Railway wheel sensor employing hall effect devices

Details Railway wheel sensor employing hall effect devices Railway wheel sensor employing hall effect devices

B - Operations, Transporting

61

L

B61L 1/08 (2006.01) B61L 1/06 (2006.01)

Patent

CA 2613747

A sensor for detecting the presence of wheels of a rail vehicle is disclosed. The sensor comprises first and second Hall Effect devices, a magnet for supplying a magnetic field to the first and second Hall Effect devices, means for mounting the first and second Hall Effect devices and the magnet adjacent to the rail, whereby a railway vehicle wheel changes the magnetic field in the Hall Effect devices to produce wheel indication signals, and a processing circuit for receiving the wheel indication signals from the first and second Hall Effect devices and for producing an output signal in response to the wheel indication signals. A method of detecting the presence of a wheel is also provided.

La présente invention concerne un capteur destiné à détecter la présence de roues d'un véhicule ferroviaire. Ce capteur comprend un premier et un second dispositif à effet Hall, un aimant permettant de fournir un champ magnétique au premier et au second dispositif à effet Hall, un organe permettant de monter le premier et le second dispositif à effet Hall et l'aimant à côté du rail, une roue de véhicule ferroviaire modifiant le champ magnétique dans les dispositifs à effets Hall de façon à produire des signaux indicateurs de roue et, un circuit de traitement destiné à recevoir ces signaux indicateurs de roue en provenance du premier et du second dispositif à effet Hall afin de produire un signal de sortie en réponse à ces signaux indicateurs de roue. Cette invention concerne aussi un procédé de détection de présence de roue.

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