Portec Rail Products, Inc.

Stephen W Brown

Glen Appleby

Kostas Papazoglou

A sensor for detecting the presence of wheels of a rail vehicle includes first and second Hall Effect devices, a magnet for supplying a magnetic field to the first and second Hall Effect devices, the first and second Hall Effect devices and the magnet being mounted 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.

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Montreal, Canada

Stephen W Brown