Global Patent Index - EP 0919969 A3

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

EP 0919969 A3 (EN)

Application

EP 98309021 A

Priority

GB 9725027 A

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

G08B 13/183

IPC 8 full level

G08B 13/183 (2006.01)

CPC (source: EP)

G08B 13/183 (2013.01)

Citation (search report)

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 244433 T 20030715; DE 69816001 D1 20030807; GB 9725027 D0 19980128

DOCDB simple family (application)

EP 98309021 A 19981104; AT 98309021 T 19981104; DE 69816001 A 19981104; GB 9725027 A 19971126