公开(公告)号：EP1407248B1

公开(公告)日：2010-05-12

申请号：EP02737710.0

申请日：2002-06-17

申请人： SIEMENS AKTIENGESELLSCHAFT

发明人： WIESER, Dieter ,  MÜLLER, Kurt ,  BRUPBACHER, Thomas ,  VOLLENWEIDER, Walter ,  LOEPFE, Markus

IPC分类号： G06T7/20 ,  G08B13/194 ,  G08B17/12 ,  G08B29/14

CPC分类号： G08B13/19602 ,  G01N21/532 ,  G06T7/20 ,  G08B17/125

摘要： The invention relates to a video smoke detection system that comprises a camera (1) for recording video images and a signal processing stage (2) in which the brightness of the individual pixels or groups of pixels of the video images is determined. The inventive method is characterized by obtaining a value representative of the brightness of the pixels and examining said value in its temporal progression for changes that are characteristic of the occurrence of smoke. For an examination of the system for the purpose of a performance check or calibration, the signal of the camera (1) can be influenced in such a manner that a change of the video signal characteristic of the occurrence of smoke is simulated to the signal processing stage (2), namely by means of the element reducing the contrast of the video signal.

公开(公告)号：EP2252984B1

公开(公告)日：2012-07-25

申请号：EP09713205.4

申请日：2009-02-19

申请人： Siemens Aktiengesellschaft

发明人： VOLLENWEIDER, Walter

IPC分类号： G08B29/18 ,  G08B17/103

CPC分类号： G08B29/22 ,  G01N2021/4709 ,  G08B17/103 ,  G08B17/113

摘要： A sensor apparatus for optically detecting an object (6) is described. The sensor apparatus comprises (a) a first transmitting device (3), configured to issue a first transmission beam, (b) a first receiving device (11), configured to receive a first reception beam, (c) a second receiving device (12), configured to receive a second reception beam, and (d) an evaluation unit (16) that is connected downstream of the first receiving device (11) and the second receiving device (12). The first reception beam and/or the second reception beam comprises scattered light which is produced when an at least partial scattering of the first transmission beam occurs at the object (6). Further, the evaluation unit (16) is coupled to the first receiving device (11) and the second receiving device (12) such that a difference signal between a first output signal of the first receiving device (11) and a second output signal of the second receiving device (12) can be fed to the evaluation unit (16). Further, a proximity sensor and a danger annunciator are described, each of which comprises said sensor apparatus.

公开(公告)号：EP2252984A1

公开(公告)日：2010-11-24

申请号：EP09713205.4

申请日：2009-02-19

申请人： Siemens Aktiengesellschaft

发明人： VOLLENWEIDER, Walter

IPC分类号： G08B17/103 ,  G08B29/04

CPC分类号： G08B29/22 ,  G01N2021/4709 ,  G08B17/103 ,  G08B17/113

摘要： A sensor apparatus for optically detecting an object (6) is described. The sensor apparatus comprises (a) a first transmitting device (3), configured to issue a first transmission beam, (b) a first receiving device (11), configured to receive a first reception beam, (c) a second receiving device (12), configured to receive a second reception beam, and (d) an evaluation unit (16) that is connected downstream of the first receiving device (11) and the second receiving device (12). The first reception beam and/or the second reception beam comprises scattered light which is produced when an at least partial scattering of the first transmission beam occurs at the object (6). Further, the evaluation unit (16) is coupled to the first receiving device (11) and the second receiving device (12) such that a difference signal between a first output signal of the first receiving device (11) and a second output signal of the second receiving device (12) can be fed to the evaluation unit (16). Further, a proximity sensor and a danger annunciator are described, each of which comprises said sensor apparatus.