EP 0919969 A3 20000503 - Infra red intrusion detection system
Title (en)
Infra red intrusion detection system
Title (de)
Infrarot-Eindringdetektionssystem
Title (fr)
Système de détection d'intrusion à infrarouge
Publication
Application
Priority
GB 9725027 A 19971126
Abstract (en)
[origin: EP0919969A2] An infra red intrusion detection system employs a transmitter unit having a plurality of transmitters (At, Bt, Ct, Dt) arranged in a transmitter housing and a plurality of receivers (Ar, Br, Cr, Dr) arranged in a receiver housing that is separate from the transmitter housing. A transmitter controller (2, 4, 6, 8) causes the transmitters to transmits in a predetermined sequence and at a predetermined transmit rate. A receiver controller (20, 22, 24, 26) is arranged to read the receiver inputs in a predetermined sequence and at a predetermined receive rate. By arranging for the transmit and receive rates to be different, the need for a synchronising link between the transmitters and the receivers is avoided, thus providing simplification. <IMAGE>
IPC 1-7
IPC 8 full level
G08B 13/183 (2006.01)
CPC (source: EP)
G08B 13/183 (2013.01)
Citation (search report)
- [A] EP 0563516 A2 19931006 - CONTROL CARD SRL [IT]
- [A] DE 4338978 A1 19950518 - SICK OPTIK ELEKTRONIK ERWIN [DE]
- [A] GB 2278916 A 19941214 - INTELSEC SYSTEMS LTD [GB]
- [A] EP 0567717 A1 19931103 - REER SPA [IT]
- [A] WO 8907276 A1 19890810 - SICK ERWIN GMBH [DE]
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0919969 A2 19990602; EP 0919969 A3 20000503; EP 0919969 B1 20030702; AT E244433 T1 20030715; DE 69816001 D1 20030807; GB 9725027 D0 19980128
DOCDB simple family (application)
EP 98309021 A 19981104; AT 98309021 T 19981104; DE 69816001 T 19981104; GB 9725027 A 19971126