Entry or exit control method for protected area e.g. hospital nursery, has interference caused by simultaneous detection of codes from 2 different sources identified as permitted entry or exit of 2 persons or objects

摘要

The entry or exit control method has a code transmitter attached to each person or movable object, with specified codes (A1-A6) detected for providing a warning signal indicating an unauthorised entry or exit to or from the protected area (S). An interference caused by simultaneous reception of 2 different codes from respective signal sources can be identified as an authorised entry or exit of 2 persons or objects. An Independent claim for an entry or exit control device is also included.