EP 0559357 A1 19930908 - Monitoring system.
Title (en)
Monitoring system.
Title (de)
Überwachungssystem.
Title (fr)
Système de surveillance.
Publication
Application
Priority
ZA 921621 A 19920304
Abstract (en)
A monitoring apparatus and a method of monitoring a zone are disclosed. A plurality of beams (14) are transmitted between at least two locations (12.2,12.2) defining extremities of the zone. Interruptions of the beams (14) caused by an object moving between the two locations are detected by sensing means and a graph of the interruptions relative to time is generated. The graph generated is compared with a set of preselected graphs representative of known objects stored in storage means (34). <IMAGE>
IPC 1-7
IPC 8 full level
G07C 9/00 (2006.01); G08B 13/183 (2006.01)
CPC (source: EP)
G07C 9/00 (2013.01); G08B 13/183 (2013.01)
Citation (search report)
- [Y] WO 8800745 A1 19880128 - GATE KEITH JEFFREY [AU]
- [Y] EP 0118182 A2 19840912 - PATTERN PROCESSING CORP [US]
- [A] US 3898639 A 19750805 - MUNCHERYAN HRAND M
- [A] US 3825916 A 19740723 - STEELE R, et al
- [A] DE 2940414 A1 19810409 - LICENTIA GMBH [DE]
- [AP] FR 2670404 A1 19920619 - DASSAULT ELECTRONIQUE [FR]
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 93301284 A 19930222; ZA 929406 A 19921203