby the resonator (11 ) is arranged so that the aperture (7) is disposed at the passage region (9).