SYSTEM AND METHOD OF ANOMALY DETECTION

• US 20140266683A1
• Filed: 03/13/2013
• Published: 09/18/2014
• Est. Priority Date: 03/13/2013
• Status: Active Grant

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Vacha, Pavel, Libal, Vit, Guralnik, Valerie
• Granted Patent: US 8,941,484 B2
• Time in Patent Office: Days
• US Class Current: 340/521
• CPC Class Codes: G08B 25/008 Alarm setting and unsetting, i.e. arming or disarming of the security system
• CPC Class Codes: G08B 29/188 Data fusion; cooperative systems, e.g. voting among different detectors
• CPC Class Codes: G08B 31/00 Predictive alarm systems characterised by extrapolation or other computation using updated historic data

Abstract

A method and apparatus wherein the method includes detecting a plurality of events within a security system, evaluating the events using one of a first expression defined by Σ_rεQconƒ(ƒ(r)−mrg(r)), a second expression defined by ∫_rεR|ƒ(r)−mrg(r)|dr and a third expression defined by ∫_rεRconƒ(ƒ(r)−mrg(r))dr, where r is a size of a neighborhood around a data point, f(r) is a Local Correlation Integral (LOCI) of r, mrg(r) is a margin of r, R is a predetermined set of intervals of neighborhood sizes, Q is a predetermined discrete set of neighborhood sizes and conf(d) is a non-linear confidence function being 0 for near distance to the data point and quickly approaching 1 for larger distances, comparing a value of the evaluated expression with a threshold value and setting an alarm upon detecting that the value exceeds the threshold value.

Claims

1. A method comprising:

detecting a plurality of events within a security system;

evaluating the events using one of a first expression defined by Σ

<sub>rε

Q</sub>conƒ

(ƒ

(r)−

mrg(r)), a second expression defined by ∫

<sub>rε

R</sub>|ƒ

(r)−

mrg(r)|dr and a third expression defined by ∫

<sub>rε

R</sub>conƒ

(ƒ

(r)−

mrg(r))dr, where r is a size of a neighborhood around a data point, f(r) is a Local Correlation Integral (LOCI) of r, mrg(r) is a margin of r, R is a predetermined set of intervals of neighborhood sizes, Q is a predetermined discrete set of neighborhood sizes and conf(d) is a non-linear confidence function being 0 for near distance to the data point and quickly approaching 1 for larger distances;

comparing a value of the evaluated expression with a threshold value; and

setting an alarm upon detecting that the value exceeds the threshold value.

2. The method as in claim 1 wherein the detected events further comprise physical entry by a plurality of person through a plurality of portals, each portal having an electric lock that controls physical entry by the plurality of persons into a secured area of the security system.

3. The method as in claim 2 further comprising a time of entry through one of the plurality of portals.

4. The method as in claim 1 further comprising a time of entry of an authorized user into the secured area.

5. The method as in claim 1 wherein the detected events further comprise activation of a plurality of security sensors within a secured area of the security system.

6. The method as in claim 5 wherein the detected events further comprise a time between activation of each of the plurality of sensors of the security system.

7. The method as in claim 5 wherein the detected events further comprise detection of motion within the secured area.

8. An apparatus comprising:

an event processor that detects a plurality of events within a security system;

an evaluation processor that evaluates the events using one of a first expression defined by Σ

<sub>rε

Q</sub>conƒ

(ƒ

(r)−

mrg(r)), a second expression defined by ∫

<sub>rε

R</sub>|ƒ

(r)−

mrg(r)|dr and a third expression defined by ∫

<sub>rε

R</sub>conƒ

(ƒ

(r)−

mrg(r))dr, where r is a size of a neighborhood around a data point, f(r) is a Local Correlation Integral (LOCI) of r, mrg(r) is a margin of r, R is a predetermined set of intervals of neighborhood sizes, Q is a predetermined discrete set of neighborhood sizes and conf(d) is a non-linear confidence function being 0 for near distance to the data point and quickly approaching 1 for larger distances;

a comparison processor that compares a value of the evaluated expression with a threshold value; and

an alarm processor that sets an alarm upon detecting that the value exceeds the threshold value.

9. The apparatus as in claim 8 wherein the detected events further comprise physical entry by a plurality of person through a plurality of portals, each portal having an electric lock that controls physical entry by the plurality of persons into a secured area of the security system.

10. The apparatus as in claim 9 wherein the detected events further comprise a time of entry through one of the plurality of portals.

11. The apparatus as in claim 8 further comprising a time of entry of an authorized user into the secured area.

12. The apparatus as in claim 8 wherein the detected events further comprise activation of a plurality of security sensors within a secured area of the security system.

13. The apparatus as in claim 12 wherein the detected events further comprise a time between activation of each of the plurality of sensors of the security system.

14. The apparatus as in claim 12 wherein the detected events further comprise detection of motion within the secured area.

15. An apparatus comprising:

a security system that protects a secured area having a plurality of zones;

a processor that detects a plurality of events within the security system including at least entry into at some of the plurality of zones;

a processor that evaluates the events using one of a first expression defined by Σ

<sub>rε

Q</sub>conƒ

(ƒ

(r)−

mrg(r)), a second expression defined b ∫

<sub>rε

R</sub>|ƒ

(r)−

mrg(r)|dr and a third expression defined by ∫

<sub>rε

R</sub>conƒ

(ƒ

(r)−

mrg(r))dr, where r is a size of a neighborhood around a data point, f(r) is a Local Correlation Integral (LOCI) of r, mrg(r) is a margin of r, R is a predetermined set of intervals of neighborhood sizes, Q is a predetermined discrete set of neighborhood sizes and conf(d) is a non-linear confidence function being 0 for near distance to the data point and quickly approaching 1 for larger distances;

a processor that compares a value of the evaluated expression with a threshold value; and

a processor that sets an alarm upon detecting that the value exceeds the threshold value.

16. The apparatus as in claim 15 wherein the detected events further comprise physical entry by a plurality of person through a plurality of portals, each portal having an electric lock that controls physical entry by the plurality of persons into a secured area of the security system.

17. The apparatus as in claim 16 wherein the detected events further comprise a time of entry through one of the plurality of portals.

18. The apparatus as in claim 15 further comprising a processor that compares values from at least two of the expressions with a respective threshold value and sets an alarm upon detecting that they both exceed the respective threshold.

19. The apparatus as in claim 15 further comprising a processor that compares values from all three of the expressions with a respective threshold value and sets an alarm upon detecting that they all exceed the respective threshold.