A contraband sampling system with a preconcentrator filter...

Details A contraband sampling system with a preconcentrator filter... A contraband sampling system with a preconcentrator filter...

G - Physics

01

N

G01N 1/22 (2006.01) B01D 46/00 (2006.01) B01D 46/10 (2006.01) G01N 15/06 (2006.01)

Patent

CA 2644937

A method of detecting particles during inspection is provided. The method includes establishing a security checkpoint including a detection system, wherein the detection system includes a chamber defining a passage and includes a plurality of jets. The method also includes passing an individual through the passage, enhancing a convection plume including particles from the individual by blowing air through at least one of the plurality of jets, and absorbing the particles in a preconcentrator including a filter encased in a frame having a high thermal conductivity. Moreover, the method includes evaporating the particles absorbed in the preconcentrator and using a detector to determine whether the particles are from at least one of an explosive material and a narcotic substance.

L'invention concerne un procédé de détection de particules lors d'une inspection. Le procédé comporte les étapes consistant à: établir un point de contrôle de sécurité comprenant un système de détection, le système de détection comprenant une chambre définissant un passage et une pluralité de jets; faire passer une personne à travers le passage; renforcer un nuage de convection incluant des particules provenant de la personne en projetant de l'air par au moins un de la pluralité des jets; et absorber les particules dans un préconcentrateur comprenant un filtre logé dans un cadre qui présente une conductivité thermique élevée; évaporer les particules absorbées dans le préconcentrateur et utiliser un détecteur pour déterminer si les particules proviennent d'une matière explosive et/ou d'une matière narcotique.

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