Detection of concealed explosives and contraband
First Claim
1. A method of screening individuals for contraband at security check points, comprising:
- providing each individual with an identification code;
directing the individual through at least a first detection station;
detecting the presence of metallic objects with at least one detector at said first detection station;
providing comparison images of known contraband in a database;
converting signals received from said detector to images indicative of a detected object;
processing said detected images and said identification for each individual;
comparing said detected images with said comparison images;
annunciating the presence of contraband if a match is found;
directing the individual to a second detection station;
subjecting the individual to ultrasonic interrogation at said second detection station for detecting non-metallic contraband;
determining whether irregularities in a body surface of the individual are present;
clearing the individual if no irregularities are found; and
annunciating the presence of contraband and segregating the individual if irregularities are found.
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Accused Products
Abstract
The invention is a detector for detection of concealed explosives, drugs and contraband using x-rays imaging and powder pattern techniques and ultrasonics. In case of inspection of carry-on baggage a combination of computer-aided x-ray transmission imaging and x-ray diffraction analysis is used to screen, confirm and localize threats. The x-ray transmission is used to segregate dense baggage and cargo which are inspected by x-ray backscatter imaging to identify suspicious objects. All suspicious objects are carefully analyzed by x-ray diffraction. In another embodiment a slow processing system uses diffraction for identification of threats and x-ray radiography for localization of the objects. In case of drugs concealed in compartments aboard marine vessels or air crafts a hand-held x-ray system is disclosed which can be used in three modes of operation: x-ray transmission, x-ray backscatter, or x-ray diffraction dependent on the architecture of the compartment. In case of buried mines an oscillating dual-energy x-ray backscatter imaging is used for antipersonnel mines and a combination of x-ray backscatter imaging and prompt gamma detectors is used for antivehicle and antiaircraft mines. Ultrasonic detectors are disclosed for detection of explosives on persons. Also, a tracking system based on bar-code identification system and a central computer is disclosed for baggage.
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Citations
4 Claims
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1. A method of screening individuals for contraband at security check points, comprising:
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providing each individual with an identification code; directing the individual through at least a first detection station; detecting the presence of metallic objects with at least one detector at said first detection station; providing comparison images of known contraband in a database; converting signals received from said detector to images indicative of a detected object; processing said detected images and said identification for each individual; comparing said detected images with said comparison images; annunciating the presence of contraband if a match is found; directing the individual to a second detection station; subjecting the individual to ultrasonic interrogation at said second detection station for detecting non-metallic contraband; determining whether irregularities in a body surface of the individual are present; clearing the individual if no irregularities are found; and annunciating the presence of contraband and segregating the individual if irregularities are found. - View Dependent Claims (2, 3, 4)
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Specification