MULTI-THREAT DETECTION SYSTEM

• US 20160117898A1
• Filed: 12/09/2015
• Published: 04/28/2016
• Est. Priority Date: 06/20/2012
• Status: Active Grant

• Current Assignee: Apstec Systems Ltd.
• Original Assignee: Andrey Kuznetsov, Igor Gorshkov, Valery Averyanov
• Inventors: KUZNETSOV, Andrey, AVERYANOV, Valery, GORSHKOV, Igor
• Granted Patent: US 9,697,710 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06V 20/52 Surveillance or monitoring of activities, e.g. for recognising suspicious objects recognising microscopic objects G06V20/69
• CPC Class Codes: G06V 2201/05 Recognition of patterns representing particular kinds of hidden objects, e.g. weapons, explosives, drugs
• CPC Class Codes: G08B 13/196 using television cameras
• CPC Class Codes: G08B 21/02 Alarms for ensuring the safety of persons
• CPC Class Codes: H04N 13/239 using two 2D image sensors having a relative position equal to or related to the interocular distance H04N13/243 takes precedence
• CPC Class Codes: H04N 5/30 Transforming light or analogous information into electric information scanning details H04N3/00; cameras or camera modules comprising electronic image sensors, or control thereof H04N23/00; circuitry of solid-state image sensors [SSIS] or control thereof H04N25/00
• CPC Class Codes: H04N 5/32 Transforming X-rays cameras or camera modules for generating image signals from X-rays H04N23/30; circuitry of SSIS for transforming X-rays into image signals H04N25/30

Abstract

The present invention is a multi-modal security checkpoint. The security checkpoint can simultaneously scan for and identify hidden metallic (weapon and shrapnel), non-metallic (explosives and IED), and radioactive/nuclear threats. The security checkpoint can also perform long range facial recognition and detect suspected terrorists. The security checkpoint combines many threat detection technologies into one checkpoint that allows it to be robust and detect a large variety of threats including hidden weapons, explosives, dirty bombs, and other threats.

Claims

1. A complex security checkpoint, comprising:

a block 1 detecting a threat 1, which is explosives or Improvised Explosive Device (IED);

a block 2 detecting a threat 2 which is metal weapons;

a block 3 detecting a threat 3 which is radioactive and/or nuclear material;

a processing unit receiving data from all three blocks and determining a presence of any threat;

wherein data from the block 1 is used in determining the threats 1 and 2, the data from the block 2 is used to determine the threats 2 and 3;

an alarm which is starting in case of a threat presence;

wherein the alarm indicating a type of the threat;

1, 2 or 3.

2. The checkpoint of claim 1, further comprising:

a block 4 for a distant person face recognition; and

the processing unit compares an obtained data about the face with a database; and

the alarm is starting in case the person is from a list of suspicious people.

3. The checkpoint of claim 1, wherein the explosives are plastic explosives hidden under a garment;

and the block 1 performs measurement of a phase delay and an amplitude of a microwave (MW) radiation;

the radiation being irradiated by transmitters and reflected by the garment and a human body or passed through the garment.

4. The checkpoint of claim 3, wherein the threat 1 presence is determined by a difference in the phase delay in the MW radiation reflected from the human body compared to the phase delay in the MW radiation reflected from the garment, and if the difference indicates an occurrence of a medium with dielectric permittivity greater than 3, then the threat 1 presence is suspected.

5. The checkpoint of claim 3, wherein the threat 1 presence is determined by a difference in the phase delay in the MW radiation passed through a space between the garment and the human body and the phase delay in the MW radiation passed through the same distance without presence of any objects on its way, and if the difference indicates an occurrence of a medium with dielectric permittivity greater than 3, then the threat 1 presence is suspected.

6. The checkpoint of claim 3, wherein the transmitter radiated the radiation in a cone angle more than 50 degrees thus covering a whole checking zone simultaneously without any mechanical movements of the transmitter.

7. The checkpoint of claim 6, wherein the checking zone is at least 5 meters×

10 meters×

2 meters.

8. The checkpoint of claim 6, wherein the processing unit adds a digital lens during data processing thus creating a set of virtual parallel MW beams which simultaneously illuminate the checking zone.

9. The checkpoint of claim 8, wherein at least one transmitter is a matrix of at least 16×

16 emitters.

10. The checkpoint of claim 8, further comprising at least two transmitters and at least one MW receiver;

and a data obtained by the receiver or receivers providing information about the checking zone without areas hidden from view.

11. The checkpoint of claim 3, wherein the block 2 receives the MW radiation using a first polarization receiver;

the polarization receiver includes a first polarizer which passes through only MW radiation with polarization turned 90 degrees compared to an initial polarization of the radiation irradiated by the transmitters.

12. The checkpoint of claim 11, further comprising a second polarization receiver;

the second polarization receiver includes a second polarizer which passes through only MW radiation with polarization the same as the initial polarization of the radiation irradiated by the transmitters, and the processing unit overlaps images obtained with orthogonal polarizations and provides a position of the threat.

13. The checkpoint of claim 12, wherein the second polarization receiver is the one that is used for data collection in block 1.

14. The checkpoint of claim 11, wherein the explosives are plastic explosives with metal inclusions or shrapnel and simultaneously the blocks 1 and 2 produce data, which leads to the alarm indicating both threat 1 and 2.

15. The checkpoint of claim 11, further comprising a video recording using at least one camera;

and the processing unit overlaps a MW image and a video image; and

a probability of the threat 1 is increased if an object causing the alarm is located near waist area.

16. The checkpoint of claim 11, wherein the processing unit compares a response of a metal object causing the alarm with a database of responses to a metallic threat, metal weapon, or metallic shrapnel.

17. The checkpoint of claim 1, wherein the block 3 includes a spectroscopic device for detecting radioactive and/or nuclear material, which provides an energy spectra of gamma-ray sources detected, thus allowing to eliminate naturally occurring radioactive materials and reduce false alarm.

18. The checkpoint of claim 17, wherein the block 1 detecting a presence of explosive material, and the alarm indicates simultaneous presence of the threat 1 and 3 pointing to dirty bombs.