Electronic security device for access control by comparison and acoustic recognition of signatures

摘要

Electronic security and protection device allowing checking of and access for personnel. A plate 2 covered by striations in every direction on which a signature is formed with the aid of a rod 1. A microphone 3 fixed under the plate 2 has the job of picking up and transmitting the noise of the signature to the preamplifier 4 followed by a filter 5, by an A/D converter 6 and by a microprocessor 7. Memory storage of the noise of the acoustical print of a sample signature, stored on the tracks of a magnetic card and read with the aid of the card reader 9 or of an electronic memory 13, and the same signature executed directly on the plate 2 and sampled, will determine, with aid of the comparator 8, in the case where the two signatures coincide, either opening of a banknote dispenser, or the electrical opening of a door. In both cases there can be no forgery or reproduction. IMAGE