Smoke detection device, method for detecting at least one smoke detection feature, and computer program

Patent metadata

Field	Value
Publication number	US-10121344-B2
Application number	US-201415028538-A
Country	US
Kind code	B2
Filing date	Sep 30, 2014
Priority date	Oct 11, 2013
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

The invention relates to a smoke detection device 1, said smoke detection device 1 being connectable to at least one monitoring camera 2 which is designed to capture images of a monitored area, said monitored area comprising at least one stationary lighting object 3. The smoke detection device comprises an analyzing device 4, said analyzing device 4 being designed to detect at least one smoke detection feature in the monitored area in order to detect smoke in the images. The analyzing device 4 detects the at least one lighting object in the images, and the analyzing device 4 detects a change of a light scattering of the at least one detected lighting object 3 as the at least one smoke detection feature.

First claim

The invention claimed is:

1. A smoke detection device comprising:
a connection configured to be connected to at least one monitoring camera, and
an evaluation device configured to
detect at least one smoke detection feature in a monitoring region for the purpose of smoke detection in images received from the at least one monitoring camera, wherein the at least one smoke detection feature is a change in a contour profile of the acquired light object detected by a comparison of a contour profile of a reference light object with the contour profile of the acquired light object, the contour profile of the reference light object having at least one corner region, wherein the evaluation device detects the at least one smoke detection feature as a rounding of the corner region of the acquired light object,
to acquire at least one light object in the images, and
to detect a change in a light scattering of the at least one acquired light object as the at least one smoke detection feature.

2. The smoke detection device as claimed in claim 1 , wherein the evaluation device is configured to acquire a light object region and a light scattering region as the acquired light object, wherein the evaluation device detects a change in the light scattering region as the change in the light scattering.

3. The smoke detection device as claimed in claim 2 , wherein the evaluation device is configured to keep available the reference light object having a reference light object region and/or a reference light scattering region, and to compare the reference light object with the acquired light object for the purpose of detecting the change in the light scattering.

4. The smoke detection device as claimed in claim 1 , wherein the corner region is arranged in an upper region of the reference light object with respect to the smoke rising direction.

5. The smoke detection device as claimed in claim 1 , wherein the at least one smoke detection feature further includes an enlargement of the acquired light object that is produced by the change in the light scattering.

6. The smoke detection device as claimed in claim 5 , wherein the at least one smoke detection feature is detected by a comparison of the circumference and/or the area of the reference light object with the circumference and/or the area of the acquired light object.

7. The smoke detection device as claimed in claim 2 , wherein the at least one smoke detection feature further includes a brightening of the light scattering region of the acquired light object that is produced by the change in the light scattering.

8. The smoke detection device as claimed in claim 1 , wherein the at least one smoke detection feature further includes a change in a contrast of the acquired light object that is produced by the change in the light scattering.

9. The smoke detection device as claimed in claim 1 wherein the smoke detection device comprises a display device, wherein the display device is designed to display the images, wherein the evaluation device is configured to communicate the detected smoke detection feature to the display device, wherein the display device is designed for the imaging display of the smoke detection feature in the images of the monitoring region.

10. The smoke detection device as claimed in claim 1 , wherein the acquired change in the light scattering is rejected as the smoke detection feature in the case where a predefined time limit value is undershot.

11. A method for detecting at least one smoke detection feature using a smoke detection device, in particular a smoke detection device as claimed in claim 1 , wherein an evaluation device of the smoke detection device acquires at least one light object in images, wherein the evaluation device detects a change in a light scattering of the at least one acquired light object as the at least one smoke detection feature, wherein the at least one smoke detection feature is a change in a contour profile of the acquired light object detected by a comparison of a contour profile of a reference light object with the contour profile of the acquired light object, the contour profile of the reference light object having at least one corner region, wherein the evaluation device detects the at least one smoke detection feature as a rounding of the corner region of the acquired light object, which change is produced by the change in the light scattering.

Assignees

• Bosch Gmbh Robert

Inventors

• Stadler Anton
• Kuhn Florian
• Windisch Tjark

Classifications

• G08B17/125 Primary

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

• H04N7/183

  for receiving images from a single remote source · CPC title

• G06K9/00771

  Physics · mapped topic

• G06V20/52

  Surveillance or monitoring of activities, e.g. for recognising suspicious objects (recognising microscopic objects G06V20/69) · CPC title