EP 1594099 B1 20080430 - Security sensor assembly
Title (en)
Security sensor assembly
Title (de)
Anordnung für einen Sicherheitssensor
Title (fr)
Ensemble détecteur de sécurité
Publication
Application
Priority
JP 2004138126 A 20040507
Abstract (en)
[origin: EP1594099A1] A security sensor assembly comprises an infrared beam detecting element (5) for detecting infrared rays of light coming from an intruder, a cover (6) for covering a front area forwardly of the infrared beam detecting element (5), a light transmitting element (11) for transmitting an obstructer detecting beam (L1) towards the cover (6), a light receiving element (12) for receiving a secondary beam (L2) of the obstructer detecting beam, which is reflected from or passed through the cover (6), a check circuit (24) for checking a receiving level of the light receiving element (12) at intervals of a predetermined period, and a first adjusting circuit (20) operable, when a received level of the secondary beam (L2) approaches an obstructer detecting threshold value, to adjust the received level so as to depart from the obstructer detecting threshold value. <IMAGE>
IPC 8 full level
G08B 13/19 (2006.01); G08B 13/193 (2006.01); G08B 29/04 (2006.01)
CPC (source: EP)
G08B 13/193 (2013.01); G08B 29/046 (2013.01)
Designated contracting state (EPC)
BE GB NL SE
DOCDB simple family (publication)
EP 1594099 A1 20051109; EP 1594099 B1 20080430; JP 2005321917 A 20051117; JP 4576525 B2 20101110
DOCDB simple family (application)
EP 05252717 A 20050429; JP 2004138126 A 20040507