EP 1045359 A1 20001018 - Monitoring apparatus and control apparatus for traffic signal lights
Title (en)
Monitoring apparatus and control apparatus for traffic signal lights
Title (de)
Überwachungseinrichtung und Steuereinrichtung für Signallampen
Title (fr)
Dispositif de surveillance et appareil de contrôle pour feux de signalisation
Publication
Application
Priority
EP 95916024 A 19950420
Abstract (en)
The invention relates to monitoring apparatus and control apparatus for fail-safe monitoring for normal operation of traffic signal lights provided at an intersection or the like where a plurality of roads intersect. The illumination conditions of respective signal lights are detected using a sensor device, and when the number of illuminated or non illuminated signal lights is a predetermined number, a normal judgment output of logic value 1 corresponding to a high energy condition is generated while when the number of illuminated or non illuminated signal lights is not the predetermined number, an abnormal judgment output of logic value 0 corresponding to a low energy condition is generated. As a result, in the case for example of a fault in the monitoring apparatus so that the output stops, the resultant output condition is the same as for a danger condition due to a signal light abnormality. Hence extremely safe signal light monitoring and control is possible with excellent fail-safe characteristics. <IMAGE>
IPC 1-7
IPC 8 full level
G08G 1/097 (2006.01)
CPC (source: EP)
G08G 1/097 (2013.01)
Citation (search report)
- [XA] FR 2672145 A1 19920731 - ELECTRICITE DE FRANCE [FR]
- [XA] GB 2012465 A 19790725 - PHILIPS NV
- [A] DE 3415143 A1 19841031 - PHILIPS NV [NL]
- [A] EP 0214692 A2 19870318 - PHILIPS NV [NL]
- [A] DE 2851050 A1 19800604 - MESSERSCHMITT BOELKOW BLOHM
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
DOCDB simple family (application)
EP 00201697 A 19950420