Fire detection apparatus, method for evaluating at least one fire detection feature and computer program

Patent metadata

Field	Value
Publication number	US-9691247-B2
Application number	US-201414472639-A
Country	US
Kind code	B2
Filing date	Aug 29, 2014
Priority date	Aug 29, 2014
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

A fire detection apparatus 1 including a wind ascertainment device 6 and an evaluation device 3 , and connectable to at least one monitoring camera 2 for recording image data of a monitoring region. The evaluation device 3 includes a control unit 7 , configured for evaluation of wind parameters provided by the wind ascertainment device 6 . The evaluation device 3 includes an image processing unit 4 configured to evaluate at least one fire detection feature from the image data transmitted from the monitoring camera 2 , wherein the control unit 7 switches the image processing unit 4 to different fire detection operation modes in dependence on the wind parameters.

First claim

The invention claimed is:

1. A fire detection apparatus ( 1 ),
wherein the fire detection apparatus ( 1 ) is connectable to at least one monitoring camera ( 2 ) for recording image data of a monitoring region,
having a wind ascertainment device ( 6 ) for capturing one or more wind parameters in the monitoring region,
having an evaluation device ( 3 ),
wherein the evaluation device ( 3 ) comprises a control unit ( 7 ), wherein the control unit ( 7 ) is configured for evaluation of the wind parameter data on the basis of the wind ascertainment device ( 6 ),
wherein the evaluation device ( 3 ) comprises an image processing unit ( 4 ),
characterized in that
the image processing unit ( 4 ) is configured to evaluate at least one fire detection feature from the image data transmitted from the monitoring camera ( 2 ),
wherein the control unit ( 7 ) switches the image processing unit ( 4 ) to different fire detection operation modes in dependence on the wind parameters.

2. The fire detection apparatus ( 1 ) according to claim 1 , characterized in that the wind ascertainment device ( 6 ) comprises at least one electrical wind measuring device ( 6 a ), wherein the at least one electrical wind measuring device ( 6 a ) is connected to the control unit ( 7 ) for transmitting the wind parameters.

3. The fire detection apparatus ( 1 ) according to claim 1 , characterized in that the wind ascertainment device ( 6 ) comprises at least one wind indication module ( 6 b ), wherein the wind parameters are ascertainable by ascertaining the position state of the wind indication module ( 6 b ) using the at least one monitoring camera ( 2 ).

4. The fire detection apparatus ( 1 ) according to claim 3 , characterized in that the at least one wind indication module ( 6 b ) is configured as a wind sock.

5. The fire detection apparatus ( 1 ) according to claim 1 , characterized in that the at least one fire detection feature is the movement direction of a rising smoke cloud ( 5 ).

6. Fire detection apparatus ( 1 ) according to claim 1 , characterized in that the image processing unit ( 4 ) is switched to a fire detection active mode as one of the fire detection operation modes.

7. The fire detection apparatus ( 1 ) according to claim 6 , characterized in that the image processing unit ( 4 ) in the fire detection active mode is switched to a calm-wind mode if the wind speed falls below a threshold value.

8. The fire detection apparatus ( 1 ) according to claim 7 , characterized in that the image processing unit ( 4 ) enters a calm-wind mode to perform fire detection when a captured rising smoke cloud ( 5 ) is a vertically oriented column.

9. The fire detection apparatus ( 1 ) according to claim 6 , characterized in that the image processing unit ( 4 ) in the fire detection active mode is switched to a wind mode when a laminar wind flow is captured.

10. The fire detection apparatus ( 1 ) according to claim 9 , characterized in that the image processing unit enters a wind mode to perform fire detection when a captured rising smoke cloud ( 5 ) is a column oriented at an angle to vertical.

11. The fire detection apparatus ( 1 ) according to claim 6 , characterized in that the image processing unit is switched to the fire detection passive mode when a turbulent wind flow is captured.

12. Fire detection apparatus ( 1 ) according to claim 1 , characterized in that the image processing unit ( 4 ) is switched to a fire detection passive mode as one of the fire detection operation modes.

13. The fire detection apparatus ( 1 ) according to claim 12 , characterized in that the image processing unit ( 4 ) in the fire detection active mode is switched to a calm-wind mode if the wind speed falls below a threshold value.

14. The fire detection apparatus ( 1 ) according to claim 13 , characterized in that the image processing unit ( 4 ) enters a calm-wind mode to perform fire detection when a captured rising smoke cloud ( 5 ) is a vertically oriented column as the rising smoke cloud ( 5 ).

15. The fire detection apparatus ( 1 ) according to claim 12 , characterized in that the image processing unit ( 4 ) in the fire detection active mode is switched to a wind mode when a laminar wind flow is captured.

16. The fire detection apparatus ( 1 ) according to claim 15 , characterized in that the image processing unit enters a wind mode to perform fire detection when a captured rising smoke cloud ( 5 ) is a column oriented at an angle to vertical.

17. The fire detection apparatus ( 1 ) according to claim 1 , wherein the one or more wind parameters includes a wind speed.

18. The fire detection apparatus ( 1 ) according to claim 1 , wherein the one or more wind parameters includes a wind direction.

19. A method for evaluating the at least one fire detection feature using a fire detection apparatus ( 1 ) according to claim 1 , wherein the wind ascertainment device ( 6 ) captures the wind speeds and/or the wind directions in the monitoring region, wherein the control unit ( 7 ) evaluates the wind speed data and/or wind direction data captured on the basis of the wind ascertainment device ( 6 ), wherein the image processing unit ( 4 ) evaluates the at least one fire detection feature from the image data transmitted from the monitoring camera ( 2 ), wherein the image processing unit ( 4 ) detects a fire in the monitoring region, wherein the control unit ( 7 ) switches the image processing unit ( 4 ) to different fire detection modes in dependence on the wind speed data and/or wind direction data.

20. A non-transitory computer readable medium including a computer program including instructions for carrying out all the steps of the method according to claim 19 , when the program is executed on the fire detection apparatus ( 1 ).

Assignees

• Bosch Gmbh Robert

Inventors

• Stadler Anton

Classifications

• G01B11/00

  Measuring arrangements characterised by the use of optical techniques · CPC title

• G08B17/125 Primary

  by using a video camera to detect fire or smoke · CPC title