EP 0638194 A1 19950215 - DEVICE FOR TESTING THE OPERATABILITY OF SPEED-MEASUREMENT DEVICES USED IN TRAFFIC CONTROL.
Title (en)
DEVICE FOR TESTING THE OPERATABILITY OF SPEED-MEASUREMENT DEVICES USED IN TRAFFIC CONTROL.
Title (de)
VORRICHTUNG ZUR ÜBERPRÜFUNG DER FUNKTIONSFÄHIGKEIT VON GESCHWINDIGKEITS-MESSEINRICHTUNGEN FÜR DIE VERKEHRSÜBERWACHUNG.
Title (fr)
DISPOSITIF DE CONTROLE DE L'APTITUDE AU FONCTIONNEMENT DE DISPOSITIFS DE MESURE DE LA VITESSE UTILISES DANS LA SURVEILLANCE DE LA CIRCULATION.
Publication
Application
Priority
- DE 4214595 A 19920430
- EP 9301035 W 19930429
Abstract (en)
[origin: WO9322756A1] Stationary speed-measurement devices used in traffic control have sensors laid in the road surface which react to vehicles that pass over them and which generate speed measurement values; when an admissible speed limit is exceeded by a vehicle driving over the sensors, a picture of the vehicle is taken by a camera. In order to test the operatability of such speed measurement devices, error recognition means prevent the speed measurement values from being taken into account when certain error criteria occur. Counters are provided for counting the frequency of occurrence of error criteria. A determined statistical distribution of the occurrences of the various error criteria results for each installation. When deviations from this distribution are detected, that means that the installation needs to be modified.
IPC 1-7
IPC 8 full level
G01P 21/02 (2006.01); G08G 1/054 (2006.01)
CPC (source: EP)
G01P 21/02 (2013.01); G08G 1/054 (2013.01)
Citation (search report)
See references of WO 9322756A1
Designated contracting state (EPC)
CH DE FR GB LI NL
DOCDB simple family (publication)
WO 9322756 A1 19931111; CA 2134659 A1 19931111; DE 4214595 A1 19931104; EP 0638194 A1 19950215
DOCDB simple family (application)
EP 9301035 W 19930429; CA 2134659 A 19930429; DE 4214595 A 19920430; EP 93909860 A 19930429