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System for checking the single crossing of a controlled passage

  • US 7,898,384 B2
  • Filed: 01/25/2007
  • Issued: 03/01/2011
  • Est. Priority Date: 02/09/2006
  • Status: Expired due to Fees
First Claim
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1. A system for checking a single crossing of a controlled passage, comprising:

  • an intercepting booth (1);

    a first unit (2) for detecting a variation over time (t) of the weight (P) of one or more people (7) and/or things in a controlled passage (6) delimited by the intercepting booth (1);

    a second unit (3) for detecting a variation over time (t) of a capacitance (C) of an electrical capacitor, the electrical capacitor comprising two metal armours, the controlled passage (6) being located between the two metal armours; and

    an electronic programmed unit (8) with i) inputs (9) connected to at least the first unit (2) and the second unit (3), and ii) outputs (10) connected at least to an alarm unit (11) and to a device for controlling at least an opening and closing of a door (13) separating the controlled passage (6) from a protected area (14),wherein the electronic programmed unit is configured to compare a shape and amplitude of a first signal received from the first unit with a shape and amplitude of a second signal received from the second unit and, based upon the comparison, determine whether more than one person and/or thing has entered the intercepting booth (1) and, upon a positive determination that more than one person and/or thing has entered the intercepting booth (1), activate the alarm unit (11) and prevent an opening of the door (13).

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