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Detector of unauthorised objects in a protected access zone

  • US 7,636,036 B2
  • Filed: 07/25/2006
  • Issued: 12/22/2009
  • Est. Priority Date: 07/26/2005
  • Status: Active Grant
First Claim
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1. A device for the detection of unauthorised liquid or solid substances in a zone with protected access, wherein said device includes the following in combination:

  • a support base (100) designed to receive a single foot, wearing a shoe, of an individual to be checked,emission/reception means (40) of an electromagnetic field at least at several frequencies in a specified range of frequencies,position marking means (400), on the support base (100), designed to impose a precise positioning of the foot, wearing the shoe, in relation to the emission/reception means (40),means (50) for measuring the complex impedance of the emission/reception means (40) influenced by a load consisting of the shoe and the shoe'"'"'s contents, representing the complex dielectric characteristics of the shoe and of the shoe'"'"'s contents, andmeans (50) for supplying information associated with the measured complex impedance and therefore with the nature of the contents of said shoe of the individual to be checked.

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