Verification of loop sensing devices

G - Physics – 01 – V

Patent

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G01V 13/00 (2006.01) G08G 1/042 (2006.01)

Patent

CA 2497394

A verification apparatus for testing a loop detection system or loop sensor comprises one or more verification loops (222, 203, 223, 204) for placing adjacent the loop sensor (401, 402) and impedance varying means (303, 304) for varying the impedance of the or each verification loop. The change in impedance may be caused to move along the apparatus so as to simulate the passage of a vehicle past the loop sensor.

L'invention a trait à un appareil de vérification permettant de contrôler un système de détection à boucle ou un détecteur à boucle. Ledit appareil comprend une ou plusieurs boucles de vérification (222, 203, 223, 204) destinées à être placées de manière adjacente au détecteur à boucle (401, 402), et des moyens de variation d'impédance (303, 304) destinés à faire varier l'impédance de la ou les boucles de vérification. Il est possible de faire en sorte que la modification de l'impédance se déplace le long de l'appareil, afin que soit simulé le passage d'un véhicule à proximité du détecteur de boucle.

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