Method and apparatus for deciding whether to issue an alarm signal in a security system

• US 20060226971A1
• Filed: 04/11/2005
• Published: 10/12/2006
• Est. Priority Date: 04/11/2005
• Status: Active Grant

• Current Assignee: Bosch Security Systems Incorporated (Robert Bosch GmbH), Robert Bosch GmbH
• Original Assignee: Bosch Security Systems Incorporated (Robert Bosch GmbH), Robert Bosch GmbH
• Inventors: Petricoin, Dennis, Caler, Dennis M., Hayden, Craig A., Markham, Steven A.
• Granted Patent: US 7,298,253 B2
• Time in Patent Office: Days
• US Class Current: 340/517
• 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

Abstract

A method of operating a security system includes providing a plurality of sensors, and detecting at least one event with the sensors. A decision whether to initiate an alarm signal is dependent upon the detecting by each of the sensors, which of the sensors has detected the at least one event, and what nonzero number of times a first of the sensors has detected the at least one event.

Claims

1. A method of operating a security system, said method comprising the steps of:

providing a plurality of sensors;

detecting at least one event with said sensors; and

deciding whether to initiate an alarm signal, said deciding being dependent upon;

said detecting by each of said sensors;

which of said sensors has detected the at least one event; and

what nonzero number of times a first of said sensors has detected the at least one event.

2. The method of claim 1 wherein said deciding step is dependent upon a mode in which said security system is operating.

3. The method of claim 1 wherein said deciding step is dependent upon whether said security system is operating in a Stay mode or an Away mode.

4. The method of claim 1 wherein said deciding step is dependent upon points in time at which said sensors detect the at least one event.

5. The method of claim 1 wherein said deciding step is dependent upon a time period in which said sensors detect the at least one event.

6. The method of claim 1 comprising the further step of assigning a numerical value to each of the event detections by said sensors, the numerical values being dependent upon which of said sensors made the event detection, said deciding step being dependent upon a sum of the numerical values.

7. The method of claim 6 wherein the alarm signal is issued if the sum of the numerical values has a predetermined relationship to a threshold value.

8. The method of claim 1 wherein said deciding step is dependent upon what nonzero number of times a second of said sensors has detected the at least one event.

9. The method of claim 1 wherein said deciding step is dependent upon what multiple number of times said first of said sensors has detected the at least one event.

10. The method of claim 1 wherein said deciding step is:

dependent upon a whether a second of said sensors has detected the at least one event; and

independent of what nonzero number of times said second sensor has detected the at least one event.

11. A security system comprising:

a plurality of sensors, each of said sensors being configured to detect at least one event; and

a control device in communication with said sensors and configured to decide whether to initiate an alarm signal dependent upon;

said detecting by each of said sensors;

which of said sensors has detected the at least one event; and

what nonzero number of times a first of said sensors has detected the at least one event.

12. The system of claim 11 wherein said control device is configured to issue an alarm signal dependent upon a mode in which said security system is operating.

13. The system of claim 11 wherein said control device is configured to initiate an alarm signal dependent upon whether said security system is operating in a Stay mode or an Away mode.

14. The system of claim 11 wherein said control device is configured to initiate an alarm signal dependent upon points in time at which said sensors detect the at least one event.

15. The system of claim 11 wherein said control device is configured to initiate an alarm signal dependent upon a time period in which said sensors detect the at least one event.

16. The system of claim 11 wherein said control device is configured to:

assign a numerical value to each of the event detections by said sensors, the numerical values being dependent upon which of said sensors made the event detection; and

initiate the alarm signal dependent upon a sum of the numerical values.

17. The system of claim 16 wherein said control device is configured to initiate the alarm signal if the sum of the numerical values has a predetermined relationship to a threshold value.

18. The system of claim 11 wherein said control device is configured to initiate an alarm signal dependent upon what nonzero number of times a second of said sensors has detected the at least one event.

19. The system of claim 11 wherein said control device is configured to initiate an alarm signal:

dependent upon a whether a second of said sensors has detected the at least one event; and

independent of what nonzero number of times said second sensor has detected the at least one event.

20. A method of operating a security system, said method comprising the steps of:

providing a plurality of sensors;

categorizing each of said sensors in one of at least two categories;

detecting at least one event with said sensors; and

issuing an alarm signal dependent upon said detecting step, wherein a sensor of a first of the categories must detect the at least one event twice in order to cause the alarm signal to be issued, and a sensor of a second of the categories may cause the alarm signal to be issued by detecting the at least one event only once.

21. The method of claim 20 wherein said security system is operating in an Away mode.

22. The method of claim 21 comprising the further steps of:

switching said security system to a Stay mode of operation; and

deciding in the Stay mode whether to issue an alarm signal dependent upon said detecting step, wherein a sensor of a third of the categories must detect the at least one event three times in order to cause the alarm signal to be issued.

23. The method of claim 20 wherein said issuing step is dependent upon points in time at which said sensors detect the at least one event.

24. The method of claim 20 wherein said issuing step is dependent upon a time period in which said sensors detect the at least one event.

25. The method of claim 20 comprising the further step of assigning a numerical value to each of the event detections by said sensors, the numerical values being dependent upon which of said sensors made the event detection, said issuing step being dependent upon a sum of the numerical values.

26. The method of claim 25 wherein the alarm signal is issued if the sum of the numerical values has a predetermined relationship to a threshold value.

27. A method of operating a security system, said method comprising the steps of:

providing a plurality of sensors; and

deciding whether to initiate an alarm signal dependent upon whether said security system is operating in a Stay mode or an Away mode, wherein each of said sensors is capable in each of the operating modes of independently causing a decision to initiate an alarm signal.

28. The method of claim 27 comprising the further step of detecting at least one event with said sensors, wherein a decision to initiate an alarm signal may be caused by said detecting by any one of said sensors independently.

29. The method of claim 28 wherein a single detection of the at least one event by a first of said sensors is sufficient to cause a decision to initiate an alarm signal in the Stay mode, and two detections of the at least one event by said first sensor is required to cause a decision to initiate an alarm signal in the Away mode.

30. The method of claim 27 wherein said deciding step is dependent upon points in time at which said sensors detect the at least one event.

31. The method of claim 27 wherein said deciding step is dependent upon a time period in which said sensors detect the at least one event.

32. The method of claim 27 comprising the further step of assigning a numerical value to each of at least one event detection by said sensors, the numerical values being dependent upon which of said sensors made the event detection and in which of the operating modes said security system is operating, said deciding step being dependent upon a sum of the numerical values.

33. The method of claim 32 wherein the alarm signal is issued if the sum of the numerical values has a predetermined relationship to a threshold value.