A detection system and a detection method based on pulsed...

G - Physics – 01 – N

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G01N 23/204 (2006.01) G01N 23/222 (2006.01) G01V 5/00 (2006.01)

Patent

CA 2659304

A detection system, comprises - a particle source (500) for generating a pulsed flux of energetic particles including both neutrons and gamma photons and for directing said flux (140) towards an item (600) to be analyzed, said particles being intended to react with nuclei of material(s) in said item, - a detection unit (400) comprising at least three detector assemblies responsive to neutrons and gamma photons in respective energy ranges coming from said item and impinging thereon in response to said flux of energetic particles and capable of delivering corresponding time signals, and - a data processing unit (800) connected to the outputs of said detectors, capable of generating a signature from said signals following the application of said pulsed flux to said item, including time-related signal features, and for comparing said signature with stored reference signatures. The present invention also provides a corresponding dection method. Application in particular to airport luggage security clearance, landmine detection, etc.

Système de détection comprenant - une source de particules (500) destinée à générer un flux pulsé de particules énergétiques qui comprend des neutrons et des gamma photons et à orienter ledit flux (140) vers un objet (600) à analyser, lesdites particules étant destinées à réagir avec des noyaux de matériau(x) dans ledit objet ; - une unité de détection (400) comprenant au moins trois ensembles de détection réagissant aux neutrons et aux gamma photons dans des plages d'énergie respectives provenant dudit objet et les heurtant en réponse audit flux de particules énergétiques, et capable de délivrer des signaux temporels correspondants ; et - une unité de traitement de données (800) reliée aux sorties desdits détecteurs, capable de générer une signature à partir desdits signaux après l'application dudit flux pulsé audit objet, comprenant des caractéristiques de signe liées au temps, et destinée à comparer ladite signature avec des signatures de référence stockées. La présente invention concerne également un procédé de détection correspondant. Leur application concerne en particulier les points de contrôle de sécurité des bagages dans les aéroports, la détection des mines, etc.

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