Patent ID: 6995556
Filing Date: 2006-02-07
Classification: B61K,G01N,H01F

Abstract:
1. An electromagnetic (EM) gage sensing system for measuring at least gage distance between rails of a railroad track comprising: a first array of EM field generating coils extending substantially across said first rail and beyond an edge surface of said first rail, said first array of EM field generating coils being adapted to generate an EM field; a first array of EM field sensors positioned substantially between said first rail and said first array of EM field generating coils, said first array of EM field sensors being adapted to sense said EM field generated by said first array of EM field generating coils, and provide a first lateral EM field output signal; and a processor adapted to process said first lateral EM field output signal to determine position of said edge surface of said first rail.